public void FillMonthSale()
{
Object SaleMonth = new Object();
SaleMonth.Year = DdlYear1.SelectedValue;
SaleMonth.Month = DdlMonth.SelectedValue;
DataTable dt = BSLAYER.MonthSale(SaleMonth);
GridView2.DataSource = dt;
GridView2.DataBind();
DdlYear1.ClearSelection();
DdlMonth.ClearSelection();
}