The following code example overrides the CreateControlCollection method to create an instance of a CustomControlCollection class, which inherits from the ControlCollection class.
' Override the CreateControlCollection method to
' write to the Trace object when tracing is enabled
' for the page or application in which this control
' is included.
Protected Overrides Function CreateControlCollection() As ControlCollection
Return New CustomControlCollection(Me)
End Function
// Override the CreateControlCollection method to
// write to the Trace object when tracing is enabled
// for the page or application in which this control
// is included.
protected override ControlCollection CreateControlCollection()
{
return new CustomControlCollection(this);
}
The following code example uses the CreateControlCollection method in a custom server control override of the CreateChildControls method. The new collection is created, and then populated with two child controls, firstControl and secondControl.
Protected Overrides Sub CreateChildControls()
' Creates a new ControlCollection.
Me.CreateControlCollection()
' Create child controls.
Dim firstControl As New ChildControl()
firstControl.Message = "FirstChildControl"
Dim secondControl As New ChildControl()
secondControl.Message = "SecondChildControl"
Controls.Add(firstControl)
Controls.Add(secondControl)
' Prevent child controls from being created again.
ChildControlsCreated = True
End Sub 'CreateChildControls
protected override void CreateChildControls()
{
// Creates a new ControlCollection.
this.CreateControlCollection();
// Create child controls.
ChildControl firstControl = new ChildControl();
firstControl.Message = "FirstChildControl";
ChildControl secondControl = new ChildControl();
secondControl.Message = "SecondChildControl";
Controls.Add(firstControl);
Controls.Add(secondControl);
// Prevent child controls from being created again.
ChildControlsCreated = true;
}