存储过程中MVC5没有返回值 [英] Store Procedure not return value in MVC5

问题描述

我在MVC5通过分贝的工作方式与实体框架。我使用MySQL作为数据库。我创建了一个程序，并在拨打步骤在MySQL它的工作为我的意料。但是，当我在MVC中使用的过程还给每一次0。

I am working in MVC5 with Entity Framework through db approach. I use Mysql as database. I create a procedure and when Call Procedure in Mysql it work as my expectation. But when i use procedure in MVC it return every time 0.

存储过程

CREATE PROCEDURE `checkSeasonAvailability`( 
    IN paramSeasonId INT,   
    IN paramHotelId INT,
    IN paramStartDate varchar(20),
    IN paramEndDate varchar(20)
)
BEGIN
    DECLARE _startDate,_endDate DATETIME;
    DECLARE _hotelseasonID BIGINT(20);
    DECLARE _count,_rowCount,_dateDiff INT;
    DECLARE _index INT DEFAULT 1;
    DECLARE i INT DEFAULT 0;
    DECLARE cursorSeasonList CURSOR FOR SELECT `hotel_season_id`,`start_date`,`end_date`
            FROM    hotel_season_link
            WHERE   hotel_id    =   paramHotelId        &&
                    season_id   =   paramSeasonId       &&
                    active      =   TRUE;
    OPEN cursorSeasonList;
    SET _rowCount=FOUND_ROWS();
    SET _count=_rowCount;
    IF(_rowCount>0) THEN                    
        Proc:WHILE _index <= _rowCount DO
            FETCH cursorSeasonList INTO _hotelseasonID,_startDate,_endDate;
            SET _dateDiff=datediff(paramEndDate,paramStartDate);
            SET i=0;
            WHILE i <= _dateDiff DO

                SELECT COUNT(*) FROM hotel_season_link
                WHERE
                        adddate(paramStartDate,i) BETWEEN _startDate AND _endDate INTO _count;

                IF(_count>0) THEN
                    SELECT 1;
                    LEAVE Proc;     
                END IF;
                SET i=i+1;
            END WHILE;
        SET _index=_index+1;
        END WHILE;
    END IF;    
END

CALL checkSeasonAvailability(1,3,'2014-12-26 00:00:00','2014-12-31 00:00:00');//call in mysql

控制器

String format = "yyyy-MM-dd hh:mm:ss";
var status = db.checkSeasonAvailability(seasonId, hotelId, startDate.ToString(format), endDate.ToString(format));

在调试我的$ C C I找到所有需要的参数发送成功，但我没有得到返回值。
如果有任何事情错在我的code，所以请给我建议。

When i debug my code i find all required parameter send successfully but i didn't get return value. If any thing wrong in my code so please suggest me.

推荐答案

我自己解决这个问题。我做在存储过程和行为方式的变化。

i solve this problem by myself. I make changed in store procedure and action method.

我在为输出并存储在返回这个变量值的过程添加一个参数。

I add one more parameter in my procedure as OUTPUT and store return value in this variable.

OUT Flag int

SET Flag=0;
SELECT Flag;

然后使操作方法的变化。

Then make change in action method.

String format = "yyyy-MM-dd hh:mm:ss";
System.Data.Entity.Core.Objects.ObjectParameter flag = new System.Data.Entity.Core.Objects.ObjectParameter("flag", typeof(int));
var status = db.checkSeasonAvailability(hotelSeasonId,seasonId, hotelId, startDate.ToString(format), endDate.ToString(format), flag);

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