BindingManagerBase.PositionChanged BindingManagerBase.PositionChanged BindingManagerBase.PositionChanged BindingManagerBase.PositionChanged Event

定义

Position 属性的值更改后发生。Occurs after the value of the Position property has changed.

public:
 event EventHandler ^ PositionChanged;
public event EventHandler PositionChanged;
member this.PositionChanged : EventHandler 
Public Custom Event PositionChanged As EventHandler 

示例

下面的代码示例创建一个Binding, 然后将其添加到TextBox控件的Binding对象集合。The following code example creates a Binding, and then adds it to a collection of Binding objects for a TextBox control. 然后, 该示例获取BindingManagerBase数据源的, 并将委托添加PositionChanged到事件。The example then gets the BindingManagerBase for the data source and adds a delegate to the PositionChanged event.

   void BindControl()
   {
      
      /* Create a Binding object for the TextBox control. 
         The data-bound property for the control is the Text 
         property. */
      Binding^ myBinding = gcnew Binding( "Text",ds,"customers.custName" );
      text1->DataBindings->Add( myBinding );
      
      // Get the BindingManagerBase for the Customers table. 
      BindingManagerBase^ bmCustomers = this->BindingContext[ ds,"Customers" ];
      
      // Add the delegate for the PositionChanged event.
      bmCustomers->PositionChanged += gcnew EventHandler( this, &Form1::Position_Changed );
   }


private:
   void Position_Changed( Object^ sender, EventArgs^ /*e*/ )
   {
      
      // Print the Position property value when it changes.
      Console::WriteLine( (dynamic_cast<BindingManagerBase^>(sender))->Position );
   }

protected void BindControl()
{
   /* Create a Binding object for the TextBox control. 
   The data-bound property for the control is the Text 
   property. */
   Binding myBinding = 
   new Binding("Text", ds, "customers.custName");

   text1.DataBindings.Add(myBinding);

   // Get the BindingManagerBase for the Customers table. 
   BindingManagerBase bmCustomers = 
   this.BindingContext [ds, "Customers"];

   // Add the delegate for the PositionChanged event.
   bmCustomers.PositionChanged += 
   new EventHandler(Position_Changed);
}

private void Position_Changed(object sender, EventArgs e)
{
   // Print the Position property value when it changes.
   Console.WriteLine(((BindingManagerBase)sender).Position);
}

Protected Sub BindControl()
    ' Create a Binding object for the TextBox control.
    ' The data-bound property for the control is the Text
    ' property. 
    Dim myBinding As New Binding("Text", ds, "customers.custName")
    
    text1.DataBindings.Add(myBinding)
    
    ' Get the BindingManagerBase for the Customers table. 
    Dim bmCustomers As BindingManagerBase = Me.BindingContext(ds, "Customers")
    
    ' Add the delegate for the PositionChanged event.
    AddHandler bmCustomers.PositionChanged, AddressOf Position_Changed
End Sub 'BindControl


Private Sub Position_Changed(sender As Object, e As EventArgs)
    ' Print the Position property value when it changes.
    Console.WriteLine(CType(sender, BindingManagerBase).Position)
End Sub 'Position_Changed

注解

有关处理事件的详细信息, 请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于