I dont want my treeview control to postback if its SelectedNode not Changed. i mean; if you click over the selected item i dont want it to postback. how can i handle this. thanks for your help.

Hi,

with code like this, for example

    ''' <summary>
    ''' To store the path of last selected node
    ''' </summary>
    ''' <value></value>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Private Property LastSelectedNodeValuePath() As String
        Get
            Dim ret As String = ""
            If Not ViewState("LastSelectedNodeValuePath") Is Nothing Then
                ret = ViewState("LastSelectedNodeValuePath")
            End If
            Return ret
        End Get
        Set(ByVal value As String)
            ViewState("LastSelectedNodeValuePath") = value
        End Set
    End Property

    Protected Sub TreeView1_SelectedNodeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles TreeView1.SelectedNodeChanged
        'Change the select action of the last selected node
        If LastSelectedNodeValuePath <> "" Then
            TreeView1.FindNode(LastSelectedNodeValuePath).SelectAction = TreeNodeSelectAction.Select
        End If

        'Set the current selected node
        LastSelectedNodeValuePath = TreeView1.SelectedNode.ValuePath

        'Set current selected node's select action
        TreeView1.SelectedNode.SelectAction = TreeNodeSelectAction.None

    End Sub

---

Thanks,

Teemu Keiski
Finland, EU

Hi, Thanks !!! it worked. :)
Here is the C# version that i used.

private string LastSelectedNodeValuePath
    {
        get
        {
            string ret = "";
            if (ViewState["LastSelectedNodeValuePath"] != null)
            {
                ret = ViewState["LastSelectedNodeValuePath"].ToString();
            }
            return ret;
        }
        set
        {
            ViewState["LastSelectedNodeValuePath"] = value;
        }
    }

protected void TreeView_cat_SelectedNodeChanged(object sender, EventArgs e)
    {
        //Change the select action of the last selected node
        if (LastSelectedNodeValuePath != "")
        {
            TreeView_cat.FindNode(LastSelectedNodeValuePath).SelectAction = TreeNodeSelectAction.Select;
        }
        //Set the current selected node
        LastSelectedNodeValuePath = TreeView_cat.SelectedNode.ValuePath;

        //Set current selected node's select action
        TreeView_cat.SelectedNode.SelectAction = TreeNodeSelectAction.None;
         ...
    }