We would like use the expandbuttonclicked event (+/-) to save the id (tag) of a shape node (in the imagemap mode) in a session variable, but we get alway errors:

Compiler Error Message: BC30590: Event 'ExpandButtonClicked' cannot be found.

Source Error:

Sub diagramView_ExpandButtonClicked(ByVal sender As Object, ByVal e As NodeEventArgs) Handles diagramView.ExpandButtonClicked

If Not e.Node.Tag Is Nothing Then Session("Toggle") = e.Node.Tag

End Sub

the html code of the page contains:

<form id="Form1" method="post" runat="server">
  <p align="left">
  <ndiag:DiagramView id="diagramView" runat="server" width="1800px" height="1200px" clientsidemode="ImageMap" OnExpandButtonClicked="diagramView_ExpandButtonClicked">
  <diagram backbrush="s:#FFFFFFFF" /></ndiag:DiagramView>
  </p>

Whats wrong?

Is there another possibility to get the node.tag on the server side?

We use vb.net (asp.net 2.0)

thanks and regards
chris