mvc项目01_体味mvc的风景_jQuery validate验证_mvc+ajax

mvc项目01_感受mvc的风景_jQuery validate验证_mvc+ajax

--感受mvc

 1、数据库表+初始数据

      

2、ADO.NET EF +MVC2

      显示数据列表

UserController.cs

     
        ZJFEntities db = new ZJFEntities();
      
        public ActionResult Index() //新建试图-->选择强类型-->选择List
        {
            //取出 UserInfo 表里 的所有数据传递到前台 的IEnumbale接口集合
            //传递强类型数据
            ViewData.Model = db.UserInfo.AsEnumerable<UserInfo>();
            return View();//亦可 return View(db.UserInfo.AsEnumerable<UserInfo>());
   
        }
        public ActionResult Create()
        {
            return View();
        }

        //
        // POST: /User/Create
        [HttpPost]   //获取post表单提交过来的数据
        public ActionResult Create(UserInfo userinfo) //FormCollection
        {
            try
            {
                UserInfo adduser = new UserInfo();

                adduser.UserName = userinfo.UserName;

                adduser.Age=userinfo.Age;

                db.UserInfo.AddObject(adduser);
                db.SaveChanges();//同步到数据库中
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

     
        //UserName--和View中传递的参数名称要一致【约定优于配置】
        public  ActionResult CheckUserName(string UserName) //也可以返回JsonResult-->ajax验证用户名是否存在 返回 json格式的数据
        {
            bool flag = false;
            var checkusername=(from u in db.UserInfo
                                  where u.UserName == UserName
                                  select u.UserName).Count(); //查看该UserName的个数【检测数据库表是否有该用户】
            if (checkusername<= 0)
            {
                flag = true;
            }
            return Json(flag, JsonRequestBehavior.AllowGet); //返回json数据
        }

    }

3、view 前端校验

  <script src="../../Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
    <script src="../../Scripts/jquery.validate.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function () {
            $("#form1").validate({
                rules: {
                    UserName: {
                        required: true,
                        minlength: 5,
                        remote: "/User/CheckUserName"
                    },
                    Age: {
                        required: true,
                        maxlength: 3
                    }
                },
                messages: {
                    UserName: {
                        required: "兔说：请输入用户名！",
                        minlength: "兔说：长度不能小于5位！",
                        remote: "兔说：此用户名已经存在"
                    },
                    Age:{
                        required: "兔说：年纪不能为空",
                        maxlength: "兔说：个数必须小于3"
                    }
                }
            });
        });
    </script>

    <% Html.EnableClientValidation(); %>
    <% using (Html.BeginForm("create", "user", FormMethod.Post, new { id = "form1" }))
       {%>
    <%: Html.ValidationSummary(true)%>
    <fieldset>
        <legend>Fields</legend>
        <div class="editor-label">
            <%: Html.LabelFor(model => model.UserName)%>
        </div>
        <div class="editor-field">
            <%: Html.TextBoxFor(model => model.UserName)%>
       <%: Html.ValidationMessageFor(model => model.UserName)%>
        </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>

4、后台校验

     //让目标类和当前类共享元数据信息
    [MetadataType(typeof(UserValidate))]
    public partial class UserInfo
    {

    }

    public class UserValidate
    {
        //目标类里的所有属性都可以在下面进行校验规则定义
        [Required(ErrorMessage = "*")]
   
        public int id { get; set; }

        [Required(ErrorMessage = "* 名字不能为空")]
        public string UserName { get; set; }
    }

         [Range(10,130)]
        [Required(ErrorMessage="*必填项")]
        public int Id { get; set; }
  
        [StringLength(10,ErrorMessage="*<10")]
        public string Content { get; set; }
        [RegularExpression(@"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$")]
      ]
        public string B{ get; set; }

5、结果

--  01:初始数据     

    

---------------------------02 mvc 使用ajax 用户名是否存在----------------------------

-----------------------03数据验证-------------------------

---------------------------04 mvc 输入有效数据-------------------------

----------------------------05显示列表------------------------------------------