郑德才博客

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Win32; //对注册表操作
using System.Collections; //使用Arraylist
using System.Security.Cryptography;//加密解密
using System.IO;    //文件操作
using System.Runtime.InteropServices;//调用DLL DllImport
using System.Management;  //获取硬件信息
using System.Net;       //获取IP地址是用到
using System.Drawing;   //image
using System.Net.NetworkInformation;    //ping 用到
using System.Text.RegularExpressions;   //正则
using System.Data;
using System.Data.SqlClient;
using Microsoft.VisualBasic;   //简体转繁体时用到
using System.Web;       //html UrlEncode

#region 注册表操作
public class GF_RegReadWrite
{

    /// <summary>
    /// 读取路径为keypath，键名为keyname的注册表键值，缺省返回def
    /// </summary>
    /// <param name="rootkey"></param>
    /// <param name="keypath">路径</param>
    /// <param name="keyname">键名</param>
    /// <param name="rtn">默认为null</param>
    /// <returns></returns>       
    static public bool GetRegVal(RegistryKey rootkey, string keypath, string keyname, out string rtn)
    {
        rtn = "";
        try
        {
            RegistryKey key = rootkey.OpenSubKey(keypath);
            rtn = key.GetValue(keyname).ToString();
            key.Close();
            return true;
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// 设置路径为keypath，键名为keyname的注册表键值为keyval
    /// </summary>
    /// <param name="rootkey"></param>
    /// <param name="keypath"></param>
    /// <param name="keyname"></param>
    /// <param name="keyval"></param>
    /// <returns></returns>
    static public bool SetRegVal(RegistryKey rootkey, string keypath, string keyname, string keyval)
    {
        try
        {
            RegistryKey key = rootkey.OpenSubKey(keypath, true);
            if (key == null)
                key = rootkey.CreateSubKey(keypath);
            key.SetValue(keyname, (object)keyval);
            key.Close();
            return true;
        }
        catch
        {
            return false;
        }
    }

    /// 创建路径为keypath的键
    private RegistryKey CreateRegKey(RegistryKey rootkey, string keypath)
    {
        try
        {
            return rootkey.CreateSubKey(keypath);
        }
        catch
        {
            return null;
        }
    }
    /// 删除路径为keypath的子项
    private bool DelRegSubKey(RegistryKey rootkey, string keypath)
    {
        try
        {
            rootkey.DeleteSubKey(keypath);
            return true;
        }
        catch
        {
            return false;
        }
    }
    /// 删除路径为keypath的子项及其附属子项
    private bool DelRegSubKeyTree(RegistryKey rootkey, string keypath)
    {
        try
        {
            rootkey.DeleteSubKeyTree(keypath);
            return true;
        }
        catch
        {
            return false;
        }
    }
    /// 删除路径为keypath下键名为keyname的键值
    private bool DelRegKeyVal(RegistryKey rootkey, string keypath, string keyname)
    {
        try
        {
            RegistryKey key = rootkey.OpenSubKey(keypath, true);
            key.DeleteValue(keyname);
            return true;
        }
        catch
        {
            return false;
        }
    }
}
#endregion
#region 类型转换
public class GF_Convert
{
    /// <summary>
    /// 字符串 转换 char数组
    /// </summary>
    /// <param name="in_str"></param>
    /// <param name="in_len"></param>
    /// <returns></returns>
    public static char[] string2chararray(string in_str, int in_len)
    {
        char[] ch = new char[in_len];
        in_str.ToCharArray().CopyTo(ch, 0);
        return ch;
    }

    /// <summary>
    /// char数组 转换 字符串
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>       
    public static string chararray2string(char[] in_str)
    {
        string out_str;
        out_str = new string(in_str);
        int i = out_str.IndexOf('\0', 0);
        if (i == -1)
            i = 16;
        return out_str.Substring(0, i);
    }

    /// <summary>
    /// byte数组 转换 字符串
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>
    public static string bytearray2string(byte[] in_str)
    {
        string out_str;
        out_str = System.Text.Encoding.Default.GetString(in_str);
        return out_str.Substring(0, out_str.IndexOf('\0', 0));

    }

    /// <summary>
    /// 字符串 转换 byte数组  注意转换出来会使原来的bytearray长度变短
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>
    public static byte[] string2bytearray(string in_str)
    {
        return System.Text.Encoding.Default.GetBytes(in_str);
    }

    /// <summary>
    /// 字符串 转换 byte数组  长度为传如的长度
    /// </summary>
    /// <param name="in_str">传入字符串</param>
    /// <param name="iLen">目标字节数组长度</param>
    /// <returns></returns>
    public static byte[] string2bytearray(string in_str, int iLen)
    {
        byte[] bytes = new byte[iLen];
        byte[] bsources = System.Text.Encoding.Default.GetBytes(in_str);
        Array.Copy(bsources, bytes, bsources.Length);


        return bytes;
    }

    /// <summary>
    /// 将字符串编码为Base64字符串
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static string Base64Encode(string str)
    {
        byte[] barray;
        barray = Encoding.Default.GetBytes(str);
        return Convert.ToBase64String(barray);
    }

    /// <summary>
    /// 将Base64字符串解码为普通字符串
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static string Base64Decode(string str)
    {
        byte[] barray;
        try
        {
            barray = Convert.FromBase64String(str);
            return Encoding.Default.GetString(barray);
        }
        catch
        {
            return str;
        }
    }

    /// <summary>
    /// 图片 转换 byte数组
    /// </summary>
    /// <param name="pic"></param>
    /// <param name="fmt"></param>
    /// <returns></returns>
    public static byte[] image_Image2Byte(Image pic, System.Drawing.Imaging.ImageFormat fmt)
    {
        MemoryStream mem = new MemoryStream();
        pic.Save(mem, fmt);
        mem.Flush();
        return mem.ToArray();
    }
    /// <summary>
    /// byte数组 转换 图片
    /// </summary>
    /// <param name="bytes"></param>
    /// <returns></returns>
    public static Image image_Byte2Image(byte[] bytes)
    {
        MemoryStream mem = new MemoryStream(bytes, true);
        mem.Read(bytes, 0, bytes.Length);
        mem.Flush();
        Image aa = Image.FromStream(mem);
        return aa;
    }

