[Solved] RadCombobox after Response.BinaryWrite

[Markus]

Hello!

I have a page with multiple RadComboboxes on it. The Datasources of the comboboxes are set in the Page_Load event.

On the same page i have a button that downloads a pdf document.
After clicking this button the comboboxes do not open anymore.

the button triggers a post back and the following code is executed:
########################
byte[] export = //Code to generate pdfDocument
            Response.ContentType = "application/pdf";
            Response.AddHeader("Content-Disposition", "attachment; filename=test.pdf \"");
            Response.BinaryWrite(export);
            Response.Flush();
            Response.End();
########################

what is going wrong?

thanks in advance
Markus

[Rosi]

Hi Markus,

Please read our kb article - How to use RadToolBar dropdown button with file output.

This article is for RadToolBarButton, but the same approach can be used with RadComboBox.

Another way to workaround the problem is the following approach:
.
1.Add a script reference to the ScriptManager

    <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Scripts>
                <asp:ScriptReference Path="InitScript.js" />
            </Scripts>
        </asp:ScriptManager>

2.Override setIsInPostBack method of RadComboBox in the following way:
InitScript.js

// Hook up Application event handlers.
var app = Sys.Application;
app.add_init(ApplicationInit);

function ApplicationInit(sender) {
Telerik.Web.UI.RadComboBox.prototype.setIsInPostBack = function(isInPostBack)
{
}
}

Regards,
Rosi
the Telerik team

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