Bug: Treelist crashes w3wp.exe

[Ed Lance]

I have a pag with the TreeList on it.  I added the following code to the code behind:

Protected Sub RadTreeList1_DataBound(sender As Object, e As System.EventArgs) Handles RadTreeList1.DataBound
    RadTreeList1.ExpandAllItems()

End Sub

And when I ran the page from VS 2010, I got an error message:

Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7afa2

Faulting module name: nlssorting.dll, version: 4.0.30319.239, time stamp: 0x4e182039

Exception code: 0xc00000fd

Fault offset: 0x0000000000001e4e

Faulting process id: 0x1900

Faulting application start time: 0x01cc9db854916354

Faulting application path: c:\windows\system32\inetsrv\w3wp.exe

Faulting module path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\nlssorting.dll

Report Id: 93fd70b4-09ab-11e1-8d6d-1cc1de54a95b

Took the code back out and the error went away.  Put the code back in, error msg.
I realize that the Databound event might not be the right place for that code but it should never crash w3wp.exe

[Radoslav]

Hi Ed,

Please try using the following code snippet and let me know if the issue still persists:

protected void Page_Load(object sender, EventArgs e)
  {
      if (!Page.IsPostBack)
      {
          RadTreeList1.ExpandAllItems();
      }
  }

Looking forward for your reply.

Greetings,
Radoslav
the Telerik team

[Ed Lance]

That stops the crash from happening, thanks.

Still, this is a pretty serious bug.  The user should never be able to put code in a page that crashes w3wp.exe.

[Radoslav]

Hello Ed,

The described behavior is not a bug, it is expected when you call ExpandAllItems() method on RadTreeList1_DataBound event. The ExpandAllItems explicitly calls DataBind() of the RadTreeList in order to populate its child items' data. So with calling ExpandAllItems on RadTreeList1_DataBound you make an infinite loop and this crashes the w3wp.exe.

All the best,
Radoslav
the Telerik team