OleDbDataAdapter.DeleteCommand 屬性

定義

命名空間:

System.Data.OleDb

組件:

System.Data.OleDb.dll

套件:

System.Data.OleDb v8.0.0

來源:

OleDbDataAdapter.cs

取得或設定 SQL 陳述式或預存程序以從資料集中刪除資料錄。

public:
 property System::Data::OleDb::OleDbCommand ^ DeleteCommand { System::Data::OleDb::OleDbCommand ^ get(); void set(System::Data::OleDb::OleDbCommand ^ value); };

public System.Data.OleDb.OleDbCommand? DeleteCommand { get; set; }

member this.DeleteCommand : System.Data.OleDb.OleDbCommand with get, set

Public Property DeleteCommand As OleDbCommand

屬性值

OleDbCommand

OleDbCommand，用來在 Update(DataSet) 期間刪除資料來源中的資料錄，這些資料錄對應至 DataSet 中刪除的資料列。

範例

下列範例會 OleDbDataAdapter 建立 並設定 SelectCommand 和 DeleteCommand 屬性。 它假設您已經建立 OleDbConnection 物件。

public static OleDbDataAdapter CreateCustomerAdapter(
    OleDbConnection connection)
{
    OleDbDataAdapter dataAdapter = new OleDbDataAdapter();
    OleDbCommand command;
    OleDbParameter parameter;

    // Create the SelectCommand.
    command = new OleDbCommand("SELECT CustomerID FROM Customers " +
        "WHERE Country = ? AND City = ?", connection);

    command.Parameters.Add("Country", OleDbType.VarChar, 15);
    command.Parameters.Add("City", OleDbType.VarChar, 15);

    dataAdapter.SelectCommand = command;

    // Create the DeleteCommand.
    command = new OleDbCommand(
        "DELETE * FROM Customers WHERE CustomerID = ?",
        connection);

    parameter = command.Parameters.Add(
        "CustomerID", OleDbType.Char, 5, "CustomerID");
    parameter.SourceVersion = DataRowVersion.Original;

    dataAdapter.DeleteCommand = command;

    return dataAdapter;
}

Public Shared Function CreateCustomerAdapter( _
    connection As OleDbConnection) As OleDbDataAdapter 

    Dim dataAdapter As New OleDbDataAdapter()
    Dim command As OleDbCommand
    Dim parameter As OleDbParameter

    ' Create the SelectCommand.
    command = New OleDbCommand("SELECT CustomerID FROM Customers " & _
        "WHERE Country = ? AND City = ?", connection)

    command.Parameters.Add("Country", OleDbType.VarChar, 15)
    command.Parameters.Add("City", OleDbType.VarChar, 15)

    dataAdapter.SelectCommand = command

    ' Create the DeleteCommand.
    command = New OleDbCommand( _
        "DELETE * FROM Customers WHERE CustomerID = ?", _
        connection)

    parameter = command.Parameters.Add( _
        "CustomerID", OleDbType.Char, 5, "CustomerID")
    parameter.SourceVersion = DataRowVersion.Original

    dataAdapter.DeleteCommand = command

    Return dataAdapter
End Function

備註

在 期間Update，如果未設定此屬性且主鍵資訊存在於 中DataSet，則如果您設定 SelectCommand 屬性並使用 OleDbCommandBuilder，DeleteCommand則會自動產生 。 然後，您未設定的任何其他命令都會由 OleDbCommandBuilder產生。 此產生邏輯需要中 DataSet存在索引鍵數據行資訊。 如需詳細資訊，請參閱使用 CommandBuilder 產生命令。

當 指定先前建立OleDbCommand的時DeleteCommand，OleDbCommand不會複製 。 會 DeleteCommand 維護先前建立 OleDbCommand 之 對象的參考。

另請參閱

• DataAdapter 和 DataReader