DataGrid控件在后台的设置全选 删除 的代码控制

       protected void but_全选_Click(object sender, System.EventArgs e)
        {
            System.Web.UI.WebControls.CheckBox chkbExport;
            foreach (DataGridItem oDataGridItem in DataGrid1.Items)
            {
                chkbExport = (CheckBox)oDataGridItem.FindControl("chkbExport");
                chkbExport.Checked = true;
            }
        }

        protected void but_反选_Click(object sender, System.EventArgs e)
        {
            System.Web.UI.WebControls.CheckBox chkbExport;
            foreach (DataGridItem oDataGridItem in DataGrid1.Items)
            {
                chkbExport = (CheckBox)oDataGridItem.FindControl("chkbExport");
                if (chkbExport.Checked)
                    chkbExport.Checked = false;
                else
                    chkbExport.Checked = true;
            }
        }

        protected void but_删除_Click(object sender, System.EventArgs e)
        {
            System.Web.UI.WebControls.CheckBox chkbExport;
            System.Collections.ArrayList list = new ArrayList();
            foreach (DataGridItem oDataGridItem in DataGrid1.Items)
            {
                chkbExport = (CheckBox)oDataGridItem.FindControl("chkbExport");
                if (chkbExport.Checked)
                {
                    string id = ((HtmlInputHidden)oDataGridItem.FindControl("ID")).Value.ToString();
                    list.Add(id);
                }
            }
            if (proc.DeleteAll(list))
            {
                Page.RegisterStartupScript("start", "<script>alert('删除成功')</script>");
            }
            else
            {
                Page.RegisterStartupScript("start", "<script>alert('删除失败')</script>");
            }
            Bind();
        }