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Control.CreateControlCollection 方法

定義

建立新的 ControlCollection 物件來保存伺服器控制項的子控制項 (常值和伺服器)。

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

ControlCollection

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

範例

下列程式碼範例會 CreateControlCollection 覆寫 方法,以建立繼承自 類別的 CustomControlCollection ControlCollection 類別實例。

// 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

下列程式碼範例會在 CreateControlCollection 方法的 CreateChildControls 自訂伺服器控制項覆寫中使用 方法。 會建立新的集合,然後填入兩個子控制項和 firstControl 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

如果您已建立衍生自 類別的 ControlCollection 集合物件,請在自訂伺服器控制項中覆寫這個方法。 然後,您可以在此方法的覆寫中具現化該集合類別。

適用於

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