    /// <summary>
    /// ip 转换 长整形
    /// </summary>
    /// <param name="strIP"></param>
    /// <returns></returns>
    public static long IP2Long(string strIP)
    {

        long[] ip = new long[4];

        string[] s = strIP.Split('.');
        ip[0] = long.Parse(s[0]);
        ip[1] = long.Parse(s[1]);
        ip[2] = long.Parse(s[2]);
        ip[3] = long.Parse(s[3]);

        return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
    }

    /// <summary>
    /// 长整形 转换 IP
    /// </summary>
    /// <param name="longIP"></param>
    /// <returns></returns>
    public static string Long2IP(long longIP)
    {


        StringBuilder sb = new StringBuilder("");
        sb.Append(longIP >> 24);
        sb.Append(".");

        //将高8位置0，然后右移16为


        sb.Append((longIP & 0x00FFFFFF) >> 16);
        sb.Append(".");


        sb.Append((longIP & 0x0000FFFF) >> 8);
        sb.Append(".");

        sb.Append((longIP & 0x000000FF));


        return sb.ToString();
    }

    /// <summary>
    /// 将8位日期型整型数据转换为日期字符串数据
    /// </summary>
    /// <param name="date">整型日期</param>
    /// <param name="chnType">是否以中文年月日输出</param>
    /// <returns></returns>
    public static string FormatDate(int date, bool chnType)
    {
        string dateStr = date.ToString();

        if (date <= 0 || dateStr.Length != 8)
            return dateStr;

        if (chnType)
            return dateStr.Substring(0, 4) + "年" + dateStr.Substring(4, 2) + "月" + dateStr.Substring(6) + "日";

        return dateStr.Substring(0, 4) + "-" + dateStr.Substring(4, 2) + "-" + dateStr.Substring(6);
    }


    /// <summary>
    /// string型转换为bool型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的bool类型结果</returns>
    public static bool StrToBool(object expression, bool defValue)
    {
        if (expression != null)
            return StrToBool(expression, defValue);

        return defValue;
    }

    /// <summary>
    /// string型转换为bool型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的bool类型结果</returns>
    public static bool StrToBool(string expression, bool defValue)
    {
        if (expression != null)
        {
            if (string.Compare(expression, "true", true) == 0)
                return true;
            else if (string.Compare(expression, "false", true) == 0)
                return false;
        }
        return defValue;
    }
    /// <summary>
    /// 将对象转换为Int32类型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static int ObjectToInt(object expression)
    {
        return ObjectToInt(expression, 0);
    }

    /// <summary>
    /// 将对象转换为Int32类型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static int ObjectToInt(object expression, int defValue)
    {
        if (expression != null)
            return StrToInt(expression.ToString(), defValue);

        return defValue;
    }

    /// <summary>
    /// 将对象转换为Int32类型,转换失败返回0
    /// </summary>
    /// <param name="str">要转换的字符串</param>
    /// <returns>转换后的int类型结果</returns>
    public static int StrToInt(string str)
    {
        return StrToInt(str, 0);
    }

    /// <summary>
    /// 将对象转换为Int32类型
    /// </summary>
    /// <param name="str">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static int StrToInt(string str, int defValue)
    {
        if (string.IsNullOrEmpty(str) || str.Trim().Length >= 11 || !Regex.IsMatch(str.Trim(), @"^([-]|[0-9])[0-9]*(\.\w*)?$"))
            return defValue;

        int rv;
        if (Int32.TryParse(str, out rv))
            return rv;

        return Convert.ToInt32(StrToFloat(str, defValue));
    }

    /// <summary>
    /// string型转换为float型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static float StrToFloat(object strValue, float defValue)
    {
        if ((strValue == null))
            return defValue;

        return StrToFloat(strValue.ToString(), defValue);
    }

    /// <summary>
    /// string型转换为float型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static float ObjectToFloat(object strValue, float defValue)
    {
        if ((strValue == null))
            return defValue;

        return StrToFloat(strValue.ToString(), defValue);
    }

    /// <summary>
    /// string型转换为float型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static float ObjectToFloat(object strValue)
    {
        return ObjectToFloat(strValue.ToString(), 0);
    }

    /// <summary>
    /// string型转换为float型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <returns>转换后的int类型结果</returns>
    public static float StrToFloat(string strValue)
    {
        if ((strValue == null))
            return 0;

        return StrToFloat(strValue.ToString(), 0);
    }

    /// <summary>
    /// string型转换为float型
    /// </summary>
    /// <param name="strValue">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static float StrToFloat(string strValue, float defValue)
    {
        if ((strValue == null) || (strValue.Length > 10))
            return defValue;

        float intValue = defValue;
        if (strValue != null)
        {
            bool IsFloat = Regex.IsMatch(strValue, @"^([-]|[0-9])[0-9]*(\.\w*)?$");
            if (IsFloat)
                float.TryParse(strValue, out intValue);
        }
        return intValue;
    }

    /// <summary>
    /// 将对象转换为日期时间类型
    /// </summary>
    /// <param name="str">要转换的字符串</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static DateTime StrToDateTime(string str, DateTime defValue)
    {
        if (!string.IsNullOrEmpty(str))
        {
            DateTime dateTime;
            if (DateTime.TryParse(str, out dateTime))
                return dateTime;
        }
        return defValue;
    }

    /// <summary>
    /// 将对象转换为日期时间类型
    /// </summary>
    /// <param name="str">要转换的字符串</param>
    /// <returns>转换后的int类型结果</returns>
    public static DateTime StrToDateTime(string str)
    {
        return StrToDateTime(str, DateTime.Now);
    }

    /// <summary>
    /// 将对象转换为日期时间类型
    /// </summary>
    /// <param name="obj">要转换的对象</param>
    /// <returns>转换后的int类型结果</returns>
    public static DateTime ObjectToDateTime(object obj)
    {
        return StrToDateTime(obj.ToString());
    }

