Datagrid checkbox check/uncheck

       <script type="text/javascript" language="javascript">

           function CheckGrid(source) {
               var isChecked = source.checked;
               $("#chkGrid input[id*='chkSelect']").each(function (index) {
                   $(this).attr('checked', false);
               });
               source.checked = isChecked;
               
           }

</script>


<asp:TemplateField HeaderText="Check">
                                <ItemTemplate>
                                    <asp:CheckBox ID="chkSelect" runat="server" onclick="CheckGrid(this);" />
                                </ItemTemplate>
                            </asp:TemplateField>

rivate void DisableCheckboxColumnInRow(DataGridRow row)
{
    var checkBoxColumn = Datagrid1.Columns[0];
    var checkBoxCell = GetCell(checkBoxColumn, row);
    checkBoxCell.IsEnabled = false;
}

private static DataGridCell GetCell(DataGridColumn column, DataGridRow row)
{
    var cellContent = column.GetCellContent(row);
    return (DataGridCell)cellContent.Parent;
}