CurrencyManager.ItemChanged CurrencyManager.ItemChanged CurrencyManager.ItemChanged CurrencyManager.ItemChanged Event

Définition

Se produit suite à la modification de l'élément en cours.Occurs when the current item has been altered.

public:
 event System::Windows::Forms::ItemChangedEventHandler ^ ItemChanged;
public event System.Windows.Forms.ItemChangedEventHandler ItemChanged;
member this.ItemChanged : System.Windows.Forms.ItemChangedEventHandler 
Public Custom Event ItemChanged As ItemChangedEventHandler 

Exemples

L’exemple de code suivant ajoute des gestionnaires d’événements ItemChanged pour PositionChanged les événements et.The following code example adds event handlers for the ItemChanged and PositionChanged events.

void BindControl( DataTable^ myTable )
{
   
   // Bind A TextBox control to a DataTable column in a DataSet.
   textBox1->DataBindings->Add( "Text", myTable, "CompanyName" );
   
   // Specify the CurrencyManager for the DataTable.
   myCurrencyManager = dynamic_cast<CurrencyManager^>(this->BindingContext[myTable, ""]);
   
   // Add event handlers.
   myCurrencyManager->ItemChanged += gcnew ItemChangedEventHandler( this, &Form1::CurrencyManager_ItemChanged );
   myCurrencyManager->PositionChanged += gcnew EventHandler( this, &Form1::CurrencyManager_PositionChanged );
   
   // Set the initial Position of the control.
   myCurrencyManager->Position = 0;
}

void CurrencyManager_PositionChanged( Object^ sender, System::EventArgs^ /*e*/ )
{
   CurrencyManager^ myCurrencyManager = dynamic_cast<CurrencyManager^>(sender);
   Console::WriteLine( "Position Changed {0}", myCurrencyManager->Position );
}

void CurrencyManager_ItemChanged( Object^ sender, System::Windows::Forms::ItemChangedEventArgs^ /*e*/ )
{
   CurrencyManager^ myCurrencyManager = dynamic_cast<CurrencyManager^>(sender);
   Console::WriteLine( "Item Changed {0}", myCurrencyManager->Position );
}

   private void BindControl(DataTable myTable)
   {
       // Bind A TextBox control to a DataTable column in a DataSet.
       textBox1.DataBindings.Add("Text", myTable, "CompanyName");
       // Specify the CurrencyManager for the DataTable.
       myCurrencyManager = (CurrencyManager)this.BindingContext[myTable, ""];
       // Add event handlers.
       myCurrencyManager.ItemChanged+=
       new ItemChangedEventHandler(CurrencyManager_ItemChanged);
       myCurrencyManager.PositionChanged+= 
       new EventHandler(CurrencyManager_PositionChanged);
       // Set the initial Position of the control.
       myCurrencyManager.Position = 0;
   }

   private void CurrencyManager_PositionChanged(object sender, System.EventArgs e){
       CurrencyManager myCurrencyManager = (CurrencyManager) sender;
       Console.WriteLine("Position Changed " + myCurrencyManager.Position);
   }

   private void CurrencyManager_ItemChanged(object sender, System.Windows.Forms.ItemChangedEventArgs e){
       CurrencyManager myCurrencyManager = (CurrencyManager) sender;
       Console.WriteLine("Item Changed " + myCurrencyManager.Position);
   }
Private Sub BindControl(myTable As DataTable)
    ' Bind A TextBox control to a DataTable column in a DataSet.
    textBox1.DataBindings.Add("Text", myTable, "CompanyName")
    ' Specify the CurrencyManager for the DataTable.
    myCurrencyManager = CType(Me.BindingContext(myTable, ""), CurrencyManager)
    ' Add event handlers.
    AddHandler myCurrencyManager.ItemChanged, AddressOf CurrencyManager_ItemChanged
    AddHandler myCurrencyManager.PositionChanged, AddressOf CurrencyManager_PositionChanged
    ' Set the initial Position of the control.
    myCurrencyManager.Position = 0
End Sub


Private Sub CurrencyManager_PositionChanged(sender As Object, e As System.EventArgs)
    Dim myCurrencyManager As CurrencyManager = CType(sender, CurrencyManager)
    Console.WriteLine(("Position Changed " & myCurrencyManager.Position))
End Sub


Private Sub CurrencyManager_ItemChanged(sender As Object, e As System.Windows.Forms.ItemChangedEventArgs)
    Dim myCurrencyManager As CurrencyManager = CType(sender, CurrencyManager)
    Console.WriteLine(("Item Changed " & myCurrencyManager.Position))
End Sub

Remarques

L' ItemChanged événement se produit lorsque l’utilisateur appelle la ResumeBinding méthode SuspendBinding ou.The ItemChanged event will occur when the user calls the ResumeBinding or SuspendBinding method.

L' ItemChanged événement se produit uniquement lorsque l’élément lui-même a été modifié de quelque manière que ce soit.The ItemChanged event occurs only when the item itself has been changed in some manner. Par exemple, si la valeur d’un élément est modifiée de 10 à 42, l’événement se produit.For example, if the value of an item is changed from 10 to 42, the event will occur. Cela ne doit pas être confondu avec PositionChanged l’événement où l’élément a été remplacé par un nouvel élément.This should not be confused with the PositionChanged event where the item has been changed to a new item.

L’événement se produit également si les données sous-jacentes sont modifiées.The event will also occur if the underlying data changes. Par exemple, si vous modifiez la valeur d’un DataRowView, l' ItemChanged événement se produit.For example, if you change the value of a DataRowView, the ItemChanged event will occur.

Notes

Si vous créez votre propre contrôle qui utilise CurrencyManager, vous devez utiliser à la IBindingList.ListChanged place de l' CurrencyManager.ItemChanged événement.If you are creating your own control that uses the CurrencyManager, you should use the IBindingList.ListChanged instead of the CurrencyManager.ItemChanged event. La ListChangedType propriétéListChangedEventArgs de vous permet de déterminer le type d’action qui s’est produit.The ListChangedType property of the ListChangedEventArgs enables you to determine the type of action that has occurred.

Pour plus d'informations sur la gestion des événements, voir gestion et déclenchement d’événements.For more information about handling events, see Handling and Raising Events.

S’applique à

Voir aussi