    /// <summary>
    /// 将对象转换为日期时间类型
    /// </summary>
    /// <param name="obj">要转换的对象</param>
    /// <param name="defValue">缺省值</param>
    /// <returns>转换后的int类型结果</returns>
    public static DateTime ObjectToDateTime(object obj, DateTime defValue)
    {
        return StrToDateTime(obj.ToString(), defValue);
    }

    /// <summary>
    /// 替换回车换行符为html换行符
    /// </summary>
    public static string StrFormat(string str)
    {
        string str2;

        if (str == null)
        {
            str2 = "";
        }
        else
        {
            str = str.Replace("\r\n", "<br />");
            str = str.Replace("\n", "<br />");
            str2 = str;
        }
        return str2;
    }

    /// <summary>
    /// 转换为简体中文
    /// </summary>
    public static string ToSChinese(string str)
    {
        return Strings.StrConv(str, VbStrConv.SimplifiedChinese, 0);

    }

    /// <summary>
    /// 转换为繁体中文
    /// </summary>
    public static string ToTChinese(string str)
    {
      
        return Strings.StrConv(str, VbStrConv.TraditionalChinese, 0);

    }


    /// <summary>
    /// 清除字符串数组中的重复项
    /// </summary>
    /// <param name="strArray">字符串数组</param>
    /// <param name="maxElementLength">字符串数组中单个元素的最大长度</param>
    /// <returns></returns>
    public static string[] DistinctStringArray(string[] strArray, int maxElementLength)
    {
        Hashtable h = new Hashtable();

        foreach (string s in strArray)
        {
            string k = s;
            if (maxElementLength > 0 && k.Length > maxElementLength)
            {
                k = k.Substring(0, maxElementLength);
            }
            h[k.Trim()] = s;
        }

        string[] result = new string[h.Count];

        h.Keys.CopyTo(result, 0);

        return result;
    }

    /// <summary>
    /// 清除字符串数组中的重复项
    /// </summary>
    /// <param name="strArray">字符串数组</param>
    /// <returns></returns>
    public static string[] DistinctStringArray(string[] strArray)
    {
        return DistinctStringArray(strArray, 0);
    }

}

#endregion
#region 加密解密
public class GF_Encrypt
{
    /// <summary>
    /// DES加密
    /// </summary>
    /// <param name="pToEncrypt">加密字符串</param>
    /// <param name="sKey">密钥</param>
    /// <returns></returns>
    public static string string_Encrypt(string pToEncrypt, string sKey)
    {
        if (pToEncrypt == "") return "";
        if (sKey.Length < 8) sKey = sKey + "xuE29xWp";
        if (sKey.Length > 8) sKey = sKey.Substring(0, 8);
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        //把字符串放到byte数组中 
        //原来使用的UTF8编码，我改成Unicode编码了，不行 
        byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
        //建立加密对象的密钥和偏移量 
        //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 
        //使得输入密码必须输入英文文本 
        des.Key = ASCIIEncoding.Default.GetBytes(sKey);
        des.IV = ASCIIEncoding.Default.GetBytes(sKey);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
        //Write  the  byte  array  into  the  crypto  stream 
        //(It  will  end  up  in  the  memory  stream) 
        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();
        //Get  the  data  back  from  the  memory  stream,  and  into  a  string 
        StringBuilder ret = new StringBuilder();
        foreach (byte b in ms.ToArray())
        {
            //Format  as  hex 
            ret.AppendFormat("{0:X2}", b);
        }
        ret.ToString();
        return ret.ToString();
    }

    /// <summary>
    /// DES解密
    /// </summary>
    /// <param name="pToDecrypt">解密字符串</param>
    /// <param name="sKey">解密密钥</param>
    /// <param name="outstr">返回值</param>
    /// <returns></returns>
    public static bool string_Decrypt(string pToDecrypt, string sKey, out string outstr)
    {
        if (pToDecrypt == "")
        {
            outstr = "";
            return true;
        };
        if (sKey.Length < 8) sKey = sKey + "xuE29xWp";
        if (sKey.Length > 8) sKey = sKey.Substring(0, 8);
        try
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            //Put  the  input  string  into  the  byte  array 
            byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
            for (int x = 0; x < pToDecrypt.Length / 2; x++)
            {
                int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }
            //建立加密对象的密钥和偏移量，此值重要，不能修改 
            des.Key = ASCIIEncoding.Default.GetBytes(sKey);
            des.IV = ASCIIEncoding.Default.GetBytes(sKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
            //Flush  the  data  through  the  crypto  stream  into  the  memory  stream 
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            //Get  the  decrypted  data  back  from  the  memory  stream 
            //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象 
            StringBuilder ret = new StringBuilder();
            outstr = System.Text.Encoding.Default.GetString(ms.ToArray());
            return true;
        }
        catch
        {
            outstr = "";
            return false;
        }
    }

    /// <summary>
    /// 加密
    /// </summary>
    public class AES
    {
        //默认密钥向量
        private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };

        public static string Encode(string encryptString, string encryptKey)
        {
            encryptKey = GF_GET.GetSubString(encryptKey, 32, "");
            encryptKey = encryptKey.PadRight(32, ' ');

            RijndaelManaged rijndaelProvider = new RijndaelManaged();
            rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
            rijndaelProvider.IV = Keys;
            ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();

            byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
            byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);

            return Convert.ToBase64String(encryptedData);
        }

        public static string Decode(string decryptString, string decryptKey)
        {
            try
            {
                decryptKey = GF_GET.GetSubString(decryptKey, 32, "");
                decryptKey = decryptKey.PadRight(32, ' ');

                RijndaelManaged rijndaelProvider = new RijndaelManaged();
                rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
                rijndaelProvider.IV = Keys;
                ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();

                byte[] inputData = Convert.FromBase64String(decryptString);
                byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);

                return Encoding.UTF8.GetString(decryptedData);
            }
            catch
            {
                return "";
            }

