最近在asp.net中总是用到TreeView,有一些基本的操作,比如选中所有子节点,选中父节点之类的,每次用的时候都得找以前的代码段拷贝,挺烦的,现在就把这些放在这里,方便以后使用 ^_^
1. 选中所有子节点:
function OnTreeNodeChecked()
{
var ele = window.event.srcElement;
if(ele.type=='checkbox')
{
var childrenDivID = ele.id.replace('CheckBox','Nodes');
var div = document.getElementById(childrenDivID);
if(div==null)return;
var checkBoxs = div.getElementsByTagName('INPUT');
for(var i=0;i<checkBoxs.length;i++)
{
if(checkBoxs[i].type=='checkbox')
checkBoxs[i].checked=ele.checked;
}
}
}
{
var ele = window.event.srcElement;
if(ele.type=='checkbox')
{
var childrenDivID = ele.id.replace('CheckBox','Nodes');
var div = document.getElementById(childrenDivID);
if(div==null)return;
var checkBoxs = div.getElementsByTagName('INPUT');
for(var i=0;i<checkBoxs.length;i++)
{
if(checkBoxs[i].type=='checkbox')
checkBoxs[i].checked=ele.checked;
}
}
}
2. 如果要选中子节点又同时选中所有父节点:
function getParentByTagName(element,tagName)
{
var parent = element.parentNode;
var upperTagName = tagName.toUpperCase();
while (parent && (parent.tagName.toUpperCase() != upperTagName))
{
parent = parent.parentNode ? parent.parentNode : parent.parentElement;
}
return parent;
}
function setParentChecked(objNode)
{
var objParentDiv = getParentByTagName(objNode,"div");
if(objParentDiv == null || objParentDiv == "undefined")
return;
var objID = objParentDiv.getAttribute("ID");
var objParentCheckBox = document.getElementById(objID.replace("Nodes","CheckBox"));
if(objParentCheckBox == null || objParentCheckBox == "undefined")
return;
if(objParentCheckBox.tagName!="INPUT" && objParentCheckBox.type == "checkbox")
return;
objParentCheckBox.checked = true;
setParentChecked(objParentCheckBox);
}
function setChildCheckedState(div,state)
{
var objchild = div.childNodes;
var count = objchild.length;
for(var i=0;i<objchild.length;i++)
{
var tempObj = objchild[i];
if(tempObj.tagName=="INPUT" && tempObj.type == "checkbox")
{
tempObj.checked = state;
}
setChildCheckedState(tempObj,state);
}
}
function TreeNodeChecked()
{
var objNode = window.event.srcElement;
if(objNode.tagName!="INPUT" || objNode.type!="checkbox")
return;
if(objNode.checked == true)
{
setParentChecked(objNode);
}
var objID = objNode.getAttribute("ID");
var objParentDiv = document.getElementById(objID.replace("CheckBox","Nodes"));
if(objParentDiv==null || typeof(objParentDiv) == "undefined")
return;
setChildCheckedState(objParentDiv,objNode.checked);
}
{
var parent = element.parentNode;
var upperTagName = tagName.toUpperCase();
while (parent && (parent.tagName.toUpperCase() != upperTagName))
{
parent = parent.parentNode ? parent.parentNode : parent.parentElement;
}
return parent;
}
function setParentChecked(objNode)
{
var objParentDiv = getParentByTagName(objNode,"div");
if(objParentDiv == null || objParentDiv == "undefined")
return;
var objID = objParentDiv.getAttribute("ID");
var objParentCheckBox = document.getElementById(objID.replace("Nodes","CheckBox"));
if(objParentCheckBox == null || objParentCheckBox == "undefined")
return;
if(objParentCheckBox.tagName!="INPUT" && objParentCheckBox.type == "checkbox")
return;
objParentCheckBox.checked = true;
setParentChecked(objParentCheckBox);
}
function setChildCheckedState(div,state)
{
var objchild = div.childNodes;
var count = objchild.length;
for(var i=0;i<objchild.length;i++)
{
var tempObj = objchild[i];
if(tempObj.tagName=="INPUT" && tempObj.type == "checkbox")
{
tempObj.checked = state;
}
setChildCheckedState(tempObj,state);
}
}
function TreeNodeChecked()
{
var objNode = window.event.srcElement;
if(objNode.tagName!="INPUT" || objNode.type!="checkbox")
return;
if(objNode.checked == true)
{
setParentChecked(objNode);
}
var objID = objNode.getAttribute("ID");
var objParentDiv = document.getElementById(objID.replace("CheckBox","Nodes"));
if(objParentDiv==null || typeof(objParentDiv) == "undefined")
return;
setChildCheckedState(objParentDiv,objNode.checked);
}
后台的给treeview添加onclick事件处理:
m_Tree.Attributes.Add("onclick", "TreeNodeChecked();");
3.每次只选中一个节点,相对与互斥,这个很好实现
function TreeNodeChecked()
{
var objNode = window.event.srcElement;
if(objNode.tagName!="INPUT" || objNode.type !="checkbox")
return;
if(window.lastCheckNode != null)
window.lastCheckNode.checked = false;
window.lastCheckNode = objNode;
}
{
var objNode = window.event.srcElement;
if(objNode.tagName!="INPUT" || objNode.type !="checkbox")
return;
if(window.lastCheckNode != null)
window.lastCheckNode.checked = false;
window.lastCheckNode = objNode;
}
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