ExamWeb/Controllers/TeacherController.cs

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using ExamWeb.Models;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace ExamWeb.Controllers
{
    public class TeacherController : Controller
    {
        // GET: Teacher
        public ActionResult Index()
        {
            using (ExamDBEntities db = new ExamDBEntities())
            {
                var result = db.Teacher.ToList();
                ViewBag.Teacher = result;
            }
            return View();
        }

        //新增教师
        public ActionResult Create()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Create(Teacher teacher)
        {
            using (ExamDBEntities db = new ExamDBEntities())
            {
                try
                {
                    var result = db.Teacher.Add(teacher);
                    db.SaveChanges();
                }
                catch (Exception)
                {
                    throw;
                }

            }
            return RedirectToAction("Index");
        }

        //修改
        [HttpPost]
        public ActionResult Eidt(Teacher teacher)
        {
            using (ExamDBEntities db = new ExamDBEntities())
            {
                try
                {
                    db.Entry(teacher).State = EntityState.Modified;
                    db.SaveChanges();
                }
                catch (Exception e)
                {