C# 如何使用AddOutParameter从存储过程中获取输出参数

我试图从存储过程中获取输出参数

这是我的C#代码：

这是存储过程：

IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[pacquirelock]') AND type in (N'P', N'PC'))
    DROP PROCEDURE [dbo].[pacquirelock]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[pacquirelock]
    @processid INT,
    @description NVARCHAR(100),
    @servicecenterid INT,
    @loginid INT,
    @owner NVARCHAR(100),
    @lockacquired BIT OUTPUT
AS
BEGIN
    BEGIN TRANSACTION
        IF (SELECT COUNT(0) FROM tlock 
            WHERE islocked = 1 AND processid = @processid 
              AND (servicecenterid = @servicecenterid OR loginid = @loginid)) > 0
        BEGIN
            SET @lockacquired = 0
        END
        ELSE
        BEGIN
            INSERT INTO tlock (processid, description, servicecenterid, loginid, owner, islocked)
            VALUES (@processid, @description, @servicecenterid, @loginid, @owner, 1)

            SET @lockacquired = 1
        END 

        COMMIT TRANSACTION
END
GO

它总是false，但在db中设置为true

该命令得到正确执行，因为它向表中添加了一条新记录

AddOutParameter

不会检索任何参数作为输出

---

你知道如何解决这个问题吗？

你在使用哪个库？它看起来像是ADO.NET.Microsoft.Practices.EnterPriseLibrary.Data.Sql.SqlDatabaseOh（企业不良做法库）上的自制面纱。它来自于汇编：#区域汇编Microsoft.Practices.EnterPriseLibrary.Data，版本=6.0.0.0，区域性=中性，PublicKeyToken=31BF3856AD364E35在您强制转换输出参数的值时，您已经有了

0

。这不是问题所在。问题出在存储过程中。使用相同的参数在SSMS中运行它。

IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[pacquirelock]') AND type in (N'P', N'PC'))
    DROP PROCEDURE [dbo].[pacquirelock]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[pacquirelock]
    @processid INT,
    @description NVARCHAR(100),
    @servicecenterid INT,
    @loginid INT,
    @owner NVARCHAR(100),
    @lockacquired BIT OUTPUT
AS
BEGIN
    BEGIN TRANSACTION
        IF (SELECT COUNT(0) FROM tlock 
            WHERE islocked = 1 AND processid = @processid 
              AND (servicecenterid = @servicecenterid OR loginid = @loginid)) > 0
        BEGIN
            SET @lockacquired = 0
        END
        ELSE
        BEGIN
            INSERT INTO tlock (processid, description, servicecenterid, loginid, owner, islocked)
            VALUES (@processid, @description, @servicecenterid, @loginid, @owner, 1)

            SET @lockacquired = 1
        END 

        COMMIT TRANSACTION
END
GO