DataAdapter.MissingMappingAction 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
确定传入数据没有匹配的表或列时需要执行的操作。
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[<System.Data.DataSysDescription("DataAdapter_MissingMappingAction")>]
member this.MissingMappingAction : System.Data.MissingMappingAction with get, setPublic Property MissingMappingAction As MissingMappingAction属性值
MissingMappingAction 值之一。 默认值为 Passthrough。
实现
- 属性
例外
设置的值不是 MissingMappingAction 值之一。
示例
以下示例创建一个派生类， OleDbDataAdapter 并设置其一些属性。
// 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
属性 TableMappings 提供返回的记录与 DataSet之间的主映射。
