DataAdapter.MissingSchemaAction Proprietà

Definizione

Spazio dei nomi:
System.Data.Common
Assembly:
netstandard.dll, System.Data.Common.dll
Assembly:
System.Data.Common.dll
Assembly:
System.Data.dll
Assembly:
netstandard.dll
Origine:
DataAdapter.cs
Origine:
DataAdapter.cs
Origine:
DataAdapter.cs
Origine:
DataAdapter.cs
Origine:
DataAdapter.cs

Determina l'azione da eseguire quando lo schema esistente DataSet non corrisponde ai dati in ingresso.

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

Valore della proprietà

MissingSchemaAction

Uno dei MissingSchemaAction valori. Il valore predefinito è Add.

Implementazioni

MissingSchemaAction
Attributi
DataSysDescriptionAttribute

Eccezioni

ArgumentException

Il set di valori non è uno dei MissingSchemaAction valori.

Esempio

Nell'esempio seguente viene creata una classe OleDbDataAdapter derivata e vengono impostate alcune delle relative proprietà.

// 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