        }

    }

    /// <summary>
    /// 加密
    /// </summary>
    public class DES
    {
        //默认密钥向量
        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        /// <summary>
        /// DES加密字符串
        /// </summary>
        /// <param name="encryptString">待加密的字符串</param>
        /// <param name="encryptKey">加密密钥,要求为8位</param>
        /// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
        public static string Encode(string encryptString, string encryptKey)
        {
            encryptKey = GF_GET.GetSubString(encryptKey, 8, "");
            encryptKey = encryptKey.PadRight(8, ' ');
            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
            byte[] rgbIV = Keys;
            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
            MemoryStream mStream = new MemoryStream();
            CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            return Convert.ToBase64String(mStream.ToArray());

        }

        /// <summary>
        /// DES解密字符串
        /// </summary>
        /// <param name="decryptString">待解密的字符串</param>
        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
        public static string Decode(string decryptString, string decryptKey)
        {
            try
            {
                decryptKey = GF_GET.GetSubString(decryptKey, 8, "");
                decryptKey = decryptKey.PadRight(8, ' ');
                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return "";
            }
        }
    }

    /// <summary>
    /// MD5函数
    /// </summary>
    /// <param name="str">原始字符串</param>
    /// <returns>MD5结果</returns>
    public static string MD5(string str)
    {
        byte[] b = Encoding.UTF8.GetBytes(str);
        b = new MD5CryptoServiceProvider().ComputeHash(b);
        string ret = "";
        for (int i = 0; i < b.Length; i++)
            ret += b[i].ToString("x").PadLeft(2, '0');

        return ret;
    }

    /// <summary>
    /// SHA256函数
    /// </summary>
    /// /// <param name="str">原始字符串</param>
    /// <returns>SHA256结果</returns>
    public static string SHA256(string str)
    {
        byte[] SHA256Data = Encoding.UTF8.GetBytes(str);
        SHA256Managed Sha256 = new SHA256Managed();
        byte[] Result = Sha256.ComputeHash(SHA256Data);
        return Convert.ToBase64String(Result);  //返回长度为44字节的字符串
    }
}

#endregion
#region 读取ini文件
//读写INI
public class GF_INI
{
    [DllImport("kernel32")]
    private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
    [DllImport("kernel32")]
    private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
    [DllImport("kernel32.dll")]
    public static extern int Beep(int dwFreq, int dwDuration);

    //读ini
    public static void iniFile_SetVal(string in_filename, string Section, string Key, string Value)
    {
        WritePrivateProfileString(Section, Key, Value, in_filename);
    }

    //写INI
    public static string iniFile_GetVal(string in_filename, string Section, string Key)
    {
        StringBuilder temp = new StringBuilder(255);
        int i = GetPrivateProfileString(Section, Key, "", temp, 255, in_filename);
        if (i == 0)
            return "";
        else
            return temp.ToString();
    }
}
#endregion
#region 硬件信息
//硬件信息
public class GF_Hardware
{
    /// <summary>
    /// cpu序列号
    /// </summary>
    /// <returns></returns>
    public static string getID_CpuId()
    {

        string cpuInfo = "";//cpu序列号
        ManagementClass cimobject = new ManagementClass("Win32_Processor");
        ManagementObjectCollection moc = cimobject.GetInstances();
        foreach (ManagementObject mo in moc)
        {
            cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
        }
        return cpuInfo;
    }

    /// <summary>
    /// 硬盘ID号
    /// </summary>
    /// <returns></returns>
    public static string getID_HardDiskId()
    {
        string HDid = "";
        ManagementClass cimobject = new ManagementClass("Win32_DiskDrive");
        ManagementObjectCollection moc = cimobject.GetInstances();
        foreach (ManagementObject mo in moc)
        {
            HDid = (string)mo.Properties["Model"].Value;
        }
        return HDid;
    }

    /// <summary>
    /// 获取网卡MacAddress
    /// </summary>
    /// <returns></returns>
    public static string getID_NetCardId()
    {
        string NCid = "";
        ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
        ManagementObjectCollection moc = mc.GetInstances();
        foreach (ManagementObject mo in moc)
        {
            if ((bool)mo["IPEnabled"] == true)
                NCid = mo["MacAddress"].ToString();
            mo.Dispose();
        }
        return NCid;
    }



}
#endregion
#region 网络部分
//网络部分
public class GF_Network
{
    /*
     * C#完整的通信代码（点对点，点对多，同步，异步，UDP，TCP）  
     * http://topic.csdn.net/u/20080619/08/dcef3fe2-f95b-4918-8edb-36d48a3d0528_2.html
     *
     */


    /// <summary>
    /// 获取IP地址 返回第一个
    /// </summary>
    /// <returns></returns>
    public static string getIP_This()
    {
        IPHostEntry hostInfo = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress[] address = hostInfo.AddressList;
        if (address.Length == 0)
            return "";
        else
            return address[0].ToString();
    }

    /// <summary>
    /// ping IP地址 timeout 局域网用200,广域网用2000
    /// </summary>
    /// <param name="ip">IP地址</param>
    /// <param name="timeout">超时 毫秒</param>
    /// <returns></returns>
    public static bool ping(string ip, int timeout)
    {
        IPAddress ipadd;
        if (!IPAddress.TryParse(ip, out ipadd))
        {
            return false;
        }
        Ping pingSender = new Ping();
        PingReply reply = pingSender.Send(ip, timeout, new Byte[] { Convert.ToByte(1) });
        if (reply.Status == IPStatus.Success)
            return true;
        else
            return false;
    }
    /// <summary>
    /// 判读是否是IP地址
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>
    public static bool IsIPStr(string in_str)
    {
        if (in_str.Replace(".", "").Length != in_str.Length - 3)
            return false;
        try
        {
            IPAddress ip = IPAddress.Parse(in_str);
            return true;
        }
        catch
        {
            return false;
        }
    }


