BindingManagerBase.PositionChanged Kejadian

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Terjadi setelah nilai Position properti berubah.

public:
 event EventHandler ^ PositionChanged;

public event EventHandler PositionChanged;

member this.PositionChanged : EventHandler 

Public Custom Event PositionChanged As EventHandler 

Jenis Acara

EventHandler

Contoh

Contoh kode berikut membuat Binding, lalu menambahkannya ke kumpulan Binding objek untuk TextBox kontrol. Contohnya kemudian mendapatkan BindingManagerBase untuk sumber data dan menambahkan delegasi ke peristiwa.PositionChanged

   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


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

Keterangan

Untuk informasi selengkapnya tentang menangani peristiwa, lihat Menangani dan Menaikkan Peristiwa.