How to download a file on RadContentMenuItem Click

[K]

I want to call a function that writes a file for download from a RadContextMenu.  The function works fine when I call it from a button click. But I can't call it from the server side OnContextMenuItemClick because the Response.End() call doesn't let the menu click finish (the load icon just keeps going).  So I am trying to intercept the menu click on the client side, cancel the event, and post the button click instead.  My breakpoint on javascript _doPostBack() gets hit,  my breakpoint on Page_Load gets hit, but my breakpoint on ButtonRptRpt_Click function does not.  Why not?

How can I download a file as a result of a RadMenuItem click? (Opening another browser tab is not an option.)

<telerik:RadTreeView ID="TreeViewBatchRules" runat="server" CheckBoxes="True"

    MultipleSelect="True" ToolTip="Right-click on nodes to see rule batch run menu."

    OnClientContextMenuItemClicking="TreeViewBatchRules_ClientContextMenuItemClicking"

    OnContextMenuItemClick="TreeViewBatchRules_ContextMenuItemClick">

    <DataBindings>

      <telerik:RadTreeNodeBinding Expanded="False" />

    </DataBindings>

    <ContextMenus>

      <telerik:RadTreeViewContextMenu ID="TreeViewBatchRulesContextMenu" runat="server">

        <Items>

          <telerik:RadMenuItem Value="Thing1" Text="Thing 1">    
             </telerik:RadMenuItem>
             <telerik:RadMenuItem Value="CreateReport" Text="Create Report">
             </telerik:RadMenuItem>

        </Items>

      </telerik:RadTreeViewContextMenu>

    </ContextMenus>

  </telerik:RadTreeView>

   

<!-- works fine on button click --> 

<asp:Button ID="ButtonRunRpt" runat="server" Text="Run Report" OnClick="ButtonRunRpt_Click" />

function TreeViewBatchRules_ClientContextMenuItemClicking(sender, eventArgs) { 

    var node = eventArgs.get_node();

    var item = eventArgs.get_menuItem();

    var menu = item.get_menu();   

 

    if (item.get_text() == "Create Report"){

        eventArgs.set_cancel(true);

        var ruleId = node.get_value();

 

        // the postback gets called but doesn't "arrive" at the ButtonRunRpt_Click

        var btnId = "<%=ButtonRunRpt.ClientID %>"

        __doPostBack(btnId, '');

    }           

}

protected void TreeViewBatchRules_ContextMenuItemClick
                  (object Sender,
                       Telerik.Web.UI.RadTreeViewContextMenuEventArgs e)
{
    int ruleId = int.Parse(TreeViewBatchRules.CheckedNodes[0].Value);

    switch (e.MenuItem.Value)
    {
       case "Thing1" : ... break;
       case "CreateReport" : BuildReport(ruleId); break; // load icon won't go away; file doesn't download
    }
}


protected void ButtonRunRpt_Click(object Sender,
                                  EventArgs e)
{
    int ruleId = int.Parse(TreeViewBatchRules.CheckedNodes[0].Value);
    BuildReport(nodeId);
}

private void BuildReport(int nodeId)
{
    var ms = GetReport(ruleId);

    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.Buffer = true;
    HttpContext.Current.Response.ContentType = "application/pdf";
    HttpContext.Current.Response.AddHeader("Content-disposition", "attachment; filename='myReport.pdf'");

    Response.BinaryWrite(ms);

    HttpContext.Current.Response.Close();
    HttpContext.Current.Response.End();
}

[K]

I posted this as a support ticket once I realized that was the better option for me.  Sorry for the duplication.

[Nencho]

Hello,

I have already replied to your question in the support ticket, which is why, I would ask you to continue the correspondence in the other thread.

Than you!

Regards,
Nencho
Telerik by Progress