Danny,

Thanks very much for taking the time to answer.

Relevant snippets of code I have are:-
 
Sub TreeView_SelectedNodeChanged(ByVal sender As Object, ByVal e As EventArgs)
        SqlDataSource1.SelectParameters("IntRiskID").DefaultValue = LinksTreeView.SelectedNode.Value
End Sub

<asp:TreeView id="LinksTreeView"
       
        ForeColor="Blue"
        EnableClientScript="true"
        PopulateNodesFromClient="true" 
        OnTreeNodePopulate="PopulateNode"
        OnSelectedNodeChanged = "TreeView_SelectedNodeChanged"

        runat="server" Height="8px">
        
        <Nodes>
       
          <asp:TreeNode Text="Fleet-Wide Systems"
            SelectAction="Expand"
            ImageUrl = "Treeimages/BUnit.gif"
            PopulateOnDemand="True" Value="Fleet-Wide Systems"/>
           
        </Nodes>
       
      </asp:TreeView>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DLORiskWebConnectionString2 %>"
                            SelectCommand="SELECT * FROM [tblRisk] WHERE ([strBU] = @strBU)">
                            <SelectParameters>
                                <asp:Parameter DefaultValue="Fleet-Wide Systems" Name="strBU" Type="String" />
                            </SelectParameters>
                        </asp:SqlDataSource>

Any guidance and I would be very grateful

Calvin

Sub TreeView_SelectedNodeChanged(ByVal sender As Object, ByVal e As EventArgs)

SqlDataSource1.SelectParameters("IntRiskID").DefaultValue = LinksTreeView.SelectedNode.Value.ToString()

FormView1.DataBind()

End Sub

--
Calvin

Danny,

Problem now solved. Thank you for your advice and patience.

As you have probably gathered I'm new to asp dot net 2.0; quite new to dot net actually.

The mistake I made was to have created the Formview first so that when I bound it to the data source the treeview wasn't there to be linked to as a parameter. After your last post I decided to delete the formview altogether and start afresh and with your advice looked out for the parameter part. Fantastic to be able to link in this way. I'm so used to having to do everything in code hence my looking for the problem in the wrong place.

I have been using treeviews in VB for quite a long time and have enjoyed the functioality that this control has supplied. Up until VS 2005 I haven't really been able to replicate this functionality in a web environment. This has now changed and I thing VS 2005 is absolutely fantastic and really exciting.

Thanks once again for your time.

Calvin