为什么 EF Core 始终使用此存储过程 return -1？

Question

我正在尝试针对 Local 2016 数据库使用 EF Core（最新版本），但我每次都得到 -1。我不知道我做错了什么？

我知道它正在到达数据库。我查过了。

int returnCode = _dbContext.Database.ExecuteSqlCommand("CheckReceivedNotificationDuplicate @p0, @p1, @p2", 
parameters: new[] { sendMessage.MESSAGE_TEMPLATE_NAME, sendMessage.MESSAGE_SUBJECT, sendMessage.MESSAGE_TEXT_SUMMARY });

存储过程：

ALTER PROCEDURE [dbo].[CheckReceivedNotificationDuplicate]
@MESSAGE_TEMPLATE_NAME nvarchar(100),
@MESSAGE_SUBJECT nvarchar(255),
@MESSAGE_TEXT_SUMMARY nvarchar(4000)
AS  DECLARE @NMID Int
BEGIN   
IF  EXISTS (SELECT 1 FROM dbo.Notification WHERE MESSAGE_TEMPLATE_NAME = @MESSAGE_TEMPLATE_NAME
                and MESSAGE_SUBJECT = @MESSAGE_SUBJECT AND ReceiveTimeEST > dateadd(minute,-5, dbo.GetGMTtoEST(getutcdate())))
BEGIN 
    IF  EXISTS (SELECT 1 FROM dbo.Notification WHERE MESSAGE_TEMPLATE_NAME = @MESSAGE_TEMPLATE_NAME
                and MESSAGE_SUBJECT = @MESSAGE_SUBJECT AND MESSAGE_TEXT_SUMMARY = @MESSAGE_TEXT_SUMMARY
                AND ReceiveTimeEST > dateadd(minute,-5, dbo.GetGMTtoEST(getutcdate())))
        RETURN -99
    ELSE
        RETURN 0
END
ELSE
    RETURN 0
END

Answer 1

ExecuteSqlCommand 在内部调用 IRelationalCommand.ExecuteNonQuery。它 return 是受影响的行数。

为了 return 来自存储过程的任意值，将输出参数添加到它的声明中并 ExecuteSqlCommand 调用：

var outParameter = new SqlParameter("@outParameter", DbType.Int32)
{
    Direction = ParameterDirection.Output
};

context.Database.ExecuteSqlCommand("exec GetFoo @outParameter OUT", outParameter);

为什么 EF Core 始终使用此存储过程 return -1？

Why does EF Core always return -1 with this stored procedure?

entity-framework

localdb

entity-framework-core

.net-core