}

#endregion
#region 文件操作
//文件操作
public class GF_File
{

    /// <summary>
    /// 写日志文件
    /// </summary>
    /// <param name="sPath">    年月  例  2011-04</param>
    /// <param name="sFileName">月日  例  04-22</param>
    /// <param name="content">时间+  内容</param>
    /// <returns></returns>
    public static bool WriteLog(string sPath, string sFileName, string content)
    {
        try
        {


            StreamWriter sr;
            if (!Directory.Exists(sPath))
            {
                Directory.CreateDirectory(sPath);
            }
            string v_filename = sPath + "\\" + sFileName;


            if (!File.Exists(v_filename)) //如果文件存在,则创建File.AppendText对象
            {
                sr = File.CreateText(v_filename);
                sr.Close();
            }
            using (FileStream fs = new FileStream(v_filename, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.Write))
            {
                using (sr = new StreamWriter(fs))
                {

                    sr.WriteLine(DateTime.Now.ToString("hh:mm:ss") + "     " + content);
                    sr.Close();
                }
                fs.Close();
            }
            return true;

        }
        catch { return false; }
    }


    /// <summary>
    /// 读取文本文件内容,每行存入arrayList 并返回arrayList对象
    /// </summary>
    /// <param name="sFileName"></param>
    /// <returns>arrayList</returns>
    public static ArrayList ReadFileRow(string sFileName)
    {
        string sLine = "";
        ArrayList alTxt = null;
        try
        {
            using (StreamReader sr = new StreamReader(sFileName))
            {
                alTxt = new ArrayList();

                while (!sr.EndOfStream)
                {
                    sLine = sr.ReadLine();
                    if (sLine != "")
                    {
                        alTxt.Add(sLine.Trim());
                    }

                }
                sr.Close();
            }
        }
        catch
        {

        }
        return alTxt;
    }


    /// <summary>
    /// 备份文件
    /// </summary>
    /// <param name="sourceFileName">源文件名</param>
    /// <param name="destFileName">目标文件名</param>
    /// <param name="overwrite">当目标文件存在时是否覆盖</param>
    /// <returns>操作是否成功</returns>
    public static bool BackupFile(string sourceFileName, string destFileName, bool overwrite)
    {
        if (!System.IO.File.Exists(sourceFileName))
            throw new FileNotFoundException(sourceFileName + "文件不存在！");

        if (!overwrite && System.IO.File.Exists(destFileName))
            return false;

        try
        {
            System.IO.File.Copy(sourceFileName, destFileName, true);
            return true;
        }
        catch (Exception e)
        {
            throw e;
        }
    }


    /// <summary>
    /// 备份文件,当目标文件存在时覆盖
    /// </summary>
    /// <param name="sourceFileName">源文件名</param>
    /// <param name="destFileName">目标文件名</param>
    /// <returns>操作是否成功</returns>
    public static bool BackupFile(string sourceFileName, string destFileName)
    {
        return BackupFile(sourceFileName, destFileName, true);
    }


    /// <summary>
    /// 恢复文件
    /// </summary>
    /// <param name="backupFileName">备份文件名</param>
    /// <param name="targetFileName">要恢复的文件名</param>
    /// <param name="backupTargetFileName">要恢复文件再次备份的名称,如果为null,则不再备份恢复文件</param>
    /// <returns>操作是否成功</returns>
    public static bool RestoreFile(string backupFileName, string targetFileName, string backupTargetFileName)
    {
        try
        {
            if (!System.IO.File.Exists(backupFileName))
                throw new FileNotFoundException(backupFileName + "文件不存在！");

            if (backupTargetFileName != null)
            {
                if (!System.IO.File.Exists(targetFileName))
                    throw new FileNotFoundException(targetFileName + "文件不存在！无法备份此文件！");
                else
                    System.IO.File.Copy(targetFileName, backupTargetFileName, true);
            }
            System.IO.File.Delete(targetFileName);
            System.IO.File.Copy(backupFileName, targetFileName);
        }
        catch (Exception e)
        {
            throw e;
        }
        return true;
    }

    public static bool RestoreFile(string backupFileName, string targetFileName)
    {
        return RestoreFile(backupFileName, targetFileName, null);
    }
}

#endregion
#region 屏幕操作
//获取部分
public class GF_GET
{
    /// <summary>
    /// 根据坐标点获取屏幕图像
    /// </summary>
    /// <param name="x1">左上角横坐标</param>
    /// <param name="y1">左上角纵坐标</param>
    /// <param name="x2">右下角横坐标</param>
    /// <param name="y2">右下角纵坐标</param>
    /// <returns></returns>
    public static Image GetScreen(int x1, int y1, int x2, int y2)
    {
        int w = (x2 - x1);
        int h = (y2 - y1);
        Image myImage = new Bitmap(w, h);
        Graphics g = Graphics.FromImage(myImage);
        g.CopyFromScreen(new Point(x1, y1), new Point(0, 0), new Size(w, h));
        IntPtr dc1 = g.GetHdc();
        g.ReleaseHdc(dc1);
        return myImage;
    }

    /// <summary>
    /// 获取指定文件的扩展名 例:  .txt
    /// </summary>
    /// <param name="fileName">指定文件名</param>
    /// <returns>扩展名</returns>
    public static string GetFileExtName(string fileName)
    {
        if (GF_IsOk.IsStrNullOrEmpty(fileName) || fileName.IndexOf('.') <= 0)
            return "";

        fileName = fileName.ToLower().Trim();


        return fileName.Substring(fileName.LastIndexOf('.'), fileName.Length - fileName.LastIndexOf('.'));
    }

    public static string GetSubString(string p_SrcString, int p_Length, string p_TailString)
    {
        return GetSubString(p_SrcString, 0, p_Length, p_TailString);
    }

