DataAdapter.MissingMappingAction 属性

定义

确定传入数据没有匹配的表或列时需要执行的操作。Determines the action to take when incoming data does not have a matching table or column.

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

属性值

MissingMappingAction 值之一。One of the MissingMappingAction values. 默认为 PassthroughThe default is Passthrough.

实现

属性

例外

设置的值不是 MissingMappingAction 值之一。The value set is not one of the MissingMappingAction values.

示例

下面的示例创建一个派生类,OleDbDataAdapter 并设置其一些属性。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

注解

TableMappings 属性提供返回的记录和 DataSet之间的主映射。The TableMappings property provides the master mapping between the returned records and the DataSet.

适用于

另请参阅