MVC 增 、删、 改、查 四种方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {
        //查
            RbacDBEntities db = new RbacDBEntities();
            //方式1 
            var roles1 = from r in db.Roles
                         where r.Name.Contains("主任")
                         select r;
            //方式2
            var roles2 = db.Roles
                .Where(p => p.Name.Contains("主任"))
                .Select(p => p).ToList();
            //方式3调用方sql
            string sql = @"select * from roles  where name like '%主任%'";
            db.Database.SqlQuery<Role>(sql);
            db.SaveChanges();
            //方式4，调用存储过程
          List<cp_select_role_Result> roles11=  db.cp_select_role("主任").ToList();
            Console.Read();

        }
       
       //删
        public static void Delete()
        {
            RbacDBEntities db = new RbacDBEntities();
            //方式1 Add
            Role r1 = db.Roles.Find(1074);
            db.Roles.Remove(r1);
            db.SaveChanges();
            //方式2
            Role r2 = new Role()
            {
                ID = 1075

            };
            db.Entry(r2).State = System.Data.Entity.EntityState.Deleted;
            db.SaveChanges();
            //方式3调用方sql
            string sql = @"delete roles  where id=1076";
            db.Database.ExecuteSqlCommand(sql);
            db.SaveChanges();
            //方式4，调用存储过程
            db.cp_delete_role(1077);
            Console.Read();
        }
			改
        public static void Edit()
        {
            RbacDBEntities db = new RbacDBEntities();
            //方式1 Add
            Role r1 = db.Roles.Find(1074);
            r1.Name = "修改1";
            r1.Remark = "修改备注1";
            db.SaveChanges();
            //方式2
            Role r2 = new Role()
            {
                ID = 1075,
                Name = "修改2",
                Remark = "修改备注2"
            };
            db.Entry(r2).State = System.Data.Entity.EntityState.Modified;
            db.SaveChanges();
            //方式3调用方sql
            string sql = @"update roles set name='修改3',remark='修改备注3' where id=1076";
            db.Database.ExecuteSqlCommand(sql);
            db.SaveChanges();
            //方式4，调用存储过程
            db.cp_update_role(1077, "修改4", "修改备注4");
            Console.Read();

        }
     //添加
        public static void ADD()
        {
            RbacDBEntities db = new RbacDBEntities();
            //方式1 Add
            Role r1 = new Role()
            {
                Name = "方式1",
                Remark = "备注1"
            };
            db.Roles.Add(r1);
            db.SaveChanges();
            //方式2
            Role r2 = new Role()
            {
                Name = "方式2",
                Remark = "备注2"
            };
            db.Entry(r2).State = System.Data.Entity.EntityState.Added;
            db.SaveChanges();
            //方式3调用方sql
            string sql = @"insert into roles values('方式3','备注3')";
            db.Database.ExecuteSqlCommand(sql);
            db.SaveChanges();
            //方式4，调用存储过程
            db.cp_insert_role("方法4", "备注4");
            Console.Read();
        }
    }
}