Control.BindingContextChanged 事件

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

当 BindingContext 属性的值更改时发生。

public:
 event EventHandler ^ BindingContextChanged;

public event EventHandler? BindingContextChanged;

member this.BindingContextChanged : EventHandler 

Public Custom Event BindingContextChanged As EventHandler 

事件类型

EventHandler

示例

下面的代码示例将委托添加到 EventHandlerBindingContextChanged 控件的 TextBox 事件。

private:
   void AddEventHandler()
   {
      textBox1->BindingContextChanged += gcnew EventHandler(
         this, &Form1::BindingContext_Changed );
   }

   void BindingContext_Changed( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      Console::WriteLine( "BindingContext changed" );
   }

private void AddEventHandler()
{
   textBox1.BindingContextChanged += new EventHandler(BindingContext_Changed);
}

private void BindingContext_Changed(object sender, EventArgs e)
{
   Console.WriteLine("BindingContext changed");
}

Private Sub AddEventHandler()
    AddHandler textBox1.BindingContextChanged, _
       AddressOf BindingContext_Changed
End Sub    
   
Private Sub BindingContext_Changed(sender As Object, e As EventArgs)
    Console.WriteLine("BindingContext changed")
End Sub

注解

若要通过 BindingContext 属性向 Control 添加新BindingContext的 ，请参阅 BindingContext 构造函数。

如果 BindingContext 通过编程修改或用户交互更改属性，则会引发此事件。

有关处理事件的详细信息，请参阅 处理和引发事件。

另请参阅

• BindingContext
• Binding
• BindingManagerBase
• OnBindingContextChanged(EventArgs)