我很难从 SQL Server 获取输出值。
这是我的存储过程:
ALTER PROCEDURE [dbo].[Insert_UnknownCustomer_Quote_Document]
-- Add the parameters for the stored procedure here
@NewDocumentFileName nvarchar(100),
@NewDocumentWordCount int,
@NewQuoteAmount money,
@NewQuoteNumber int OUTPUT = 0
AS
DECLARE @Today datetime
SELECT @Today = GETDATE()
BEGIN TRANSACTION
BEGIN TRY
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
INSERT INTO dbo.Customers(DateAdded)
VALUES (@Today)
INSERT INTO dbo.Quotes(CustomerID, QuoteAmount, QuoteDate)
VALUES (@@IDENTITY, @NewQuoteAmount, @Today)
SELECT @NewQuoteNumber = @@IDENTITY
INSERT INTO dbo.DocumentFiles(QuoteNumber, DocumentFileName, DocumentFileWordCount)
VALUES (@NewQuoteNumber, @NewDocumentFileName, @NewDocumentWordCount)
-- Return quote number
RETURN @NewQuoteNumber
END
COMMIT TRANSACTION
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION
PRINT 'Transaction rolled back.'
END CATCH
这是我的 C#:
SqlParameter returnQuoteNumber = new SqlParameter("@NewQuoteNumber", SqlDbType.Int);
returnQuoteNumber.Direction = ParameterDirection.ReturnValue;
newSQLCommand.Parameters.Add(returnQuoteNumber);
这是我现在收到的错误:
Procedure or function 'Insert_UnknownCustomer_Quote_Document' expects parameter '@NewQuoteNumber', which was not supplied.
我试过从开头取出@NewQuoteNumber 并将其放在带有 DECLARE 的 AS 之后，但这也会产生错误。
最佳答案
你想要 ParameterDirection.Output 而不是 ParameterDirection.ReturnValue
也把它从return部分拿出来，return应该用来返回状态而不是值
如果你确实使用 return，我会在事务提交之后而不是之前做
关于sql-server - 通过存储过程和 c# 从 SQL Server 返回输出参数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10645730/