为datagrid中加入全选功能

 页面如图：

在datagrid中增加模板列，然后编辑模板，加入checkbox控件。

后台代码如下：

  //操作按钮
    protected void Button16_Click(object sender, EventArgs e)
    {
      
        CheckBox chkbox;
        for (int i = 0; i < DataGrid2.Items.Count; i++)
        {
            chkbox = (CheckBox)DataGrid2.Items[i].FindControl("CheckBox1");
            if (chkbox.Checked ==true)
            {
                Response.Write("此处放您要对选中的条目执行的操作");
            }
            else
            {
                Response.Write(i);
            }
        }
    }
    //全选复选框
    protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chkbox;
        if (CheckBox2.Checked == true)
        {
            for (int i = 0; i < DataGrid2.Items.Count; i++)
            {
                chkbox = (CheckBox)DataGrid2.Items[i].FindControl("CheckBox1");
                chkbox.Checked = true;
            }
        }
        else
        {
            for (int i = 0; i < DataGrid2.Items.Count; i++)
            {
                chkbox = (CheckBox)DataGrid2.Items[i].FindControl("CheckBox1");
                chkbox.Checked = false;
            }
        }
    }