MVC 数据库增删改查（Razor）方法（1）和数据库

（一）主页面显示 代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplication1.Models;

namespace MvcApplication1.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/
        
        //主页视图
        public ActionResult Index()
        {
            List<student> list = new StudentDA().Select();
           // ViewBag.stu = new StudentDA().Select();
            return View(list);
        }

        //修改页面视图
        public ActionResult xiugai(string id)
        {
          //  ViewBag.data = new StudentDA().Select(id);
          student list = new StudentDA().Select(id);
            return View(list);
        }

        //更新修改按钮动作
        public ActionResult Update(string sno, string sname, string ssex, DateTime sbirthday, string class1)
        {
            try
            {
                new StudentDA().Update(sno, sname, ssex, sbirthday, class1);
                return RedirectToAction("Index");
            }
            catch (Exception)
            {

                return RedirectToAction("chucuo", "Home");
            }
        }

        //删除动作
        public ActionResult Delete(string id)
        {
            try
            {
                new StudentDA().Delete(id);
                return RedirectToAction("Index");
            }
            catch (Exception)
            {

                return RedirectToAction("Decuowu", "Home");
            }
        }

        //增加页面视图
        public ActionResult zengjia()
        {
            student a = new student();
            return View(a);
        }

        //添加按钮动作
        public ActionResult ADD(student a)
        {
            try
            {
                new StudentDA().Insert( a);
                return RedirectToAction("Index");
            }
            catch (Exception)
            {

                return RedirectToAction("chucuo","Home");
            }
        }

        //错误页面视图
        public ActionResult chucuo()
        {
            return View();
        }

        //删除错误页面视图
        public ActionResult Decuowu()
        {
            return View();
        }
        //回到主页按钮动作
        public ActionResult tiaozhuan()
        {
            return RedirectToAction("Index");
        }
    }
}

（二）往数据库里添加方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace MvcApplication1.Models
{
    public class StudentDA
    {
        private MyDbDataContext Context = new MyDbDataContext();

        //查询学生信息
        public List<student> Select()
        {
             return Context.student.ToList();
        }

        //按学号查询单个学生信息
        public student Select(string sno)
        {
            var query = Context.student.Where(p=>p.Sno==sno);
            if (query.Count()>0)
            {
                return query.First();
            }
            return null;
        }

        //插入增加数据库
        public void Insert(student a)
        {
           
            Context.student.InsertOnSubmit(a);
            Context.SubmitChanges();
        }

        //删除
        public void Delete(string sno)
        {
            var query = Context.student.Where(p=>p.Sno==sno);
            if (query.Count()>0)
            {
                student stu = query.First();
                Context.student.DeleteOnSubmit(stu);
                Context.SubmitChanges();
            }
        }

      //修改
        public void Update(string sno, string sname, string ssex, DateTime sbirthday, string class1)
        {
            var query = Context.student.Where(p => p.Sno == sno);
            if (query.Count() > 0)
            {
                student stu = query.First();
                stu.Sname = sname;
                stu.Ssex = ssex;
                stu.Sbirthday = sbirthday;
                stu.Class = class1;
                Context.SubmitChanges();
            }
        }
    }
}