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SQL code:
select * from users

insert into users values('xjs','xjs','½ûÒ©')

create proc useproc
@msg varchar(50)
as
begin
set @msg = (select use_nc from users where use_name='xjs')
print @msg
end

drop proc useproc

declare @msg varchar(50)
exec useproc @msg

ÔÚsql2005ÖÐÖ´Ðнá¹ûÊÇ£º¡°½ûÒ©¡±
ÏÂÃæÊÇÎÒÔÚc#ÖеĴúÂë
C# code:
SqlConnection conn=new SqlConnection(sConn);
¡¡¡¡ SqlDataAdapter da = new SqlDataAdapter();
SqlParameter param = new SqlParameter();
da.SelectCommand = new SqlCommand();
conn.Open();

¡¡¡¡
¡¡¡¡ da.SelectCommand.Connection = conn;
da.SelectCommand.CommandText = "useproc";
¡¡¡¡ da.SelectCommand.CommandType = CommandType.StoredProcedure;

param = new SqlParameter("@msg", SqlDbType.VarChar);
param.Direction = ParameterDirection.Input;
param.Value = Convert.ToString("msg");
da.SelectCommand.Parameters.Add(param);

object msg = da.SelectCommand.ExecuteScalar();

ÎÒµÄÒâ˼¾ÍÊÇÏëÒªÊä³öÉÏÃæSQLÖеġ°½ûÒ©¡±£¬µ¥ÊÇÎÒû×öµ½£¬object msg = da.SelectCommand.ExecuteScalar();Õâ¾ä»°·µ»ØµÄ¶ÔÏóÊÇnull¡£ÎÒ²»ÖªµÀ¸ÃÔõô×ö¡£ÇëÎÊÏ´ó¼Ò¡£Ð»Ð»
C# code


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