    public static string GetUnicodeSubString(string str, int len, string p_TailString)
    {
        string result = string.Empty;// 最终返回的结果
        int byteLen = System.Text.Encoding.Default.GetByteCount(str);// 单字节字符长度
        int charLen = str.Length;// 把字符平等对待时的字符串长度
        int byteCount = 0;// 记录读取进度
        int pos = 0;// 记录截取位置
        if (byteLen > len)
        {
            for (int i = 0; i < charLen; i++)
            {
                if (Convert.ToInt32(str.ToCharArray()[i]) > 255)// 按中文字符计算加2
                    byteCount += 2;
                else// 按英文字符计算加1
                    byteCount += 1;
                if (byteCount > len)// 超出时只记下上一个有效位置
                {
                    pos = i;
                    break;
                }
                else if (byteCount == len)// 记下当前位置
                {
                    pos = i + 1;
                    break;
                }
            }

            if (pos >= 0)
                result = str.Substring(0, pos) + p_TailString;
        }
        else
            result = str;

        return result;
    }

    /// <summary>
    /// 取指定长度的字符串
    /// </summary>
    /// <param name="p_SrcString">要检查的字符串</param>
    /// <param name="p_StartIndex">起始位置</param>
    /// <param name="p_Length">指定长度</param>
    /// <param name="p_TailString">用于替换的字符串</param>
    /// <returns>截取后的字符串</returns>
    public static string GetSubString(string p_SrcString, int p_StartIndex, int p_Length, string p_TailString)
    {
        string myResult = p_SrcString;

        Byte[] bComments = Encoding.UTF8.GetBytes(p_SrcString);
        foreach (char c in Encoding.UTF8.GetChars(bComments))
        {    //当是日文或韩文时(注:中文的范围:\u4e00 - \u9fa5, 日文在\u0800 - \u4e00, 韩文为\xAC00-\xD7A3)
            if ((c > '\u0800' && c < '\u4e00') || (c > '\xAC00' && c < '\xD7A3'))
            {
                //if (System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[\u0800-\u4e00]+") || System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[\xAC00-\xD7A3]+"))
                //当截取的起始位置超出字段串长度时
                if (p_StartIndex >= p_SrcString.Length)
                    return "";
                else
                    return p_SrcString.Substring(p_StartIndex,
                                                   ((p_Length + p_StartIndex) > p_SrcString.Length) ? (p_SrcString.Length - p_StartIndex) : p_Length);
            }
        }

        if (p_Length >= 0)
        {
            byte[] bsSrcString = Encoding.Default.GetBytes(p_SrcString);

            //当字符串长度大于起始位置
            if (bsSrcString.Length > p_StartIndex)
            {
                int p_EndIndex = bsSrcString.Length;

                //当要截取的长度在字符串的有效长度范围内
                if (bsSrcString.Length > (p_StartIndex + p_Length))
                {
                    p_EndIndex = p_Length + p_StartIndex;
                }
                else
                {   //当不在有效范围内时,只取到字符串的结尾

                    p_Length = bsSrcString.Length - p_StartIndex;
                    p_TailString = "";
                }

                int nRealLength = p_Length;
                int[] anResultFlag = new int[p_Length];
                byte[] bsResult = null;

                int nFlag = 0;
                for (int i = p_StartIndex; i < p_EndIndex; i++)
                {
                    if (bsSrcString[i] > 127)
                    {
                        nFlag++;
                        if (nFlag == 3)
                            nFlag = 1;
                    }
                    else
                        nFlag = 0;

                    anResultFlag[i] = nFlag;
                }

                if ((bsSrcString[p_EndIndex - 1] > 127) && (anResultFlag[p_Length - 1] == 1))
                    nRealLength = p_Length + 1;

                bsResult = new byte[nRealLength];

                Array.Copy(bsSrcString, p_StartIndex, bsResult, 0, nRealLength);

                myResult = Encoding.Default.GetString(bsResult);
                myResult = myResult + p_TailString;
            }
        }

        return myResult;
    }

    /// <summary>
    /// 获取Email HostName 例 liyangfd@gmail.com   获取出来时@gmail.com
    /// </summary>
    /// <param name="strEmail"></param>
    /// <returns></returns>
    public static string GetEmailHostName(string strEmail)
    {
        if (strEmail.IndexOf("@") < 0)
        {
            return "";
        }
        return strEmail.Substring(strEmail.LastIndexOf("@")).ToLower();
    }

    /// <summary>
    /// 返回URL中结尾的文件名
    /// </summary>       
    public static string GetFilename(string url)
    {
        if (url == null)
        {
            return "";
        }
        string[] strs1 = url.Split(new char[] { '/' });
        return strs1[strs1.Length - 1].Split(new char[] { '?' })[0];
    }


    /// <summary>
    /// 根据阿拉伯数字返回月份的名称(可更改为某种语言)
    /// </summary>   
    public static string[] Monthes
    {
        get
        {
            return new string[] { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
        }
    }
}

#endregion
#region 判断操作
//判断部分
public class GF_IsOk
{
    /// <summary>
    /// 判读是否是IP地址
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>
    public static bool IsIPStr(string in_str)
    {
        IPAddress ip;
        return IPAddress.TryParse(in_str, out ip);
    }

    /// <summary>
    /// 判断是否是数字
    /// </summary>
    /// <param name="strNumber"></param>
    /// <returns></returns>
    public static bool IsNumber(string strNumber)
    {

        Regex objNotNumberPattern = new Regex("[^0-9.-]");
        Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*");
        Regex objTwoMinusPattern = new Regex("[0-9]*[-][0-9]*[-][0-9]*");
        String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
        String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
        Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");
        return !objNotNumberPattern.IsMatch(strNumber) &&
               !objTwoDotPattern.IsMatch(strNumber) &&
               !objTwoMinusPattern.IsMatch(strNumber) &&
               objNumberPattern.IsMatch(strNumber);
    }

    /// <summary>
    ///  判断是否是日期字符串
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>
    public static bool IsDateStr_yyyymmdd(string in_str)
    {
        if (in_str == "") return true;
        if (in_str.Length != 8) return false;
        return IsDateStr(in_str);
    }

