JQGrid export using SelectPDF, no data in linked JQGrid - asp.net

Question

I have 2 JQGrids on my ASPX page. When an Invoice is selected on the top grid, it loads the corresponding data on the second.
My issue is with exporting. When I export the page using SelectPDF, the 2nd Grid View is always empty.
Here is what it looks like on the page:
...and this is what the exported PDF looks like, there is no data in the second grid.
Here is the ASPX code:
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" Inherits="Invoicing" Codebehind="Invoicing.aspx.cs" EnableEventValidation="false" %>
<%# Register Assembly="Trirand.Web" TagPrefix="trirand" Namespace="Trirand.Web.UI.WebControls" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<link href="themes/CustomStyles.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" type="text/css" media="screen" href="themes/jquery-ui.css" />
<link rel="stylesheet" type="text/css" media="screen" href="themes/ui.jqgrid.css" />
<script src="js/jquery.min.js" type="text/javascript"></script>
<script src="js/trirand/i18n/grid.locale-en.js" type="text/javascript"></script>
<script src="js/trirand/jquery.jqGrid.min.js" type="text/javascript"></script>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Indigo2.Properties.Settings.Constr %>"
SelectCommand="SELECT [invoice_number],[invoice_date],[custid],[inv_splitter] FROM [Indigo].[dbo].[invoices]" CancelSelectOnNullParameter="false"
UpdateCommand=""
DeleteCommand="">
<UpdateParameters>
<asp:Parameter Name="invoice_number" Type="Int32" />
<asp:Parameter Name="invoice_date" Type="DateTime" />
<asp:Parameter Name="custid" Type="String" />
<asp:Parameter Name="inv_splitter" Type="String" />
</UpdateParameters>
<DeleteParameters>
</DeleteParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:Indigo2.Properties.Settings.Constr %>"
SelectCommand="SELECT [inv_item_id],[description],[unit_sell],[qty],[inv_section],[inv_orderby],[inv_splitter],[ref_date_start],[ref_date_end],[custid],[cust_po],[invoice_number], unit_sell * qty as Price FROM [Indigo].[dbo].[invoice_items] WHERE (invoice_number = #invoice_number) " CancelSelectOnNullParameter="false"
UpdateCommand="UPDATE Invoice_items SET cust_po=#cust_po, description=#description, ref_date_start=CONVERT(datetime, #ref_date_start, 105), ref_date_end=CONVERT(datetime, #ref_date_end, 105), unit_sell=#unit_sell, qty=#qty WHERE inv_item_id=#inv_item_id"
DeleteCommand="DELETE FROM Invoice_items WHERE inv_item_id=#inv_item_id">
<SelectParameters>
<asp:Parameter DefaultValue="" Name="invoice_number" Type="Int32" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="inv_item_id" Type="Int32" />
<asp:Parameter Name="cust_po" Type="String" />
<asp:Parameter Name="description" Type="String" />
<asp:Parameter Name="ref_date_start" Type="DateTime" />
<asp:Parameter Name="ref_date_end" Type="DateTime" />
<asp:Parameter Name="unit_sell" Type="Decimal" />
<asp:Parameter Name="qty" Type="Int32" />
</UpdateParameters>
<DeleteParameters>
<asp:Parameter Name="inv_item_id" Type="Int32" />
<asp:Parameter Name="cust_po" Type="String" />
</DeleteParameters>
</asp:SqlDataSource>
<asp:UpdatePanel runat="server" ID="UpdatePanel1">
<ContentTemplate>
<br />
<trirand:JQGrid runat="server" ID="JQGrid1" DataSourceID="SqlDataSource1" Width="1200"
OnRowSelecting="JQGrid1_RowSelecting">
<Columns>
<trirand:JQGridColumn DataField="invoice_number" HeaderText="ID" PrimaryKey="True" Width="100" />
<trirand:JQGridColumn DataField="invoice_date" Editable="true" DataFormatString="{0:d}" Width="100"/>
<trirand:JQGridColumn DataField="custid" Editable="true" Width="100"/>
</Columns>
<ToolBarSettings ShowEditButton="true" ShowRefreshButton="True" ShowAddButton="true" ShowDeleteButton="true" ShowSearchButton="True" />
</trirand:JQGrid>
<br />
<trirand:JQGrid runat="server" ID="JQGrid2" DataSourceID="SqlDataSource2" Width="1200" Height="100%" maxHeight="300" hidegrid="true" ondatarequested="JQGrid2_DataRequested">
<Columns>
<trirand:JQGridColumn CSSClass="indent" DataField="description" Editable="true" Width="800"/>
<trirand:JQGridColumn DataField="inv_section" Editable="true" />
