Hello,

I need a recursive find control down the control tree.

I have created some code and also found a few examples online.

However, I am having some problem to decide which one to use because I
think if this code is not well done it can slow my web site.

Any advice about these codes would be great or even point me to better
code:

Code 1

Public Shared Function FindControl(Of T As Class)(ByVal Controls As
System.Web.UI.ControlCollection) As T
   Dim found As T = Nothing
   If Controls IsNot Nothing AndAlso Controls.Count > 0 Then
       For i As Integer = 0 To Controls.Count - 1
           If TypeOf Controls(i) Is T Then
               found = TryCast(Controls(i), T)
               Exit For
           Else
               found = FindControl(Of T)(Controls(i).Controls)
           End If
       Next
   End If
   Return found
End Function

Code 2

Private Function FindControlRecursive(ByVal root As Control, ByVal id
As String) As Control
   If root.ID = id Then
       Return root
   End If

   For Each c As Control In root.Controls
       Dim t As Control = FindControlRecursive(c, id)
       If t IsNot Nothing Then
           Return t
       End If
   Next

   Return Nothing
End Function

Code 3

   Public Delegate Function ControlWalkerMatcher(ByVal control As
Control) As Boolean
   Public Shared Function ControlWalker(ByVal control As Control,
ByVal matcher As ControlWalkerMatcher) As Control()

     Dim parent As New ArrayList()
     If matcher(control) Then
       parent.Add(control)
     End If

     For i As Integer = 0 To control.Controls.Count - 1
       Dim child As Control() = ControlWalker(control.Controls(i),
matcher)
       If child.Length > 0 Then
         parent.AddRange(child)
       End If
     Next i
     Return DirectCast(parent.ToArray(GetType(Control)), Control())
   End Function

Thanks,

Miguel