C# 如何设置参数方向?
在我的代码中,我想指定参数方向,但不知道如何做C# 如何设置参数方向?,c#,asp.net,sql-server,sql-parametrized-query,C#,Asp.net,Sql Server,Sql Parametrized Query,在我的代码中,我想指定参数方向,但不知道如何做 Dim sqlParam(0 To 3) As SqlParameter sqlParam(0) = New SqlParameter("@reg", SqlDbType.VarChar, 20) sqlParam(0).Value = reg sqlParam(1) = New SqlParameter("@action_code", SqlDbType.VarChar, 30) sqlParam(1).Value = act
Dim sqlParam(0 To 3) As SqlParameter
sqlParam(0) = New SqlParameter("@reg", SqlDbType.VarChar, 20)
sqlParam(0).Value = reg
sqlParam(1) = New SqlParameter("@action_code", SqlDbType.VarChar, 30)
sqlParam(1).Value = action_code
sqlParam(2) = New SqlParameter("@user", SqlDbType.VarChar, 40)
sqlParam(2).Value = Session("user_code").ToString()
sqlParam(3) = New SqlParameter("@@ret_val", SqlDbType.[Char], 1, )
我想为“@@ret_val”指定参数direction 假设您正在调用存储过程,并且对其返回值感兴趣:
sqlParam(3).Direction = ParameterDirection.ReturnValue
如果是输出参数,请尝试:
sqlParam(3).Direction = ParameterDirection.Output
或者去看看这本书