Export to pdf with DNN

[Tim]

I've got a radgrid in a dnn module/user control and I want to add exporting to pdf. The module is ajax enable via dnn and I'm pretty sure my problem is related to not doing a full postback. Nothing happens when you click the export to pdf button. I'm trying to register the export to pdf button to postback on the page load with no luck. For some reason I can't find the control.

Any help is appreciated, thanks.

protected void Page_Load(System.Object sender, System.EventArgs e)
{
    RadGrid InventoryGrid = (RadGrid)InventoryRadGrid;
    Control pdfExportButton = (Control)InventoryRadGrid.MasterTableView.FindControl("ExportToPdfButton");
    if (pdfExportButton != null)
        ScriptManager.GetCurrent(Page).RegisterPostBackControl(pdfExportButton);
    else messageLabel.Text = "Export to PDF Control Not Found";
    if (!IsPostBack)
    {
    }
}

[Daniel]

Hello Tim,

Due to the fact that the items in RadGrid are naming containers, you have to use the FindControl method on the item itself. Sample code:

GridItem gitem = RadGrid1.MasterTableView.GetItems(GridItemType.CommandItem)[0];
item.FindControl("...")....;

Alternative approach would be to use client-side code for canceling the async request:

Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(initializeRequestHandler);
function initializeRequestHandler(sender, args)
{
    if (args.get_postBackElement().id.indexOf("EXPORT_CONTROL_ID") != -1)
    {
        args.set_cancel(true);
        sender._form["__EVENTTARGET"].value = args.get_postBackElement().id.replace(/\_/g, "$");
        sender._form["__EVENTARGUMENT"].value = "";
        sender._form.submit();
        return;
    }
}

Best regards,
Daniel
the Telerik team

[Tim]

Thanks for information Daniel. I had to set this aside for a few weeks and I just got back to it. In case anyone else is trying to figure this out the FindControl approach doesn't work during page load on the server side.  I was getting an error message: "Index was outside the bounds of the array". I'm pretty sure the radGrid hasn't been created when the page load starts. 

The client-side code did work. Just changed  "EXPORT_CONTROL_ID" to the name of your control.

Thanks.

[Daniel]

Hello Tim,

Thank you for sharing the solution with our community. Let me know if you need further assistance.

Regards,
Daniel
the Telerik team