一,实例
数据库创建存储过程
--修改
create proc cp_update_role
(
@id int,
@name varchar(50),
@remark varchar(200)
)
as
update roles set name=@name,remark=@remark where id=@id
select * from roles
--删除
create proc cp_delete_role
(
@id int
)
as
delete roles where id=@id
--查询
create proc cp_select_role
(
@name varchar(50)
)
as
select * from roles where name like
实例展示
修改的四种方式----------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
using (RbacDBEntities db = new RbacDBEntities()) {
//方式一
var role = db.Roles.Find(1);
role.Name = "方式一";
role.Remark = "备注一";
db.SaveChanges();
//方式二
Role role2 = new Role()
{
ID=2,
Name="方式二",
Remark="备注二"
};
db.Entry(role2).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
//方式三
string role3 = @"update roles set name=
db.Database.ExecuteSqlCommand(role3);
//方式四
db.cp_update_role(4,"方式四","备注四");
Console.Read();
}
}
}
}
删除的四种方式----------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
using (RbacDBEntities db = new RbacDBEntities()) {
//方式一
var role = db.Roles.Find(1);
db.Roles.Remove(role);
db.SaveChanges();
//方式二
Role role2 = new Role()
{
ID=5
};
db.Entry(role2).State = System.Data.Entity.EntityState.Deleted;
db.SaveChanges();
//方式三
string role3 = @"delete roles where id=5";
db.Database.ExecuteSqlCommand(role3);
//方式四
db.cp_delete_role(5);
Console.Read();
}
}
}
}
查询的四种方法----------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
using (RbacDBEntities db = new RbacDBEntities()) {
//方式一
var role = db.Roles.Where(p=>p.Name.Contains("主任")).ToList();
//方式二方法查询语法
var role2 = from p in db.Roles
where p.Name.Contains("方式")
select p;
//方式三调用sql语句
string role3 = @"select * from roles where name like
db.Database.SqlQuery<Role>(role3);
//方式四
db.cp_select_role("方法");
//或List<cp_select_role_Result> roles = db.cp_select_role("方法").ToList();
Console.Read();
}
}
}
}