DataAdapter.MissingSchemaAction DataAdapter.MissingSchemaAction DataAdapter.MissingSchemaAction DataAdapter.MissingSchemaAction Property

Definizione

Determina l'operazione da eseguire quando per lo schema DataSet esistente non esistono dati in arrivo corrispondenti.Determines the action to take when existing DataSet schema does not match incoming data.

public:
 property System::Data::MissingSchemaAction MissingSchemaAction { System::Data::MissingSchemaAction get(); void set(System::Data::MissingSchemaAction value); };
[System.Data.DataSysDescription("DataAdapter_MissingSchemaAction")]
public System.Data.MissingSchemaAction MissingSchemaAction { get; set; }
member this.MissingSchemaAction : System.Data.MissingSchemaAction with get, set
Public Property MissingSchemaAction As MissingSchemaAction

Valore della proprietà

Uno dei valori di MissingSchemaAction.One of the MissingSchemaAction values. Il valore predefinito è Add.The default is Add.

Implementazioni

Eccezioni

Il valore impostato non è uno dei valori di MissingSchemaAction.The value set is not one of the MissingSchemaAction values.

Esempi

Nell'esempio seguente viene creata una classe OleDbDataAdapter derivata e vengono impostate alcune delle relative proprietà.The following example creates a derived class, OleDbDataAdapter and sets some of its properties.

// Assumes a valid connection string to an Access database.
static void CreateOleDbAdapter(string connectionString)
{
    OleDbDataAdapter adapter = new OleDbDataAdapter();
    adapter.SelectCommand =
        new OleDbCommand("SELECT * FROM Categories ORDER BY CategoryID");
    adapter.SelectCommand.Connection =
        new OleDbConnection(connectionString);
    adapter.MissingMappingAction = MissingMappingAction.Error;
    adapter.MissingSchemaAction = MissingSchemaAction.Error;
}
' Assumes a valid connection string to an Access database.
Private Sub CreateOleDbDataAdapter(ByVal connectionString As String)
    Dim adapter As New OleDbDataAdapter()
    adapter.SelectCommand = _
       New OleDbCommand("SELECT * FROM Categories ORDER BY CategoryID")
    adapter.SelectCommand.Connection = New OleDbConnection _
       (connectionString)
    adapter.MissingMappingAction = MissingMappingAction.Error
    adapter.MissingSchemaAction = MissingSchemaAction.Error
End Sub

Si applica a

Vedi anche