Insert a checkbox single selection in the DataGrid header to define it as full selection and implement full selection of the checkbox before each row of data in the entire DataGrid

Write the following in the time when the DataGrid is bound:Code:
If (E. Item. itemtype = listitemtype. header)
{
Checkbox chk = (checkbox) E. Item. findcontrol ("chkallserver ");
// Add a departure event to the checkbox in the header
Chk. checkedchanged + = new eventhandler (chk_checkedchanged );
}

Private void chk_checkedchanged (Object sender, system. eventargs E)
{
Checkbox chk = This. getheadercheckbox (this. datagrid1 );
Foreach (maid I in this. Maid)
{
Checkbox inchk = (checkbox) I. findcontrol ("chkdelserver ");
Inchk. Checked = chk. checked;
}
}
// Get the checkbox object of the question header of the specified DataGrid
Private checkbox getheadercheckbox (DataGrid GRD)
{
Checkbox chk = NULL;
Foreach (maid I in GRD. controls [0]. Controls)
{
If (I. itemtype = listitemtype. header)
{
Chk = (checkbox) I. findcontrol ("chkallserver ");
Break;
}
}
Return chk;
}