可能会是一个容易回答的问题。我有这样的过程:
CREATE PROCEDURE [DBO]。[AccountExists] @UserName为nvarchar(16) 如 IF EXISTS(SELECT ID从客户其中username = @用户名) 选择1 否则选择0当我有ADO.NET code调用该程序并执行这样的:
返回Convert.ToBoolean(sproc.ExecuteScalar());
true或false返回。
当我更改存储过程返回1或0,而不是选择:
ALTER PROCEDURE [DBO]。[AccountExists] @UserName为nvarchar(16) 如 IF EXISTS(SELECT ID从客户其中username = @用户名) 返回1 否则返回0
sproc.ExecuteScalar()返回null。如果我尝试sproc.ExecuteNonQuery()来代替,则返回-1。
我如何在ADO.NET一回存储过程的结果?
我需要AccountExists至RETURN,而不是选择的,所以我可以有另外一个存储过程调用它:
- 另一个程序插入或更新帐户 DECLARE @exists位 EXEC @exists = [DBO]。[AccountExists] @UserName @如果存在= 1 --update账户 其他 --insert acocunt解决方案
ParameterDirection.ReturnValue 添加参数的命令,使用。返回值将在present在执行后,参数中。
Probably an easy-to-answer question. I have this procedure:
CREATE PROCEDURE [dbo].[AccountExists] @UserName nvarchar(16) AS IF EXISTS (SELECT Id FROM Account WHERE UserName=@UserName) SELECT 1 ELSE SELECT 0When I have ADO.NET code that calls this procedure and does this:
return Convert.ToBoolean(sproc.ExecuteScalar());Either true or false is returned.
When I change the stored procedure to RETURN 1 or 0 instead of SELECT:
ALTER PROCEDURE [dbo].[AccountExists] @UserName nvarchar(16) AS IF EXISTS (SELECT Id FROM Account WHERE UserName=@UserName) RETURN 1 ELSE RETURN 0sproc.ExecuteScalar() returns null. If I try sproc.ExecuteNonQuery() instead, -1 is returned.
How do I get the result of a stored procedure with a RETURN in ADO.NET?
I need AccountExists to RETURN instead of SELECT so I can have another stored procedure call it:
--another procedure to insert or update account DECLARE @exists bit EXEC @exists = [dbo].[AccountExists] @UserName IF @exists=1 --update account ELSE --insert acocunt解决方案
Add a parameter to the command, using ParameterDirection.ReturnValue. The return value will be present in the paramter after the execution.
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