Grid, OnCommand, RadWindow

[David Simmonds]

I handle the OnCommand client-side event for a Grid. I pull out the ID of the record of interest. Part of that record is a byte stream that contains the contents of a PDF file. The OnCommand handler calls radopen to display an aspx page:

            function RadGrid1_OnCommand(sender, eventArgs) {
                var nID = sender.get_masterTableView().get_dataItems()[0].getDataKeyValue("ID");
                var commandName = eventArgs.get_commandName();
                if (commandName == "PDF") {
                    var wnd = window.radopen("/ShowInvoicePDF.aspx?ID=" + nID, null);
                    return false;
                }
            }

The ShowInvoicePDF markup is just like the VS2010 wizard created it and I added nothing to it. I do this in the Page_Load method.

        protected void Page_Load(object sender, EventArgs e)
        {
            int nID = Convert.ToInt32(Request.QueryString["ID"]);
            Invoice invoice = Invoice.FindByID(nID);

            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();
            Response.Buffer = true;
            Response.ContentType = "Application/pdf";
            Response.AddHeader("Accept-Ranges", "bytes");
            Response.AddHeader("Accept-Header", invoice.PDFData.Length.ToString());
            Response.AddHeader("Cache-Control", "public");
            Response.AddHeader("Cache-Control", "must-revalidate");
            Response.AddHeader("Pragma", "public");
            Response.AddHeader("expires", "0");
            //Response.BinaryWrite(invoice.PDFData);
            Response.OutputStream.Write(invoice.PDFData, 0, invoice.PDFData.Length);
            //Response.Flush();
            //Response.Close();
            Response.End();
        }

When the webapp is run using IE 8 under Windows 7, the radwindow comes up but all I see is the rotating RadAjaxLoadingPanel wheel. If I use FireFox it works fine. If I run the ShowInvoicePDF.aspx file directly from the IE browser, it works fine, so there must be some kind of interaction with javascript/ajax/radwindow happening. Why is this happening (an answer of "because you are using MS IE" is not a valid response)? What do I need to do to make it work on all browsers?

[Daniel]

Hello David,

Please try the following code:

if (commandName == "PDF")
{
    var wnd = window.radopen("/ShowInvoicePDF.aspx?ID=" + nID, null);
    eventArgs.set_cancel(true);
}
...

Let me know whether this helps.

Regards,
Daniel
the Telerik team

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[David Simmonds]

That did not work. It still goes into wait mode spinning the wheel and never returns. I also tried putting return false; after the set_cancel line with no change in behaviour.

[David Simmonds]

Do you have any other ideas?

[Daniel]

Hello David,

Can you isolate the problem in a simple, runnable demo? I will debug it on my end and then provide more to-the-point suggestion.

Kind regards,
Daniel
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[David Simmonds]

The system would not let me attach a .zip file with the project. How can I send the sample project to you?

[Daniel]

Hello David,

You could attach the demo to a support ticket:
New Support ticket

Please provide a reference (link) to this forum thread.

Regards,
Daniel
the Telerik team

[David Simmonds]

A support ticket has been added.

[Daniel]

Hello David,

Thank you for taking the time to provide a runnable project. The problem is that due to browser limitations (in IE) you should always set ShowContentDuringLoad="true" in such scenarios.

Regards,
Daniel
the Telerik team