public void GetPurchaseRequestInfo(Guid prID)
        {
            DataRow r = grn.GetGRNByPRID(prID);

            ddlItemType.SelectedValue = r["ItemTypeIDp"].ToString();
            BindItem(false);
            ddlItem.SelectedValue = r["ItemIDp"].ToString();
            txtQuantity.Text      = r["Quantityp"].ToString();
            txtPRNo.Text          = r["PRNo"].ToString();

            //if GRN is already exists and active
            if (r["ID"].ToString() != "" && r["Status"].ToString() != "0")
            {
                ViewState.Add("isEdit", true);
                ViewState.Add("GRNID", new Guid(r["ID"].ToString()));
                btnSave.Text = "Update";
                BindGRNInfo(r);
            }
        }