Adding treeview node at runtime

[Bluejay07]

Hello,

I have a treeview with several root nodes added at design time. I am trying to add another node at runtime, however, the node does not appear.

I only want this node to be available if the user is an administrator.

If g_bolAdmin Then
   tvwconfig.Nodes.Add("UserInfo", "User Information")
   'tvwconfig.Nodes("UserInfo").EnsureVisible()
End If

Could anyone help me as too why and how my new node does not appear?

Thanks.

 

[RiverGuy]

It looks fine to me. Are you sure you're getting a true for g_bolAdmin?

 

[Bluejay07]

Hi RiverGuy,

While I was testing, I had the if statements commented out so that the code would always execute. (I even placed breakpoints just to make sure.)

I'll keep trying.

 

[Bluejay07]

I think there is something wrong.

Before the above line is executed, by testing in the immediate window with tvwconfig.Nodes.Count I get 0. After the line is executed I get 1.

So it appears that the code is (somewhat) working, however, it doesn't seem to read the existing nodes. After the code is run, if I click on an existing node, they all display the proper information.

It seems like the new node I am trying to add is not being accepted into the current collection of nodes, but it want to start a new collection of its own.

Would anyone have more information that could help me sort this out?

Thanks.

 

[Bluejay07]

Well I still can't get it to work, so I wanted to try another approach but that isn't working either.

Since adding a new node to existing nodes isn't working and you can't set an individual node to invisible, I thought I would try to build the nodes during runtime. I deleted the node collection in design mode and tried the following code:

tvwconfig.Nodes.Clear()
tvwconfig.Nodes.Add("Connection", "Connection")
tvwconfig.Nodes.Add("Options", "Options").EnsureVisible()
tvwconfig.Nodes.Add("Security", "Security").EnsureVisible()
tvwconfig.Nodes.Add("UserInfo", "User Information").EnsureVisible()

At runtime, the treeview remains empty.

Essentially, all I want is not to display a certain node if the user doesn't have the appropriate permissions.

Can anymore provide some insight?

Thanks.

 

[TheVampire]

The two methods I have for adding a treenode would be like this:

tvwconfig.Nodes.Add(New TreeNode("Connection"))

or

Dim tn as TreeNode = tvwconfig.Nodes.Add("Connection")

 

[Bluejay07]

After receiving the post from TheVampire, I decided to try a few things.

I determined that the code for TheVampire and my original code does work. The problem is that I had

Dim tvwConfig as New Treeview

declared. Once commented out, everything worked.

Thanks for the responses.