private void AddPurch_Load(object sender, EventArgs e)
{
var BookIDs = string.Join(",", CartPointer.Select(x => x.ToString()).ToArray());
if (String.IsNullOrEmpty(BookIDs))
{
DataTable dt = new DataTable();
BuyGridView.DataSource = dt;
BuyGridView.Refresh();
PriceLabel.Text = "0";
return;
}
var BookIDStr = "( " + BookIDs + " )";
DataTable DisplayTable = ControlObj.DisplayCart(BookIDStr);
string TotalSalePrice = Convert.ToString(DisplayTable.Compute("Sum(Price)", ""));
PriceLabel.Text = TotalSalePrice;
BuyGridView.DataSource = DisplayTable;
BuyGridView.Refresh();
}