DataGridColumnStyle.CheckValidDataSource(CurrencyManager) Méthode

Définition

Espace de noms:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Lève une exception si la DataGrid ne possède pas une source de données valide, ou si cette colonne n'est pas mappée avec une propriété valide dans la source de données.

protected:
 void CheckValidDataSource(System::Windows::Forms::CurrencyManager ^ value);

protected void CheckValidDataSource (System.Windows.Forms.CurrencyManager value);

member this.CheckValidDataSource : System.Windows.Forms.CurrencyManager -> unit

Protected Sub CheckValidDataSource (value As CurrencyManager)

Paramètres

value

CurrencyManager

CurrencyManager à vérifier.

Exceptions

ArgumentNullException

value a la valeur null.

ApplicationException

Le PropertyDescriptor pour cette colonne est null.

Exemples

L’exemple de code suivant obtient une CurrencyManager source de données et utilise la CheckValidDataSource méthode pour déterminer si elle CurrencyManager est valide.

private:
   void CheckCurrencyManager( CurrencyManager^ myCurrencyManager )
   {
      // This code is from a class named MyDataGridColumnStyle derived
      // from DataGridColumnStyle.
      MyDataGridColumnStyle^ myGridColumn = this;
      try
      {
         myGridColumn->CheckValidDataSource( myCurrencyManager );
      }
      catch ( ArgumentNullException^ e ) 
      {
         Console::WriteLine( e->Message );
      }
      catch ( ApplicationException^ e ) 
      {
         Console::WriteLine( e->Message );
      }
   }

private void CheckCurrencyManager(CurrencyManager myCurrencyManager) {
    // This code is from a class named MyDataGridColumnStyle derived
    // from DataGridColumnStyle.
    MyDataGridColumnStyle myGridColumn = this;
    try {
        myGridColumn.CheckValidDataSource(myCurrencyManager);
    }
    catch (ArgumentNullException e) {
        Console.WriteLine(e.Message);
    }
    catch (ApplicationException e) {
        Console.WriteLine(e.Message);
    }
}

Private Sub CheckCurrencyManager(myCurrencyManager As CurrencyManager)
    ' This code is from a class named MyDataGridColumnStyle derived
    ' from DataGridColumnStyle.
    Dim myGridColumn As MyDataGridColumnStyle = Me
    Try
        myGridColumn.CheckValidDataSource(myCurrencyManager)
    Catch e As ArgumentNullException
        Console.WriteLine(e.Message)
    Catch e As ApplicationException
        Console.WriteLine(e.Message)
    End Try
End Sub