Control.CreateControlCollection 方法

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

傳回

一個 ControlCollection 物件，用來包含目前伺服器控制項的子伺服器控制項。

範例

以下程式碼範例覆寫了 CreateControlCollection 建立類別實例的方法，該實例 CustomControlCollection 會繼承自該 ControlCollection 類別。

// 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

以下程式碼範例在自訂伺服器控制覆蓋CreateControlCollection中使用此CreateChildControls方法。 新集合被建立，然後填充兩個子控制項， firstControl 以及 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

備註

如果你建立了從 ControlCollection 類別衍生的集合物件，則在自訂伺服器控制中覆寫此方法。 接著你可以在這個方法的覆寫中實例化該集合類別。

另請參閱

• ControlCollection