<trirand:JQGridColumn DataField="ref_date_start" Editable="true" DataFormatString="{0:d}" Width="200"/>
<trirand:JQGridColumn DataField="ref_date_end" Editable="true" DataFormatString="{0:d}" Width="200"/>
<trirand:JQGridColumn DataField="cust_po" Editable="true" />
<trirand:JQGridColumn DataField="unit_sell" Editable="true" DataFormatString="{0:c}" Width="200"/>
<trirand:JQGridColumn DataField="qty" Editable="true" Width="200"/>
<trirand:JQGridColumn DataField="price" Editable="false" DataFormatString="{0:c}" Width="200" >
</trirand:JQGridColumn>
</Columns>
<PagerSettings PageSize="12" />
<GroupSettings CollapseGroups="false">
<GroupFields>
<trirand:GroupField
DataField="inv_section"
HeaderText="<b>{0}</b>"
GroupSortDirection="Asc"
ShowGroupColumn="false"
ShowGroupSummary="true"/>
<trirand:GroupField
DataField="cust_po"
HeaderText="PO Reference: <b>{0}</b&gt"
GroupSortDirection="Asc"
ShowGroupColumn="false"
ShowGroupSummary="false"/>
</GroupFields>
</GroupSettings>
<AppearanceSettings ShowFooter="true" />
<ToolBarSettings ShowEditButton="true" ShowRefreshButton="True" ShowAddButton="true" ShowDeleteButton="true" ShowSearchButton="True" />
</trirand:JQGrid>
</ContentTemplate>
</asp:UpdatePanel>
<asp:Button runat="server" ID="ExportToPDFButton" Text="Export to PDF" OnClick="BtnCreatePdf_Click" />
...and here is the underlying code
using System;
using System.Web.UI;
using Trirand.Web.UI.WebControls;
using System.IO;
using System.Data;
using SelectPdf;
using System.Web;
public partial class Invoicing : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
JQGrid2.Visible = true; //was false!!!!!!!!!!!!!!
if (Session["invoice_number"] != null)
{
JQGrid2.Visible = true;
SqlDataSource2.SelectParameters["invoice_number"].DefaultValue = Session["invoice_number"] as string;
}
}
protected void JQGrid2_DataRequested(object sender, Trirand.Web.UI.WebControls.JQGridDataRequestedEventArgs e)
{
DataTable dt = e.DataTable; // get only the current page data
double poTotal = 0;
foreach (DataRow row in dt.Rows)
{
double poValue = (double)row["price"];
poTotal += poValue;
}
string formattedMoneyValue = String.Format("{0:C}", poTotal);
JQGrid2.Columns.FromDataField("price").FooterValue = formattedMoneyValue.ToString();
JQGrid2.Columns.FromDataField("qty").FooterValue = "Total:";
}
protected void JQGrid1_RowSelecting(object sender, Trirand.Web.UI.WebControls.JQGridRowSelectEventArgs e)
{
Session["invoice_number"] = JQGrid1.SelectedRow;
JQGrid2.Visible = true;
SqlDataSource2.SelectParameters["invoice_number"].DefaultValue = Session["invoice_number"] as string;
}
//Start of Select PDF Code//
private bool startConversion = false;
protected void BtnCreatePdf_Click(object sender, EventArgs e)
{
startConversion = true;
}
protected override void Render(HtmlTextWriter writer)
{
if (startConversion)
{
Session["invoice_number"] = JQGrid1.SelectedRow;
JQGrid2.Visible = true;
SqlDataSource2.SelectParameters["invoice_number"].DefaultValue = Session["invoice_number"] as string;
// get html of the page
TextWriter myWriter = new StringWriter();
HtmlTextWriter htmlWriter = new HtmlTextWriter(myWriter);
base.Render(htmlWriter);
// instantiate a html to pdf converter object
HtmlToPdf converter = new HtmlToPdf();
// create a new pdf document converting the html string of the page
PdfDocument doc = converter.ConvertHtmlString(
myWriter.ToString(), Request.Url.AbsoluteUri);
// save pdf document
doc.Save(Response, false, "Sample.pdf");
// close pdf document
doc.Close();
}
else
{
// render web page in browser
base.Render(writer);
}
}
}
Please can someone help me, with what I need to do so that the data from the second grid is passed to the PDF when exported.
UPDATE:
If I hardcode the default value for the datasource on the second grid it exports the correct info.
<SelectParameters>
<asp:Parameter DefaultValue="1000" Name="invoice_number" Type="Int32" />
</SelectParameters>
For some reason when I export, it seems to be clearing this parameter value, if I set it dynamically.

Answer 1

The SelectPdf convert loads your web page using a new Session, so it does not know your dynamically set parameters. You need to send them in the url, if possible.