Moving to top of TreeView after ExpandAll()

[lhasha]

Greetings:

I am trying to move to the top of my TreeView control after expanding all. This means that I should see the highlighted node (0) after the ExpandAll is done. But nothing I have tried does this.

Bellow is my code:

Private Sub btnExpandAll_Click(sender As Object, e As EventArgs) Handles btnExpandAll.Click
trvMasterFormat.Focus()
trvMasterFormat.ExpandAll()
trvMasterFormat.SelectedNode = trvMasterFormat.Nodes(0)
trvMasterFormat.Refresh()
End Sub

Any help in this regard woulkd be greatly appreciated.

Thanks!

[stanav]

Try this:

Private Sub btnExpandAll_Click(sender As Object, e As EventArgs) Handles btnExpandAll.Click
     trvMasterFormat.ExpandAll()
     trvMasterFormat.SelectedNode = trvMasterFormat.Nodes(0)
     trvMasterFormat.Select()
End Sub

[lhasha]

stanav thanks but end results is the tree view control is still showing the last node and not the first

[stanav]

stanav thanks but end results is the tree view control is still showing the last node and not the first

I don't quite understand what you mean exactly... The code works fine for me. Can you post a screen shot to show what you mean? And by the way, what, if any, treeview events are you handling?

[lhasha]

While I know that setting focus is not the correct term when referring to nodes, that is exactly what I am seeking. After expanding all, the TreeView is showing the very end of the list as shown below:


But when scrolling up, the first node is selected as shown below:


What I want is to have visual focus after the expand all as shown in the second image.

[Grimfort]

TreeView.TopNode.EnsureVisible

Something like that anyway.

[lhasha]

Grimfort: Thanks but same results

[lhasha]

This seems like one of 'THOSE' issues that will drive me crazy YIKES!

[lhasha]

I don't quite understand what you mean exactly... The code works fine for me. Can you post a screen shot to show what you mean? And by the way, what, if any, treeview events are you handling?

No treeview events being handled

[lhasha]

I don't quite understand what you mean exactly... The code works fine for me. Can you post a screen shot to show what you mean? And by the way, what, if any, treeview events are you handling?

No treeview events being handled

[4x2y]

The following code must work

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        TreeView1.ExpandAll()
        TreeView1.Nodes(0).EnsureVisible()
        TreeView1.SelectedNode = TreeView1.Nodes(0)
        TreeView1.Focus()
    End Sub

If it isn't work inside your project, try it with new project.

[lhasha]

The following code must work

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        TreeView1.ExpandAll()
        TreeView1.Nodes(0).EnsureVisible()
        TreeView1.SelectedNode = TreeView1.Nodes(0)
        TreeView1.Focus()
    End Sub

If it isn't work inside your project, try it with new project.

4x2y! BINGO! Thanks and thanks to all others who contributed!

[Grimfort]

TreeView1.Nodes(0).EnsureVisible()

Is no different from

TreeView.TopNode.EnsureVisible

So I have to assume it is the Focus you are interested in seeing, that is the blue highlight, in which case check out this property, which may help in future.

[4x2y]

TreeView1.Nodes(0).EnsureVisible()

Is no different from

TreeView.TopNode.EnsureVisible

They are totally different, TreeView1.Nodes(0) points to the first node while TreeView.TopNode points to the first visible node, to know the difference use

Debug.Print("TopNode is " & TreeView1.TopNode.Text)
        Debug.Print("Nodes(0) is " & TreeView1.Nodes(0).Text)

The TopNode property is changing each time you scroll the tree.