ToolboxComponentsCreatingEventHandler 代理人

定義

命名空間:

System.Drawing.Design

組件:

System.Windows.Forms.Design.dll

代表處理 ComponentsCreating 事件的方法。

public delegate void ToolboxComponentsCreatingEventHandler(System::Object ^ sender, ToolboxComponentsCreatingEventArgs ^ e);

public delegate void ToolboxComponentsCreatingEventHandler(object sender, ToolboxComponentsCreatingEventArgs e);

type ToolboxComponentsCreatingEventHandler = delegate of obj * ToolboxComponentsCreatingEventArgs -> unit

Public Delegate Sub ToolboxComponentsCreatingEventHandler(sender As Object, e As ToolboxComponentsCreatingEventArgs)

參數

sender

Object

事件的來源。

e

ToolboxComponentsCreatingEventArgs

提供事件資料的 ToolboxComponentsCreatingEventArgs。

範例

下列範例程式碼提供一個方法，這個方法會附加 事件的事件處理常式 ComponentsCreatingToolboxItem ，以及 ToolboxComponentsCreatingEventHandler 事件處理常式方法，這個方法會寫入事件引發 ComponentsCreating 事件處理常式時接收新元件或元件 Console 之元件類型的名稱。

public:
   [PermissionSetAttribute(SecurityAction::Demand, Name="FullTrust")]
   void LinkToolboxComponentsCreatingEvent( ToolboxItem^ item )
   {
      item->ComponentsCreating +=
         gcnew ToolboxComponentsCreatingEventHandler( this, &Form1::OnComponentsCreating );
   }

private:
   void OnComponentsCreating( Object^ sender, ToolboxComponentsCreatingEventArgs^ e )
   {
      // Displays ComponentsCreating event information on the Console.
      Console::WriteLine( "Name of the class of the root component of " +
         "the designer host receiving new components: " +
         e->DesignerHost->RootComponentClassName );
   }

public void LinkToolboxComponentsCreatingEvent(ToolboxItem item)
{
    item.ComponentsCreating += new ToolboxComponentsCreatingEventHandler(this.OnComponentsCreating);
}

private void OnComponentsCreating(object sender, ToolboxComponentsCreatingEventArgs e)
{
    // Displays ComponentsCreating event information on the Console.
    Console.WriteLine("Name of the class of the root component of " +
    "the designer host receiving new components: " +
    e.DesignerHost.RootComponentClassName);
}

Public Sub LinkToolboxComponentsCreatingEvent(ByVal item As ToolboxItem)
    AddHandler item.ComponentsCreating, AddressOf Me.OnComponentsCreating
End Sub

Private Sub OnComponentsCreating(ByVal sender As Object, ByVal e As ToolboxComponentsCreatingEventArgs)
    ' Displays ComponentsCreating event information on the Console.
    Console.WriteLine(("Name of the class of the root component of the designer host receiving new components: " + e.DesignerHost.RootComponentClassName))
End Sub

備註

建立 ToolboxComponentsCreatingEventHandler 委派時，必須識別處理事件的方法。 若要使事件與您的事件處理常式產生關聯，請將委派的執行個體 (Instance) 加入至事件。 除非您移除委派，否則每當事件發生時就會呼叫事件處理常式。 如需事件處理常式委派的詳細資訊，請參閱 處理和引發事件。

擴充方法

另請參閱

• ToolboxComponentsCreatingEventArgs
• ComponentsCreating