HOW TO：使用 EntityCommand 執行參數化預存程序 (EntityClient)

本主題提供如何使用 EntityCommand 執行參數化預存程序的範例。這個範例使用 HOW TO：定義具有預存程序的模型 (Entity Framework) 中實作的預存程序和資料模型。如需設定專案的詳細資訊，以及如何使用物件服務執行預存程序的範例，請參閱 HOW TO：使用預存程序執行查詢 (Entity Framework)。

範例

以下程式碼會執行參數化預存程序，其中 SalesOrderHeaderId 是必要的參數。然後 EntityDataReader 將會讀取結果。

Using conn As EntityConnection = New EntityConnection("name=AdventureWorksEntities")
    conn.Open()

    Try

        ' Create an EntityCommand.
        Using cmd As EntityCommand = conn.CreateCommand()
            cmd.CommandText = "AdventureWorksEntities.GetOrderDetails"
            cmd.CommandType = CommandType.StoredProcedure
            Dim param As New EntityParameter()
            param.Value = "43659"
            param.ParameterName = "SalesOrderHeaderId"
            cmd.Parameters.Add(param)

            Using rdr As EntityDataReader = cmd.ExecuteReader(CommandBehavior.SequentialAccess)
                Do While rdr.Read
                    ' Read the results returned by the stored procedure.
                    Console.WriteLine("Header#: {0} " & _
                    "Order#: {1} ProductID: {2} Quantity: {3} Price: {4}", _
                    rdr.Item(0), rdr.Item(1), rdr.Item(2), rdr.Item(3), rdr.Item(4))
                Loop
            End Using
        End Using
    Catch ex As EntityException
        Console.WriteLine(ex.ToString())
    End Try
    conn.Close()
End Using

using (EntityConnection conn =
    new EntityConnection("name=AdventureWorksEntities"))
{
    conn.Open();
    try
    {
        // Create an EntityCommand.
        using (EntityCommand cmd = conn.CreateCommand())
        {
            cmd.CommandText = "AdventureWorksEntities.GetOrderDetails";
            cmd.CommandType = CommandType.StoredProcedure;
            EntityParameter param = new EntityParameter();
            param.Value = "43659";
            param.ParameterName = "SalesOrderHeaderId";
            cmd.Parameters.Add(param);

            // Execute the command.
            using (EntityDataReader rdr =
                cmd.ExecuteReader(CommandBehavior.SequentialAccess))
            {
                // Read the results returned by the stored procedure.
                while (rdr.Read())
                {
                    Console.WriteLine("Header#: {0} " +
                    "Order#: {1} ProductID: {2} Quantity: {3} Price: {4}",
                    rdr[0], rdr[1], rdr[2], rdr[3], rdr[4]);
                }
            }
        }
    }
    catch (EntityException ex)
    {
        Console.WriteLine(ex.ToString());
    }
    conn.Close();
}

另請參閱

其他資源

使用 EntityClient (Entity Framework 工作)