郑德才博客

1.   DataGridView中增加一列为COMBOX并绑定数据源

DataGridViewComboBoxColumn newColumn = new DataGridViewComboBoxColumn();
              
                newColumn.DataSource = stateList;
                newColumn.DisplayMember = "State";
                newColumn.ValueMember = "State_id";
                dataGridViewRectangle.Columns.Insert(1, newColumn);
                newColumn.HeaderText = "State";
                newColumn.Name = "dgv_State";
                dataGridViewRectangle.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dataGridViewRectangle_EditingControlShowing);

2. DataGridView中的COMBOX绑定值

foreach (DataGridViewRow dgvRow in dataGridViewRectangle.Rows)
            {
                              LongLatInfoModel model = dgvRow.DataBoundItem as LongLatInfoModel;
                dgvRow.Cells[1].Value = model.lli_taskStateid;
             }

void dataGridViewRectangle_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            DataGridView dataGridView = (DataGridView)sender;
            if ((dataGridView.CurrentCell.GetType().Name == "DataGridViewComboBoxCell") && !isLoadChange )
            {
                ComboBox comboBox = (ComboBox)e.Control;
                comboBox.SelectionChangeCommitted += new EventHandler(comboBox_SelectedIndexChanged);
            }

            if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
            {
                DataGridViewComboBoxEditingControl cbo = e.Control as DataGridViewComboBoxEditingControl;
                cbo.DropDownStyle = ComboBoxStyle.DropDownList;
            }
             isLoadChange = true;

        }

 

3.当dataGridView中只有一行时，最后删除，有时会提示有索引-1没有值的异常，此时通过隐藏行代替删除时的解决办法，由于行中有comboBox，必须先清除comboBox中的选项，才能在列表中不显示该行，否则行还是显示，只是数据没有加载。

if (dataGridViewRectangle.Rows.Count == 1 && dgvRow.Index == 0)
                            {
                                cm.SuspendBinding();
                                dgvRow.Visible = false;
                                cm.ResumeBinding();
                                comboBox.DataSource = null;
                                comboBox.Items.Clear();

                            }
                            else
                            {

                                dataGridViewRectangle.Rows.Remove(dgvRow);
                                dataGridViewRectangle.Refresh();
                            }