RadGrid OnItemCommand Event Still Running after Response.End();

[Giuliano Caetano]

Hi Telerik team

I have a RadGrid with the a GridButtonColumn like below

<telerik:GridButtonColumn UniqueName="DeliveryNote" CommandName="DeliveryNote"
    ImageUrl="~/Content/Images/16/notes.png" ButtonType="ImageButton" Text="<%$ Resources:Resource, GridItemEditDeliveryNoteToolTip %>">
</telerik:GridButtonColumn>

CodeBehind:

protected void RadGridDeliveryNotesOnItemCommand(object sender, GridCommandEventArgs e)
{
    var gridDataItem = e.Item as GridDataItem;
    if (!ReferenceEquals(gridDataItem, null))
    {
        var idDeliveryNote = Convert.ToInt32(gridDataItem.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["Id"]);
        if (e.CommandName == RadGrid.DeleteCommandName)
        {
             BL.Domain.DeliveryNote.Instance.DeleteById(idDeliveryNote);
        }

        if (e.CommandName == "DeliveryNote")
        {
            Response.Redirect(string.Format("Processor.ashx?idDeliveryNote={0}", idDeliveryNote), true);
        }
    }
}

.ashx

public class Processor : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        var idDeliveryNote = context.Request.ProcessQueryString("idDeliveryNote");

        var report = new Reports.DeliveryNote();
        report.ReportParameters["IdDeliveryNote"].Value = idDeliveryNote;

        context.Response.Clear();
        context.Response.Buffer = true;
        context.Response.ClearHeaders();
        context.Response.ClearContent();

        var reportProcessor = new ReportProcessor();

        var pdfResult = reportProcessor.RenderReport("PDF", report, null);
        var file = pdfResult.DocumentBytes;

        context.Response.ContentType = "application/pdf";

        context.Response.Charset = string.Empty;
        context.Response.AddHeader("Content-Length", file.Length.ToString(CultureInfo.CurrentCulture));
        var attachment = string.Format("attachment; filename={0}.{1}", "file-name", "pdf");
        context.Response.AddHeader("content-disposition", attachment);

        var bytes = file;
        context.Response.BinaryWrite(bytes);
        context.Response.End();
    }
}

The problem is, The loading pannel over RadGrid, still running after the file exported.
Can you help me with this issue.

Thanks
Giuliano

[Maria Ilieva]

Hi Giuliano,

Please note that using "Response.Write" with async postback is not a supported scenario and this is MS Ajax framework limitation. I suppose that the ajax request has break due to this method and therefore the LoadingPanel could not hide. Please try to disable the ajax on this specific button click and verify if this helps.

Regards,
Maria Ilieva
the Telerik team