Adding a node to a treeview on a different form...

Okay, i have 2 forms. Im looking to create a seperate form that a user can enter the name of the node as. I have this

Code:

---

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        user = TextBox1.Text
        Dim newnode As TreeNode = New TreeNode(user)
        forms.myform1.TreeView1.SelectedNode.Nodes.Add("test")
        forms.myform2.Hide()
    End Sub

---

the show/hide form2 works, but i get this for the treeview:
Additional information: Object reference not set to an instance of an object.

I think it's making that error because you are creating the treeview node on the form1 , though you want it to be created on form2 for example . One solution (I've not tried this) I might think of is to create one or array of treeview nodes on form2 , when you need them , they are there . Just pass the string the user will enter . I dunno if this will work for you but it's worth a try .

i want the node too be created on form one. form 2 is naming the node

You need to point to your instance of Form1. So that instance has to be accessilbe by Form2 either by having the instance as a global variable or passing the instance to Form2 via the new method.

Yes, ive tried that, but that means i have to show a new form 1

The easiest and best way is to either have the child form return a treenode to the main form for call a method on the main form that does the actual creating. You could do this via a delegate or just a public method.

hmmm... could you explain that a little bit? im still a bit new to .net

Here is an example of both ways with explanation in the code notes.

hmmm... i cant seem to open it in vb, i have unzipped it

I think you might need VS.NET 2003, since I think thats what Edneesis is using.

Yes that is what I am using, but if you have VS 2002 then you can convert it back to 2002. Someone has a link to the converter in their signature, Pirate maybe?

Yes its in his signature as 'Utility to Convert Visual Studio.NET 2003 Project Files' or here I'll cut and paste it for ya:

http://www.codeproject.com/useritems/VSConvert.asp

There isn't anything in the project that will be different in 2002.