Question How add treenode to an existing Treeview from code?

[raysefo]

Hello,

I have a treeview like below, and i would like to add treenodes according to result of a select query. Is there a way to do it?

Thanks in advance.


Best Regards

<asp:TreeView ID="TreeView1" runat="server" CssClass="Menu" EnableTheming="True">
                    <HoverNodeStyle CssClass="HoverNode_content" />
                    <Nodes>
                        <asp:TreeNode Text="Yeni Talep Oluştur" Value="Yeni Talep Oluştur">
                            <asp:TreeNode NavigateUrl="~/izintalep.aspx" Text="Izin Talep Formu" Value="Izin Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/isavansi.aspx" Text="İş Avansı Talep Formu" Value="İş Avans Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/kreditalep.aspx" Text="Kredi Talep Formu" Value="Kredi Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/egitimtalep.aspx" Text="Eğitim Talep Formu" Value="Eğitim Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/fazlamesai.aspx" Text="Fazla Mesai Talep Formu" Value="Fazla Mesai Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/maasavansi.aspx" Text="Maaş Avansı Talep Formu" Value="Maaş Avansı Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/masraftalep.aspx" Text="Masraf Talep Formu" Value="Masraf Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/personeltalep.aspx" Text="Personel Talep Formu" Value="Personel Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/vekalettalep.aspx" Text="Vekalet Talep Formu" Value="Vekalet Talep Formu">
                            </asp:TreeNode>
                            <asp:TreeNode NavigateUrl="~/seyahattalepveavans.aspx" Text="Seyahat Talep ve Avans Formu"
                                Value="Seyahat Talep ve Avans Formu"></asp:TreeNode>
                        </asp:TreeNode>
                        <asp:TreeNode Text="Taleplerim" Value="New Node" NavigateUrl="~/requests.aspx"></asp:TreeNode>
                        <asp:TreeNode Text="Onayladıklarım" Value="New Node" NavigateUrl="~/approveds.aspx">
                        </asp:TreeNode>
                        <asp:TreeNode Text="Onay Bekleyenler" Value="New Node" NavigateUrl="~/pendingApproval.aspx">
                        </asp:TreeNode>
                    </Nodes>
                    <NodeStyle CssClass="DefaultNode_content" />
                    <SelectedNodeStyle CssClass="SelectedNode_content" />
                </asp:TreeView>

 

[kulrom]

I am not sure what exactly you need but to add a new TreeNode you can use the following code:

TreeView1.Nodes(2).ChildNodes.Add(New TreeNode("Text here", "Value here"))

this will add a new child node under Onayladıklarım

 

[raysefo]

Thanks in advance, let me try it

 

[raysefo]

kulrom,

it works but in which event should i put it? Obviously it does not work in page_load.

 

[kulrom]

Please explain the statement "it does not work". Does it work partially? Do you have another code in the load as well? Do you check for postback?
Maybe it's best if you post the full Load event code?

 

[raysefo]

Here is the Page_Load ;

Sub Page_Load(ByVal Sender As Object, ByVal e As EventArgs)

Dim manager As String = Session("user").ToString

TreeView1.Nodes(2).ChildNodes.Add(New TreeNode("İş Avans Talepleri", "Value here"))
TreeView1.Nodes(1).ChildNodes.Add(New TreeNode("İş Avans Talepleri", "Value here"))


If GetPendingApprovals(manager) > 0 Then
TreeView1.Nodes(3).Text = "Onay Bekleyenler (" & GetPendingApprovals(manager) & ")"

End If
If GetApproved(manager) > 0 Then
TreeView1.Nodes(2).Text = "Onayladıklarım (" & GetApproved(manager) & ")"

End If
If GetRequests(manager) > 0 Then
TreeView1.Nodes(1).Text = "Taleplerim (" & GetRequests(manager) & ")"

End If


End Sub

 

[kulrom]

Ok but what really does not work here?
Beside that it seems that this code should be executed only once so i would add an If statement checking if it's Not a Postback.
If Not IsPostback Then

' your code here

End If