    /// <summary>
    /// 判断是否是日期字符串
    /// </summary>
    /// <param name="in_str"></param>
    /// <returns></returns>
    public static bool IsDateStr(string in_str)
    {
        if (in_str == "") return true;
        if (in_str.Length == 8)
            in_str = in_str.Substring(0, 4) + "-" + in_str.Substring(4, 2) + "-" + in_str.Substring(6, 2);
        DateTime dtDate;
        bool bValid = true;
        try
        {
            dtDate = DateTime.Parse(in_str);
        }
        catch (FormatException)
        {
            // 如果解析方法失败则表示不是日期性数据
            bValid = false;
        }
        return bValid;
    }

    /// <summary>
    /// 判断字符串中是否包含汉字,有返回true 否则为false
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsExistHanZi(string str)
    {
        Regex reg = new Regex(@"[\u4e00-\u9fa5]");//正则表达式
        if (reg.IsMatch(str))
        {
            return true;
        }
        else
        {
            return false;
        }
    }


    /// <summary>
    /// 字段串是否为Null或为""(空)
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsStrNullOrEmpty(string str)
    {
        if (str == null || str.Trim() == string.Empty)
            return true;

        return false;
    }

    /// <summary>
    /// 返回文件是否存在
    /// </summary>
    /// <param name="filename">文件名</param>
    /// <returns>是否存在</returns>
    public static bool IsFileExists(string filename)
    {
        return System.IO.File.Exists(filename);
    }


    /// <summary>
    /// 检测是否符合email格式
    /// </summary>
    /// <param name="strEmail">要判断的email字符串</param>
    /// <returns>判断结果</returns>
    public static bool IsValidEmail(string strEmail)
    {
        return Regex.IsMatch(strEmail, @"^[\w\.]+([-]\w+)*@[A-Za-z0-9-_]+[\.][A-Za-z0-9-_]");
    }

    public static bool IsValidDoEmail(string strEmail)
    {
        return Regex.IsMatch(strEmail, @"^@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
    }
    /// <summary>
    /// 检测是否是正确的Url
    /// </summary>
    /// <param name="strUrl">要验证的Url</param>
    /// <returns>判断结果</returns>
    public static bool IsURL(string strUrl)
    {
        return Regex.IsMatch(strUrl, @"^(http|https)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{1,10}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
    }

    /// <summary>
    /// 判断是否为base64字符串
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsBase64String(string str)
    {
        //A-Z, a-z, 0-9, +, /, =
        return Regex.IsMatch(str, @"[A-Za-z0-9\+\/\=]");
    }

    /// <summary>
    /// 检测是否有Sql危险字符
    /// </summary>
    /// <param name="str">要判断字符串</param>
    /// <returns>判断结果</returns>
    public static bool IsSafeSqlString(string str)
    {
        return !Regex.IsMatch(str, @"[-|;|,|\/|\(|\)|\[|\]|\}|\{|%|@|\*|!|\']");
    }





}
#endregion
#region 数据库操作
//数据库
public class GF_DA
{
    /// <summary>
    /// 执行SQL语句 sConnStr 连接字符串,sql执行的sql命令 返回第一行第一列
    /// </summary>
    /// <param name="sConnStr"></param>
    /// <param name="sql"></param>
    /// <returns></returns>
    public static object ExecSQL(string sConnStr, string sql)
    {
        using (SqlConnection conn = new SqlConnection(sConnStr))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                try
                {
                    conn.Open();
                    cmd.Connection = conn;
                    cmd.CommandText = sql;
                    return cmd.ExecuteScalar();
                }
                catch
                {
                    return null;
                }
            }

        }
    }

    /// <summary>
    /// 执行SQL数组 
    /// </summary>
    /// <param name="sConnStr"></param>
    /// <param name="alSql"></param>
    /// <param name="iLen"></param>
    public static void ExecSQL(string sConnStr, ArrayList alSql, int iLen)
    {
        using (SqlConnection conn = new SqlConnection(sConnStr))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                try
                {
                    conn.Open();
                    cmd.Connection = conn;
                    for (int i = 0; i < alSql.Count; i++)
                    {
                        cmd.CommandText = alSql[i].ToString();
                        cmd.ExecuteNonQuery();

                    }
                }
                catch
                {

                }
            }

        }
    }

    /// <summary>
    /// 填充数据 返回DataTable
    /// </summary>
    /// <param name="sConnStr"></param>
    /// <param name="sql"></param>
    /// <param name="sTableName"></param>
    /// <returns></returns>
    public static DataTable DataFill(string sConnStr, string sql, string sTableName)
    {
        using (SqlConnection conn = new SqlConnection(sConnStr))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                DataSet ds = new DataSet();
                try
                {
                    conn.Open();
                    cmd.Connection = conn;
                    cmd.CommandText = sql;
                    SqlDataAdapter ap = new SqlDataAdapter(cmd);
                    ap.Fill(ds, sTableName);
                    return ds.Tables[0];
                }
                catch
                {
                    return null;
                }
            }


        }
    }
}
#endregion
#region 各种进制转换

public sealed class DataConvert
{
    #region Helperfunctions

    /// <summary>
    /// 十进制转换为二进制
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public static string DecToBin(string x)
    {
        string z = null;
        int X = Convert.ToInt32(x);
        int i = 0;
        long a, b = 0;
        while (X > 0)
        {
            a = X % 2;
            X = X / 2;
            b = b + a * Pow(10, i);
            i++;
        }
        z = Convert.ToString(b);return z;
    }

    /// <summary>
    /// 16进制转ASCII码
    /// </summary>
    /// <param name="hexString"></param>
    /// <returns></returns>
    public static string HexToAscii(string hexString)
    {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i <= hexString.Length - 2; i += 2)
        {
            sb.Append(
                Convert.ToString(
                    Convert.ToChar(Int32.Parse(hexString.Substring(i, 2),
                                               System.Globalization.NumberStyles.HexNumber))));
        }
        return sb.ToString();
    }

