C# 返回由INSERT添加的新ID

在向数据库添加数据后，如何获得唯一ID？有没有一种简单的方法可以做到这一点？

如果您的ID列是INT-IDENTITY类型，那么您可以使用SCOPE\u-IDENTITY函数：

ALTER PROCEDURE [dbo].[SP_ADD_CUSTOMER]
(
    @CUSTOMER_NAME VARCHAR(100)
)
AS
BEGIN
    INSERT INTO CUSTOMER
    (    
       CUSTOMER_NAME
    )
    VALUES
    (
       @CUSTOMER_NAME 
    )
END

---

这是假设您的唯一ID是一个标识列。如果不是这样，请澄清你的问题

ALTER PROCEDURE [dbo].[SP_ADD_CUSTOMER]
   (@CUSTOMER_NAME VARCHAR(100))
AS
BEGIN
    INSERT INTO CUSTOMER(CUSTOMER_NAME)
    VALUES(@CUSTOMER_NAME)

    SELECT SCOPE_IDENTITY()  -- this will retrieve and send back the newly inserted IDENTITY value
END

---

作为旁白。另外，.

其他答案已经向您展示了如何获取标识（如果是标识）。我读取了唯一ID，并假设您的ID是唯一标识符。首先，我创建了一个如下表：

ALTER PROCEDURE [dbo].[SP_ADD_CUSTOMER]
  @CUSTOMER_NAME VARCHAR(100),
  @NewID INT OUTPUT
AS
BEGIN
    INSERT dbo.CUSTOMER(CUSTOMER_NAME) SELECT @CUSTOMER_NAME;
    SET @NewID = SCOPE_IDENTITY();
END
GO

CREATE TABLE [dbo].[CUSTOMER](
    [CUSTOMER_ID] [uniqueidentifier] NOT NULL,
    [CUSTOMER_NAME] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_CUSTOMER] PRIMARY KEY CLUSTERED 
(
    [CUSTOMER_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,     ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

然后，我创建了一个如下所示的存储过程：

ALTER PROCEDURE [dbo].[SP_ADD_CUSTOMER]
  @CUSTOMER_NAME VARCHAR(100),
  @NewID INT OUTPUT
AS
BEGIN
    INSERT dbo.CUSTOMER(CUSTOMER_NAME) SELECT @CUSTOMER_NAME;
    SET @NewID = SCOPE_IDENTITY();
END
GO

CREATE TABLE [dbo].[CUSTOMER](
    [CUSTOMER_ID] [uniqueidentifier] NOT NULL,
    [CUSTOMER_NAME] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_CUSTOMER] PRIMARY KEY CLUSTERED 
(
    [CUSTOMER_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,     ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

最后，我执行了存储过程并取回了新的客户ID：

CREATE PROCEDURE [dbo].[SP_ADD_CUSTOMER]
(
    @CUSTOMER_NAME VARCHAR(100)
)
AS
BEGIN
    DECLARE @CUSTOMER_ID UNIQUEIDENTIFIER = NEWID()

    INSERT INTO CUSTOMER
    (
        CUSTOMER_ID,
        CUSTOMER_NAME
    )
    VALUES
    (
        @CUSTOMER_ID,
        @CUSTOMER_NAME 
    )

    SELECT @CUSTOMER_ID AS CUSTOMER_ID
END

---

我希望这有帮助

ID是标识列吗？旁注：存储过程不应使用sp_uuu前缀。微软已经这样做了，而且你确实有可能在将来的某个时候发生名称冲突。最好只是简单地避免使用sp_u，并使用其他东西作为前缀——或者根本不使用前缀@marc_s+1，你需要更好地定义你所说的唯一ID是什么意思-这是一个标识列，一个默认为NEWID或NEWSEQUENTIALID的唯一标识符，完全是其他的东西…选择@CUSTOMER_ID，因为CUSTOMER_ID有语法错误，你能再次检查你的示例吗？user2869820语法正确，没有错误。你确定你正在运行整个代码块而不仅仅是选择@CUSTOMER\u ID作为CUSTOMER\u ID吗？我编辑了答案以提供你所需的所有代码。