| 1，ADO.NET访问SQL Server调用存储过程带回参 |
use northwind
go
--存储过程1
--插入一条商品 productname=芹菜 unitprice=2.3
create proc p_insert
@productname varchar(40),
@unitprice money
as
insert products(productname,unitprice)
values(@productname,@unitprice)
go
--执行
exec p_insert '芹菜',2.3
--存储过程2
--查全部商品
create proc p_selectall
as
select * from products
go
--执行
exec p_selectall
--存储过程3
--根据商品编号=1,商品名称和单价
create proc p_selectbyid
@productid int, --入参
@productname varchar(40) output,--出参
@unitprice money output --出参
as
select @productname=productname,@unitprice=unitprice from products where productid=@productid
--执行
declare @name varchar(40)
declare @price money
exec p_selectbyid @productname=@name output, @unitprice=@price output, @productid=1
select @name,@price
3.1，Program.cs
using System;
using System.Data.SqlClient;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
////测试存储过程1
// SqlConnection con = new Com.Myt.DB.DBConnection().Con;
// SqlCommand com = con.CreateCommand();
// com.CommandText = "usp_insert";
// com.CommandType = System.Data.CommandType.StoredProcedure;//命令的类型是储存过程
// com.Parameters.Add(new SqlParameter("@productname", "苹果"));
// com.Parameters.Add(new SqlParameter("@unitprice", 200));
// con.Open();
// int count= com.ExecuteNonQuery();
// con.Close();
// Console.WriteLine("一共影响了"+count+"行");
////存储过程2，测试返回结果集
//SqlConnection con = new Com.Myt.DB.DBConnection().Con;
//SqlCommand com = con.CreateCommand();
//com.CommandText = "usp_selectall";
//com.CommandType = System.Data.CommandType.StoredProcedure;
//con.Open();
//SqlDataReader sdr = com.ExecuteReader();
//while (sdr.Read())
//{
// Console.WriteLine(sdr.GetString(0)+"\t"+sdr.GetDecimal(1));
//}
//com.Clone();
//存储过程3，测试输出参数
//已知商品编号，查名称和单价
SqlConnection con = new Com.Myt.DB.DBConnection().Con;
SqlCommand com = con.CreateCommand();
com.CommandText = "usp_selectbyid";
com.CommandType = System.Data.CommandType.StoredProcedure;
//配参，注意出参的配置
//入参
com.Parameters.Add(new SqlParameter("@productid", ));
//出参
SqlParameter p1 = new SqlParameter("@productname", System.Data.SqlDbType.VarChar, );
SqlParameter p2 = new SqlParameter("@unitproduct", System.Data.SqlDbType.Decimal);
//标明输出方向
p1.Direction = System.Data.ParameterDirection.Output;
p2.Direction = System.Data.ParameterDirection.Output;
com.Parameters.Add(p1);
com.Parameters.Add(p2);
con.Open();
com.ExecuteNonQuery();
con.Close();
Console.WriteLine(p1.Value+", "+p2.Value);
}
}
}
3.2，DBConnection.cs