If Treeview1.SelectedNode.Text = {"test", "test1", "test2"} Then
 
        End If

Zitat:

If Treeview1.SelectedNode.Text = {"test", "test1", "test2"} Then End If

If Treeview1.SelectedNode.Text = "test" _
OR Treeview1.SelectedNode.Text = "test1" _
OR Treeview1.SelectedNode.Text = "test2" Then
 
End If

        Dim treeview1 As New TreeView
        Dim nd As TreeNode = treeview1.Nodes.Add("TEST1")
 
        treeview1.SelectedNode = nd
 
        Dim myConditions() As String = {"test1", "test2", "test3"}
 
        If myConditions.Contains(treeview1.SelectedNode.Text.ToLower) Then
            MsgBox("gefunden")
        Else
            MsgBox("nicht gefunden")
        End If