How To Add 3 Tree Views In Master Page

I added 3 tree views in my master page, i want them to show them based on different conditions, but they are not visible on other pages.

Code:

Dim TreeView1 As System.Web.UI.WebControls.TreeView = New TreeView
Dim TreeView2 As System.Web.UI.WebControls.TreeView = New TreeView
Dim TreeView3 As System.Web.UI.WebControls.TreeView = New TreeView
Dim str As String = HttpContext.Current.Profile.GetPropertyValue("UserType")
Select Case (str)
Case "Faculty"
Response.Write("Faculty")
TreeView1.Visible = True
Exit Select
Case "Admin"
Response.Write("Admin")
TreeView2.Visible = True
Exit Select
Case "Student"
Response.Write("Student")
TreeView3.Visible = True
Exit Select
End Select