ADO.NET调用存储过程

1.调用具有输入参数和返回结果的存储过程

-------------------建表------------------

CREATE TABLE [tab_cJ] (
[id] [int] IDENTITY (1, 1) NOT NULL PRIMARY KEY,
[name] [varchar] (50) ,
[age] [int] NULL ,
[info] [varchar] (200)
)  

------------------建存储过程-------------------------

CREATE PROCEDURE QueryInfoByName
@name varchar(50),
@age int
AS
select info from tab_cj where [name]=@name and age=@age
GO 

--------------------调用-------------------------------

using (SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=test;Integrated Security=True"))
        {
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandType = CommandType.StoredProcedure; //指定执行存储过程操作
            cmd.CommandText = "QueryInfoByName"; //存储过程名称 
            //对应存储过程QueryInfoByName的第一个参数@name
            SqlParameter parName = new SqlParameter("@name", SqlDbType.VarChar, 50);
            //指定参数@name要转入的值
            parName.Value = "aa";
            //对应存储过程QueryInfoByName的第二个参数@age
            SqlParameter parAge = new SqlParameter("@age", SqlDbType.Int);
            //指定参数@age要转入的值
            parAge.Value = 12;

            //这一步非常重要，一定将设置好的两个参数类型添加到Command对象的参数集合里
            cmd.Parameters.Add(parName);
            cmd.Parameters.Add(parAge);

            //方式一，查询回来的结果需要显示在DataGrid之类的控件上
            DataSet ds = new DataSet();
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            adapter.Fill(ds);

            //方式二，按单个值读取 
            conn.Open();
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.HasRows)
            {
                while (reader.Read())
                {
                    Response.Write(reader.GetString(0));
                }
            }
        }

2.调用具有输出参数的存储过程

------------------建存储过程-------------------------

create procedure getAge
(
@name varchar(50),
@age int output
)
as
select @age=age from tab_cJ where [name]=@name

--------------------调用-------------------------------

using (SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=test;Integrated Security=True"))
        {
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandType = CommandType.StoredProcedure; //指定执行存储过程操作
            cmd.CommandText = "getAge"; //存储过程名称 
            SqlParameter parName = new SqlParameter("@name", SqlDbType.VarChar, 50);
            parName.Value = "aa";
            //对应存储过程getAge的输出参数@age
            SqlParameter parAge = new SqlParameter("@age", SqlDbType.Int);
            parAge.Direction = ParameterDirection.Output;
            cmd.Parameters.Add(parName);
            cmd.Parameters.Add(parAge);
            try
            {
                conn.Open();
                cmd.ExecuteNonQuery();
                int i = int.Parse(parAge.Value.ToString());
                Response.Write(i.ToString());
                conn.Close();
            }
            catch(Exception ex)
            {
                Response.Write(ex.ToString());
            }
            
        }