Control.CreateControlCollection Metoda

Definicja

Tworzy nowy ControlCollection obiekt do przechowywania formantów podrzędnych (zarówno literału, jak i serwera) formantu serwera.Creates a new ControlCollection object to hold the child controls (both literal and server) of the server control.

protected:
 virtual System::Web::UI::ControlCollection ^ CreateControlCollection();
protected virtual System.Web.UI.ControlCollection CreateControlCollection ();
abstract member CreateControlCollection : unit -> System.Web.UI.ControlCollection
override this.CreateControlCollection : unit -> System.Web.UI.ControlCollection
Protected Overridable Function CreateControlCollection () As ControlCollection

Zwraca

ControlCollection

ControlCollectionObiekt, który zawiera kontrolki serwera podrzędnego bieżącego formantu serwera.A ControlCollection object to contain the current server control's child server controls.

Przykłady

Poniższy przykład kodu przesłania CreateControlCollection metodę, aby utworzyć wystąpienie CustomControlCollection klasy, która dziedziczy z ControlCollection klasy.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 override ControlCollection CreateControlCollection()
{
    return new CustomControlCollection(this);
}
' 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

Poniższy przykład kodu używa CreateControlCollection metody w niestandardowym przesłonięciu kontroli serwera CreateChildControls metody.The following code example uses the CreateControlCollection method in a custom server control override of the CreateChildControls method. Nowa kolekcja zostanie utworzona, a następnie uzupełniona dwoma kontrolkami podrzędnymi firstControl i secondControl .The new collection is created, and then populated with two child controls, firstControl and secondControl.


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;
}

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


Uwagi

Zastąp tę metodę w niestandardowej kontrolce serwera, jeśli utworzono obiekt kolekcji, który jest pochodną ControlCollection klasy.Override this method in a custom server control if you have created a collection object that is derived from the ControlCollection class. Następnie można utworzyć wystąpienie tej klasy kolekcji w przesłonięciu tej metody.You can then instantiate that collection class in the override of this method.

Dotyczy

Zobacz też