ToolboxComponentsCreatedEventHandler 委托

定义

命名空间:

System.Drawing.Design

程序集:

System.Windows.Forms.Design.dll

表示 ComponentsCreated 事件的处理方法。

public delegate void ToolboxComponentsCreatedEventHandler(System::Object ^ sender, ToolboxComponentsCreatedEventArgs ^ e);

public delegate void ToolboxComponentsCreatedEventHandler(object sender, ToolboxComponentsCreatedEventArgs e);

type ToolboxComponentsCreatedEventHandler = delegate of obj * ToolboxComponentsCreatedEventArgs -> unit

Public Delegate Sub ToolboxComponentsCreatedEventHandler(sender As Object, e As ToolboxComponentsCreatedEventArgs)

参数

sender

Object

事件源。

e

ToolboxComponentsCreatedEventArgs

为事件提供数据的 ToolboxComponentsCreatedEventArgs。

示例

以下示例代码提供了一个方法，该方法为 ComponentsCreatedToolboxItem的事件附加事件处理程序。 它还提供了一个ToolboxComponentsCreatedEventHandler事件处理程序方法，该方法在事件引发ComponentsCreated事件处理程序时，Console将创建的组件类型的名称写入 。

public:
   [PermissionSetAttribute(SecurityAction::Demand, Name="FullTrust")]
   void LinkToolboxComponentsCreatedEvent( ToolboxItem^ item )
   {
      item->ComponentsCreated +=
         gcnew ToolboxComponentsCreatedEventHandler( this, &Form1::OnComponentsCreated );
   }

private:
   void OnComponentsCreated( Object^ sender, ToolboxComponentsCreatedEventArgs^ e )
   {
      // Lists created components on the Console.
      for ( int i = 0; i < e->Components->Length; i++ )
      {
         Console::WriteLine( "Component #" + i + ": " +
            e->Components[ i ]->Site->Name );
      }
   }

public void LinkToolboxComponentsCreatedEvent(ToolboxItem item)
{
    item.ComponentsCreated += new ToolboxComponentsCreatedEventHandler(this.OnComponentsCreated);
}

private void OnComponentsCreated(object sender, ToolboxComponentsCreatedEventArgs e)
{
    // Lists created components on the Console.
    for( int i=0; i< e.Components.Length; i++ )
        Console.WriteLine("Component #"+i.ToString()+": "+e.Components[i].Site.Name.ToString());            
}

Public Sub LinkToolboxComponentsCreatedEvent(ByVal item As ToolboxItem)
    AddHandler item.ComponentsCreated, AddressOf Me.OnComponentsCreated
End Sub

Private Sub OnComponentsCreated(ByVal sender As Object, ByVal e As ToolboxComponentsCreatedEventArgs)
    ' Lists created components on the Console.
    Dim i As Integer
    For i = 0 To e.Components.Length - 1
        Console.WriteLine(("Component #" + i.ToString() + ": " + e.Components(i).Site.Name.ToString()))
    Next i
End Sub

注解

创建 ToolboxComponentsCreatedEventHandler 委托时，需要标识将处理该事件的方法。 若要将事件与事件处理程序关联，请将该委托的一个实例添加到事件中。 除非移除了该委托，否则每当发生该事件时就会调用事件处理程序。 有关事件处理程序委托的详细信息，请参阅 处理和引发事件。

扩展方法

另请参阅

• ToolboxComponentsCreatedEventArgs