ComponentChangingEventHandler デリゲートとは? わかりやすく解説

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ComponentChangingEventHandler デリゲート

ComponentChanging イベント処理するメソッド表します

名前空間: System.ComponentModel.Design
アセンブリ: System (system.dll 内)
構文構文

<ComVisibleAttribute(True)> _
Public Delegate Sub ComponentChangingEventHandler
 ( _
    sender As Object, _
    e As ComponentChangingEventArgs _
)
Dim instance As New ComponentChangingEventHandler(AddressOf
 HandlerMethod)
[ComVisibleAttribute(true)] 
public delegate void ComponentChangingEventHandler
 (
    Object sender,
    ComponentChangingEventArgs e
)
[ComVisibleAttribute(true)] 
public delegate void ComponentChangingEventHandler
 (
    Object^ sender, 
    ComponentChangingEventArgs^ e
)
/** @delegate */
/** @attribute ComVisibleAttribute(true) */ 
public delegate void ComponentChangingEventHandler
 (
    Object sender, 
    ComponentChangingEventArgs e
)
JScript では、デリゲート使用できますが、新規に宣言することはできません。

パラメータ

sender

イベントソース

e

イベント データ格納している ComponentChangingEventArgs イベント

解説解説
使用例使用例

ComponentChangingEventHandler の登録と ComponentChanging イベント処理の例次に示します

Public Sub LinkComponentChangingEvent(ByVal
 changeService As IComponentChangeService)
    ' Registers an event handler for the ComponentChanging event.
    AddHandler changeService.ComponentChanging, AddressOf
 Me.OnComponentChanging
End Sub

Private Sub OnComponentChanging(ByVal
 sender As Object, ByVal
 e As ComponentChangingEventArgs)
    ' Displays changing component information on the console.
    Console.WriteLine(("Type of the component that is about to
 change: " + e.Component.GetType().FullName))
    Console.WriteLine(("Name of the member of the component that
 is about to change: " + e.Member.Name))
End Sub
public void LinkComponentChangingEvent(IComponentChangeService
 changeService)
{
    // Registers an event handler for the ComponentChanging event.
    changeService.ComponentChanging += new ComponentChangingEventHandler(this.OnComponentChanging);
            
}

private void OnComponentChanging(object sender,
 ComponentChangingEventArgs e)
{
    // Displays changing component information on the console.
    Console.WriteLine("Type of the component that is about to change: "+e.Component.GetType().FullName);
      
    Console.WriteLine("Name of the member of the component that is about to
 change: "+e.Member.Name);                        
}
public:
   void LinkComponentChangingEvent( IComponentChangeService^ changeService
 )
   {
      // Registers an event handler for the ComponentChanging event.
      changeService->ComponentChanging += gcnew ComponentChangingEventHandler(
         this, &ComponentChangingEventHandlerExample::OnComponentChanging
 );
   }

private:
   void OnComponentChanging( Object^ sender, ComponentChangingEventArgs^
 e )
   {
      // Displays changing component information on the console.
      Console::WriteLine( "Type of the component that is about to change: "
 +
         e->Component->GetType()->FullName );
      Console::WriteLine( "Name of the member of the component that is about
 to change: " +
         e->Member->Name );
   }
public void LinkComponentChangingEvent(IComponentChangeService
 changeService) 
{
    // Registers an event handler for the ComponentChanging event.
    changeService.add_ComponentChanging(new ComponentChangingEventHandler(
        this.OnComponentChanging));
} //LinkComponentChangingEvent

private void OnComponentChanging(Object sender,
 ComponentChangingEventArgs e)
{
    // Displays changing component information on the console.
    Console.WriteLine("Type of the component that is about to change: "
 
        + e.get_Component().GetType().get_FullName());
    Console.WriteLine("Name of the member of the component that is about"
        + " to change: " + e.get_Member().get_Name());
} //OnComponentChanging
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参照参照
関連項目
System.ComponentModel.Design 名前空間
ComponentChanging
ComponentChanged
ComponentChangingEventArgs クラス
IComponentChangeService



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