学习MVC第一个增删修功能的本记

1:首先是Model层（Model不仅仅是实体层，还有普通的三层BLL,DAL代码都写在这里的！ public class BLLStuedent{}）:

using System.ComponentModel.DataAnnotations;   //这个是验证的空间类;四种不同的；

namespace MvcLogin.Models
{
    public class Student
    {
        [Required(ErrorMessage = "ID不能为空")]
        public int Id { get; set; }

        [Required(ErrorMessage = "姓名不能为空")]
        public string Name { get; set; }

        [RegularExpression("^[\u7537\u5973]+$", ErrorMessage = "性别只能输入“男”或者“女”")]
        public string Sex { get; set; }

        [Range(1, 120, ErrorMessage = "年龄必须在1-120之间")]
        public int Age { get; set; }
    }
}

2:控制器的代码：

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

namespace MvcLogin.Controllers
{
   
    public class StudentController : Controller
    {
        static List<Student> students = new List<Student>();
        //
        // GET: /Student/

        public ActionResult Index()
        {
            return View(students);
        }

        //
        // GET: /Student/Details/5

        public ActionResult Details(Student s)
        {
            return View(s);
        }

        //
        // GET: /Student/Create

        public ActionResult Create()
        {
            return View();
        }

        //
        // POST: /Student/Create

        [HttpPost]
        public ActionResult Create(Student s)
        {
            try
            {
                // TODO: Add insert logic here
                if (!ModelState.IsValid)
                {
                    return View("Create", s);
                }
                students.Add(s);
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
       
        //
        // GET: /Student/Edit/5
 
        public ActionResult Edit(int id)
        {
            Student s = new Student();
            foreach (Student stu in students)
            {
                if (stu.Id == id)
                {
                    s.Id = stu.Id;
                    s.Name = stu.Name;
                    s.Sex = stu.Sex;
                    s.Age = stu.Age;
                }
            }
            return View(s);
        }

        //
        // POST: /Student/Edit/5

        [HttpPost]
        public ActionResult Edit(Student s)
        {
            try
            {
                // TODO: Add update logic here
                if (!ModelState.IsValid)
                {
                    return View("Edit", s);
                }
                foreach (Student stu in students)
                {
                    if (stu.Id == s.Id)
                    {
                        stu.Id = s.Id;
                        stu.Name = s.Name;
                        stu.Sex = s.Sex;
                        stu.Age = s.Age;
                    }
                }
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

        //
        // GET: /Student/Delete/5
 
        public ActionResult Delete(int id)
        {
            Student s = new Student();
            foreach(Student stu in students)
            {
                if (stu.Id == id)
                {
                    s.Id = stu.Id;
                    s.Name = stu.Name;
                    s.Sex = stu.Sex;
                    s.Age = stu.Age;
                }
            }
            return View(s);
        }

        //
        // POST: /Student/Delete/5

        [HttpPost]
        public ActionResult Delete(Student s)
        {
            try
            {
                // TODO: Add delete logic here
                foreach (Student stu in students)
                {
                    if (stu.Id == s.Id)
                    {
                        students.Remove(stu);
                        break;
                    }
                }
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
    }
}

3：视图的代码：

列表页的代码：

    <table>
        <tr>
            <th></th>
            <th>
                Id
            </th>
            <th>
                Name
            </th>
            <th>
                Sex
            </th>
            <th>
                Age
            </th>
        </tr>

    <% foreach (var item in Model) { %>
   
        <tr>
            <td>
                <%: Html.ActionLink("Edit", "Edit", new { id=item.Id }) %> |
                <%: Html.ActionLink("Details", "Details", item)%> |    //这边要特别注意的
                <%: Html.ActionLink("Delete", "Delete", new { id=item.Id })%>
            </td>
            <td>
                <%: item.Id %>
            </td>
            <td>
                <%: item.Name %>
            </td>
            <td>
                <%: item.Sex %>
            </td>
            <td>
                <%: item.Age %>
            </td>
        </tr>
   
    <% } %>

    </table>

    <p>
        <%: Html.ActionLink("Create New", "Create") %>
    </p>

    <br />

增加的代码：

    <% using (Html.BeginForm()) {%>
        <%: Html.ValidationSummary(true) %>

        <fieldset>
            <legend>Fields</legend>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Id) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Id) %>
                <%: Html.ValidationMessageFor(model => model.Id) %>
            </div>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Name) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Name) %>
                <%: Html.ValidationMessageFor(model => model.Name) %>
            </div>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Sex) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Sex) %>
                <%: Html.ValidationMessageFor(model => model.Sex) %>
            </div>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Age) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Age) %>
                <%: Html.ValidationMessageFor(model => model.Age) %>
            </div>
           
            <p>
                <input type="submit" value="Create" />
            </p>
        </fieldset>

    <% } %>

    <div>
        <%: Html.ActionLink("Back to List", "Index") %>
    </div>

编辑的代码：

    <% using (Html.BeginForm()) {%>
        <%: Html.ValidationSummary(true) %>
       
        <fieldset>
            <legend>Fields</legend>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Name) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Name) %>
                <%: Html.ValidationMessageFor(model => model.Name) %>
            </div>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Sex) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Sex) %>
                <%: Html.ValidationMessageFor(model => model.Sex) %>
            </div>
           
            <div class="editor-label">
                <%: Html.LabelFor(model => model.Age) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.Age) %>
                <%: Html.ValidationMessageFor(model => model.Age) %>
            </div>
           
            <p>
                <input type="submit" value="Save" />
            </p>
        </fieldset>

    <% } %>

    <div>
        <%: Html.ActionLink("Back to List", "Index") %>
    </div>