建了一个存储过程,
CREATE proc sc_login
@LoginName varchar(20), -- 登录名
@Pwd varchar(20), -- 密码
@result int output --新生成的id值,输出
as...想得到该存储过程中执行后的@result的值,
SqlCommand mycmd = new SqlCommand();
mycmd.Connection = myconn;
mycmd.CommandType = CommandType.StoredProcedure;
mycmd.CommandText = "sc_login";
SqlParameter strLoginName = new SqlParameter("@LoginName", SqlDbType.VarChar, 20);
strLoginName.Value = tbLoginName.Text.ToString();
SqlParameter strPwd = new SqlParameter("@pwd", SqlDbType.VarChar, 20);
strPwd.Value = tbPwd.Text.ToString(); SqlParameter strResult = new SqlParameter("@result", SqlDbType.Int);
//该参数为返回值
strResult.Direction = ParameterDirection.Output; mycmd.Parameters.Add(strLoginName);
mycmd.Parameters.Add(strPwd);
mycmd.Parameters.Add(strResult); mycmd.ExecuteNonQuery();
string number = strResult.Value.ToString();
myconn.Close();
得不到参数的值?哪位给帮忙看一下?谢谢了!还有,带有output参数的存储过程在查询分析器中怎样调试的?exec name 'para1','para2','para3'提示出错,不知道咋回事?谢谢!
CREATE proc sc_login
@LoginName varchar(20), -- 登录名
@Pwd varchar(20), -- 密码
@result int output --新生成的id值,输出
as...想得到该存储过程中执行后的@result的值,
SqlCommand mycmd = new SqlCommand();
mycmd.Connection = myconn;
mycmd.CommandType = CommandType.StoredProcedure;
mycmd.CommandText = "sc_login";
SqlParameter strLoginName = new SqlParameter("@LoginName", SqlDbType.VarChar, 20);
strLoginName.Value = tbLoginName.Text.ToString();
SqlParameter strPwd = new SqlParameter("@pwd", SqlDbType.VarChar, 20);
strPwd.Value = tbPwd.Text.ToString(); SqlParameter strResult = new SqlParameter("@result", SqlDbType.Int);
//该参数为返回值
strResult.Direction = ParameterDirection.Output; mycmd.Parameters.Add(strLoginName);
mycmd.Parameters.Add(strPwd);
mycmd.Parameters.Add(strResult); mycmd.ExecuteNonQuery();
string number = strResult.Value.ToString();
myconn.Close();
得不到参数的值?哪位给帮忙看一下?谢谢了!还有,带有output参数的存储过程在查询分析器中怎样调试的?exec name 'para1','para2','para3'提示出错,不知道咋回事?谢谢!
OUTPUT 参数允许外部过程、批处理或多条 Transact-SQL 语句访问在过程执行期间设置的某个值。下面的示例创建一个存储过程 (titles_sum),并使用一个可选的输入参数和一个输出参数。首先,创建过程:USE pubs
GO
IF EXISTS(SELECT name FROM sysobjects
WHERE name = 'titles_sum' AND type = 'P')
DROP PROCEDURE titles_sum
GO
USE pubs
GO
CREATE PROCEDURE titles_sum @@TITLE varchar(40) = '%', @@SUM money OUTPUT
AS
SELECT 'Title Name' = title
FROM titles
WHERE title LIKE @@TITLE
SELECT @@SUM = SUM(price)
FROM titles
WHERE title LIKE @@TITLE
GO接下来,将该 OUTPUT 参数用于控制流语言。 说明 OUTPUT 变量必须在创建表和使用该变量时都进行定义。
参数名和变量名不一定要匹配,不过数据类型和参数位置必须匹配(除非使用 @@SUM = variable 形式)。 DECLARE @@TOTALCOST money
EXECUTE titles_sum 'The%', @@TOTALCOST OUTPUT
IF @@TOTALCOST < 200
BEGIN
PRINT ' '
PRINT 'All of these titles can be purchased for less than $200.'
END
ELSE
SELECT 'The total cost of these titles is $'
+ RTRIM(CAST(@@TOTALCOST AS varchar(20)))下面是结果集:Title Name
------------------------------------------------------------------------
The Busy Executive's Database Guide
The Gourmet Microwave
The Psychology of Computer Cooking(3 row(s) affected)Warning, null value eliminated from aggregate.
All of these titles can be purchased for less than $200.