void gv_CustomRowCellEditForEditing(object sender, CustomRowCellEditEventArgs e)
{
xCol xc;
if (ListCols.TryGetValue(e.Column.AbsoluteIndex, out xc))
{
((BindingSource)xc.rle.DataSource).DataMember = string.Empty;
((BindingSource)xc.rle.DataSource).DataSource =
xc.GetSrcHandler(eColl.GetParent());
}
}