    /// <summary>
    /// 十进制转换为八进制
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public static string DecToOtc(string x)
    {
        string z = null;
        int X = Convert.ToInt32(x);
        int i = 0;
        long a, b = 0;
        while (X > 0)
        {
            a = X % 8;
            X = X / 8;
            b = b + a * Pow(10, i);
            i++;
        }
        z = Convert.ToString(b);
        return z;
    }

    /// <summary>
    /// 十进制转换为十六进制
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public static string DecToHex(string x)
    {
        if (string.IsNullOrEmpty(x))
        {
            return "0";
        }
        string z = null;
        int X = Convert.ToInt32(x);
        Stack a = new Stack();
        int i = 0;
        while (X > 0)
        {
            a.Push(Convert.ToString(X % 16));
            X = X / 16;
            i++;
        }
        while (a.Count != 0)
            z += ToHex(Convert.ToString(a.Pop()));
        if (string.IsNullOrEmpty(z))
        {
            z = "0";
        }
        return z;
    }

    /// <summary>
    /// 二进制转换为十进制
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public static string BinToDec(string x)
    {
        string z = null;
        int X = Convert.ToInt32(x);
        int i = 0;
        long a, b = 0;
        while (X > 0)
        {
            a = X % 10;
            X = X / 10;
            b = b + a * Pow(2, i);
            i++;
        }
        z = Convert.ToString(b);
        return z;
    }

    /// <summary>
    /// 二进制转换为十进制，定长转换
    /// </summary>
    /// <param name="x"></param>
    /// <param name="iLength"></param>
    /// <returns></returns>
    public static string BinToDec(string x, short iLength)
    {
        StringBuilder sb = new StringBuilder();
        int iCount = 0;

        iCount = x.Length / iLength;

        if (x.Length % iLength > 0)
        {
            iCount += 1;
        }

        int X = 0;

        for (int i = 0; i < iCount; i++)
        {
            if ((i + 1) * iLength > x.Length)
            {
                X = Convert.ToInt32(x.Substring(i * iLength, (x.Length - iLength)));
            }
            else
            {
                X = Convert.ToInt32(x.Substring(i * iLength, iLength));
            }
            int j = 0;
            long a, b = 0;
            while (X > 0)
            {
                a = X % 10;
                X = X / 10;
                b = b + a * Pow(2, j);
                j++;
            }
            sb.AppendFormat("{0:D2}", b);
        }
        return sb.ToString();
    }

    /// <summary>
    /// 二进制转换为十六进制，定长转换
    /// </summary>
    /// <param name="x"></param>
    /// <param name="iLength"></param>
    /// <returns></returns>
    public static string BinToHex(string x, short iLength)
    {
        StringBuilder sb = new StringBuilder();
        int iCount = 0;

        iCount = x.Length / iLength;

        if (x.Length % iLength > 0)
        {
            iCount += 1;
        }

        int X = 0;

        for (int i = 0; i < iCount; i++)
        {
            if ((i + 1) * iLength > x.Length)
            {
                X = Convert.ToInt32(x.Substring(i * iLength, (x.Length - iLength)));
            }
            else
            {
                X = Convert.ToInt32(x.Substring(i * iLength, iLength));
            }
            int j = 0;
            long a, b = 0;
            while (X > 0)
            {
                a = X % 10;
                X = X / 10;
                b = b + a * Pow(2, j);
                j++;
            }
            //前补0
            sb.Append(DecToHex(b.ToString()));
        }
        return sb.ToString();
    }

    /// <summary>
    /// 八进制转换为十进制
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public static string OctToDec(string x)
    {
        string z = null;
        int X = Convert.ToInt32(x);
        int i = 0;
        long a, b = 0;
        while (X > 0)
        {
            a = X % 10;
            X = X / 10;
            b = b + a * Pow(8, i);
            i++;
        }
        z = Convert.ToString(b);
        return z;
    }


    /// <summary>
    /// 十六进制转换为十进制
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public static string HexToDec(string x)
    {
        if (string.IsNullOrEmpty(x))
        {
            return "0";
        }
        string z = null;
        Stack a = new Stack();
        int i = 0, j = 0, l = x.Length;
        long Tong = 0;
        while (i < l)
        {
            a.Push(ToDec(Convert.ToString(x[i])));
            i++;
        }
        while (a.Count != 0)
        {
            Tong = Tong + Convert.ToInt64(a.Pop()) * Pow(16, j);
            j++;
        }
        z = Convert.ToString(Tong);
        return z;
    }

    #endregion //Helperfunctions


    /// <summary>
    /// 方法次幂
    /// </summary>
    /// <param name="x"></param>
    /// <param name="y"></param>
    /// <returns></returns>
    private static long Pow(long x, long y)
    {
        int i = 1;
        long X = x;
        if (y == 0)
            return 1;
        while (i < y)
        {
            x = x * X;
            i++;
        }
        return x;
    }

    /// <summary>
    /// 16进制转10进制时候特殊的几个
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    private static string ToDec(string x)
    {
        switch (x)
        {
            case "A":
                return "10";
            case "B":
                return "11";
            case "C":
                return "12";
            case "D":
                return "13";
            case "E":
                return "14";
            case "F":
                return "15";
            default:
                return x;
        }
    }

    /// <summary>
    /// 10进制转16进制时候特殊的几个
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    private static string ToHex(string x)
    {
        switch (x)
        {
            case "10":
                return "A";
            case "11":
                return "B";
            case "12":
                return "C";
            case "13":
                return "D";
            case "14":
                return "E";
            case "15":
                return "F";
            default:
                return x;
        }
    }

    /// <summary>
    /// 将16进制BYTE数组转换成16进制字符串
    /// </summary>
    /// <param name="bytes"></param>
    /// <returns></returns>
    public static string ToHexString(byte[] bytes) // 0xae00cf => "AE00CF "
    {
        string hexString = string.Empty;
        if (bytes != null)
        {
            StringBuilder strB = new StringBuilder();

            for (int i = 0; i < bytes.Length; i++)
            {
                strB.Append(bytes[i].ToString("X2"));
            }
            hexString = strB.ToString();
        }
        return hexString;
    }
}
#endregion