C# 获取存储过程 返回的参数Output

public  IList<Gname> GetReadFlei(int fid)
        {
            SqlParameter[] par = { new SqlParameter("@fid",fid),
                                  new SqlParameter("@RecordCount",SqlDbType.NVarChar,30)
                                 };
            par[1].Direction = ParameterDirection.Output;

            SqlDataReader DR = SQLHelp.ExecuteReader("StroGetTest", CommandType.StoredProcedure, par);
            IList<Gname> List = new List<Gname>();
           
            while (DR.Read())
            {
                Gname sw = new Gname();
                sw.id = DR.GetInt32(0);
                sw.gname = DR.GetString(1);
                sw.gdir = DR.GetString(2);
                sw.gfla = DR.GetString(3);
                List.Add(sw);
            }
            
            DR.Close();
            this.Label1.Text = par[1].Value.ToString();
            
            return List;
        }

public static SqlDataReader ExecuteReader(string cmdText, CommandType cmdType, params SqlParameter[] cmdParms) 

        {
            SqlCommand cmd = new SqlCommand();
            SqlConnection conn = new SqlConnection(Constr);

            try
            {
                ProCommand(cmd, conn, cmdText, cmdType,cmdParms);
                SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                //cmd.Parameters.Clear();//放到这里，返回参数会被清空。
                return rdr;
            }
            catch
            {
                conn.Close();
                throw;
            }
        }

注意：cmd.Parameters.Clear()不能用，否用返回参数会被清空

CREATE PROCEDURE  StroGetTest
@fid int ,
@RecordCount NVarChar(30) Output
AS

SELECT @RecordCount=count(1) FROM gname WHERE fid=@fid;
SELECT id,gname,gdir,gfla FROM Gname WHERE fid=@fid;
GO