Control.CreateControlCollection Control.CreateControlCollection Control.CreateControlCollection Control.CreateControlCollection Method

定义

创建一个新 ControlCollection 对象来保存服务器控件的子控件(包括文本控件和服务器控件)。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

返回

一个 ControlCollection 对象,用于包含当前服务器控件的子服务器控件。A ControlCollection object to contain the current server control's child server controls.

示例

下面的代码示例重写CreateControlCollection方法以创建CustomControlCollection类的实例ControlCollection ,该类继承自类。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

下面的代码示例使用CreateControlCollection CreateChildControls方法的自定义服务器控件重写中的方法。The following code example uses the CreateControlCollection method in a custom server control override of the CreateChildControls method. 创建新的集合,然后用两个子控件(和firstControl secondControl)填充。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


注解

如果已创建派生自ControlCollection类的集合对象,请在自定义服务器控件中重写此方法。Override this method in a custom server control if you have created a collection object that is derived from the ControlCollection class. 然后,你可以在此方法的重写中实例化此集合类。You can then instantiate that collection class in the override of this method.

适用于

另请参阅