protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
//********************************************
base.Render(writer);//调用基类的函数据输出数据
//********************************************
}
{
//********************************************
base.Render(writer);//调用基类的函数据输出数据
//********************************************
}
调用的时候:private void Form1_Load(object sender, System.EventArgs e)
{
MyDatagrid a = new MyDatagrid();
a. //.后面可供选择的函数还是只有PreProcessMessage
}类的代码:
using System;
namespace delete
{
public class MyDatagrid:DataGrid
{
public override bool PreProcessMessage( ref Message msg )
{
Keys keyCode = (Keys)(int)msg.WParam & Keys.KeyCode;
if(msg.Msg == WM_KEYDOWN && keyCode == Keys.Delete)
{
if(MessageBox.Show("Delete this row?", "", MessageBoxButtons.YesNo) == DialogResult.No)
return true;
}
return base.PreProcessMessage(ref msg);
}
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
base.Render(writer);//调用基类的函数据输出数据
}
}
另外你至少还应包含DataGrid所在的命名空间,如:
using System.Data;