protected void DuyurularSliderGrid_RowDeleting(object sender, DevExpress.Web.Data.ASPxDataDeletingEventArgs e)
{
int rowindex = DuyurularSliderGrid.FindVisibleIndexByKeyValue(e.Keys[DuyurularSliderGrid.KeyFieldName]);
ASPxGridView grid = (ASPxGridView)sender;
var id = grid.GetRowValues(rowindex, "ID").ToString();
db.D_DuyurularSlider(Convert.ToInt32(id));
e.Cancel = true;
grid.CancelEdit();
GridUpdating();
}