Determines if the server control contains any child controls.
System.Web (in System.Web.dll)
Public Overridable Function HasControls As Boolean
true if the control contains other controls; otherwise, false.
Since this method simply determines if any child controls exist, it can enhance performance by allowing you to avoid an unnecessary Count property call. Calls to this property require a ControlCollection object to be instantiated. If there are no children, this object creation wastes server resources.
The following example uses the HasControls method to determine if any controls exist before using the Count property to iterate through a ControlCollection object.
If HasControls() Then
Dim i As Integer
For i = 0 To Controls.Count - 1
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Available since 1.1