private void GetIncomeReport() { ShoppingCart k = new ShoppingCart() { Flag=Convert.ToInt32(rblIncomeFilter.SelectedValue) }; DataTable dt=k.GetIncomeReport(); if(dt.Rows.Count>0) { gvIncomeReport.Visible=true; gvIncomeReport.DataSource=dt; gvIncomeReport.DataBind(); object ProductSold; ProductSold=dt.Compute("Sum(TotalProducts)" , "" ); object TotalIncome; TotalIncome=dt.Compute("Sum(TotalPrice)" , "" ); }else { gvIncomeReport.Visible = false; lblIncome.Text = "No Products Income"; } }