DataAdapter.MissingSchemaAction 属性

定义

命名空间:

System.Data.Common

程序集:

System.Data.Common.dll

Source:

DataAdapter.cs

确定现有 DataSet 架构与传入数据不匹配时需要执行的操作。

public:
 property System::Data::MissingSchemaAction MissingSchemaAction { System::Data::MissingSchemaAction get(); void set(System::Data::MissingSchemaAction value); };

public System.Data.MissingSchemaAction MissingSchemaAction { get; set; }

member this.MissingSchemaAction : System.Data.MissingSchemaAction with get, set

Public Property MissingSchemaAction As MissingSchemaAction

属性值

MissingSchemaAction

MissingSchemaAction 值之一。 默认值为 Add。

实现

MissingSchemaAction

例外

ArgumentException

设置的值不是 MissingSchemaAction 值之一。

示例

以下示例创建一个派生类， OleDbDataAdapter 并设置其某些属性。

// 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

另请参阅

• MissingMappingAction
• ADO.NET 概述