C# 读取数据库存储过程返回值 笔记

是笔记 所以代码没有优化。一切从简

存储过程：

方法1：返回一个集合,此方法灵活。

ALTER PROCEDURE [dbo].[Porc_temp]
 AS 
 BEGIN
  select * from admin ;
 END 

代码：

        public ActionResult Index()
        {
            DataTable dt;
            string conString = "server=.;database=xx;uid=sa;pwd=xxx;";
            using (SqlConnection con = new SqlConnection(conString))
            {
                SqlCommand com = con.CreateCommand();
                com.CommandText = "Porc_temp";//和存储过程名称要一致
                com.CommandType = CommandType.StoredProcedure;
                SqlDataAdapter da = new SqlDataAdapter(com);
                DataSet ds = new DataSet();
                da.Fill(ds);
                dt = ds.Tables[0];
            }
            return View(dt);
        }

方法2：存储过程返回单个的值。

 ALTER PROCEDURE [dbo].[porc_retrun] 
 AS 
  BEGIN  
  return 1;
 END

代码：

        public ActionResult Details(int id)
        {
            string conString = "server=.;database=xx;uid=sa;pwd=xxx;";
            using (SqlConnection con = new SqlConnection(conString))
            {
                SqlCommand com = con.CreateCommand();
                com.CommandText = "porc_retrun";
                com.CommandType = CommandType.StoredProcedure;
                SqlParameter parms = new SqlParameter("@returnValue", SqlDbType.Int);
                parms.Direction = ParameterDirection.ReturnValue;
                com.Parameters.Add(parms);
                con.Open();
                int result = com.ExecuteNonQuery();
                string std_id = com.Parameters["@returnValue"].Value.ToString();
                ViewBag.id = std_id;
            }
            return View();
        }

3：存储过程指定参数返回,其实也有点类似方法2

存储过程：

         ALTER PROCEDURE [dbo].[Proc_add]
          @st_id int output,//指定返回的参数
          @userName varchar(20),
          @pwd varchar(20)
         AS
          BEGIN
             insert into admin values(@userName,@pwd);
             select @st_id=@@identity;
          END

代码：

        public ActionResult Create(FormCollection collection)
        {
            string conString = "server=.;database=xx;uid=sa;pwd=xxx;";
            using (SqlConnection con = new SqlConnection(conString))
            {
                SqlCommand com = con.CreateCommand();
                com.CommandText = "Proc_add";
                com.CommandType = CommandType.StoredProcedure;
                SqlParameter[] parms = { 
                                        new SqlParameter("@st_id",SqlDbType.Int),
                                        new SqlParameter("@userName",SqlDbType.VarChar),
                                        new SqlParameter("@pwd",SqlDbType.VarChar)
                                       };
                parms[0].Direction = ParameterDirection.Output;
                parms[1].Value = "sp";
                parms[2].Value = "112102";
                com.Parameters.AddRange(parms);
                con.Open();
                int result = com.ExecuteNonQuery();
                string std_id = com.Parameters["@st_id"].Value.ToString();
                ViewBag.id = std_id;
            }
            return View();
        }