MVC test

1,index

@{
    ViewBag.Title = "Index";
}





    
    
    


    
        @foreach (test.Models.tb_name item in ViewData["DataList"] as List)
        {
            
        }
    

        

            
id
            
姓名
            
状态
            
编辑
        
        

                
@item.Id
                
@item.uName
                
@item.uMark
                

                @Html.ActionLink("删除", "Del", new { id = item.Id })
                @Html.ActionLink("修改", "Update", new { id = item.Id })
                @Html.ActionLink("添加", "Add")
            

2，添加视图

@model test.Models.tb_name
@{
    ViewBag.Title = "Add";
}




    
    
    


    
Create


    @using (Html.BeginForm())
    {
        @Html.ValidationSummary(true)
        

            
Student

            

                @Html.LabelFor(model => model.uName)
            
            

                @Html.EditorFor(model => model.uName)
                @Html.ValidationMessageFor(model => model.uName)
            
            

                @Html.LabelFor(model => model.uMark)
            
            

                @Html.EditorFor(model => model.uMark)
                @Html.ValidationMessageFor(model => model.uMark)
            
            

                
            
        
    }
    

        @Html.ActionLink("Back to List", "Index")
    

3，修改视图

@model test.Models.tb_name
@{
    ViewBag.Title = "Update";
}





    
    
    


    @using (Html.BeginForm("Update", "Index", FormMethod.Post))
    {
        

            

                
修改：@Html.HiddenFor(a => a.Id)
            
            

                
课程名称
                
                
@Html.DropDownListFor(a => a.Id, ViewBag.classList as IEnumerable)
            
            

                
学生姓名
                
                
@Html.TextBoxFor(a => a.uName)
            
            

                

                    @Html.ActionLink("返回", "Index", "Index")
            
        
    }

4，控制器

public class IndexController : Controller
    {

        testEntities db = new testEntities();
        //
        // GET: /Index/

        public ActionResult Index()
        {
            testEntities db = new testEntities();
            List list = (from d in db.tb_name select d).ToList();
            ViewData["DataList"] = list;
            return View();
        }

        /// 根据学生ID删除学生
        /// 
        /// 学生ID
        /// 
        [HttpGet]
        public ActionResult Del(string id)
        {
            testEntities db = new testEntities();
            int ids = Convert.ToInt32(id);
            tb_name modelDel = new tb_name() { Id = ids };
            db.tb_name.Attach(modelDel);
            db.Entry(modelDel).State = System.Data.EntityState.Deleted;
            db.SaveChanges();
            return RedirectToAction("Index", "Index");
        }


        /// 

        /// 根据学生编号修改学生
        /// 
        /// 
        /// 
        [HttpGet]
        public ActionResult Update(string id)
        {
            int ids = Convert.ToInt32(id);
            tb_name ts = (from a in db.tb_name where a.Id == ids select a).FirstOrDefault();
            IEnumerable listItem = (from c in db.tb_name select c).ToList().Select(c => new SelectListItem { Value = c.Id.ToString(), Text = c.uName });

            ViewBag.classList = listItem;
            return View(ts);

        }


        [HttpPost]
        /// 

        /// 保存要修改的数据
        /// 
        /// 要修改的学生ID
        /// 
        public ActionResult Update(tb_name ts)
        {
            DbEntityEntry entry = db.Entry(ts);
            entry.State = System.Data.EntityState.Unchanged;
            entry.Property(a => a.uName).IsModified = true;
            entry.Property(a => a.Id).IsModified = true;
            db.SaveChanges();
            return RedirectToAction("Index", "Index");
        }


        public ActionResult Add()
        {
            return View("Add");
        }

        /// 

        /// 添加
        /// 
        /// 
        [HttpPost]
        public ActionResult Add(tb_name student)
        {
            try
            {
                if (ModelState.IsValid)
                {
                    EntityState statebefore = db.Entry(student).State;  //Detached 
                    db.tb_name.Add(student);
                    EntityState stateAdd = db.Entry(student).State; //Added
                    db.SaveChanges();
                    EntityState stateafter = db.Entry(student).State;//Unchanged
                    return RedirectToAction("Index");
                }
            }
            catch
            {
                ModelState.AddModelError("", "Unable to save changes. Try again, and if the problem persists see your system administrator.");


            }
            return View(student);
        }
    }