ASP.NET MVC 使用Remote特性实现远程属性验证

2017-09-13 08:14:48来源:cnblogs.com作者:Jichan·Jong人点击

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RemoteAttribute是asp.net mvc 的一个验证特性,它位于System.Web.Mvc命名空间

下面通过例子来说明

很多系统中都有会员这个功能,会员在前台注册时,用户名不能与现有的用户名重复,还要求输入手机号码去注册,同时手机号码也需要验证是否重复,下面是实体类

/// <summary>/// 会员/// </summary>public class Member{    public int Id { get; set; }    [Required(ErrorMessage = "请填写用户名")]    [Remote("CheckName","Member",HttpMethod = "POST")]    public string Name { get; set; }    [Required(ErrorMessage = "请填写密码")]    [StringLength(16, ErrorMessage = "请填写6到16位的密码",MinimumLength = 6)]    public string Password { get; set; }    [Required(ErrorMessage = "请填写手机号码")]    [RegularExpression(@"^1/d{10}$",ErrorMessage = "手机号码格式错误")]    [Remote("CheckMobile", "Member", HttpMethod = "POST")]    public string Mobile { get; set; }}
View Code

Controller类

public class MemberController : Controller    {        // GET: Member        public ActionResult Index()        {            return View();        }        public ActionResult Create()        {            return View();        }        [HttpPost]        public ActionResult Create(Member model)        {            if (ModelState.IsValid)            {            }            return View(model);        }        [HttpPost]        public JsonResult CheckName(string Name)        {            //这里假设已经有了test这个会员,如果注册时填写的也是test这个会员,则已存在会员,验证不通过            //这里只是模拟,实际的情况是读取数据库等去判断是否存在该用户名的会员            if (!string.IsNullOrWhiteSpace(Name) &&  Name.Trim() == "test")            {                return Json("用户名" + Name + "已存在", JsonRequestBehavior.AllowGet);            }            return Json(true, JsonRequestBehavior.AllowGet);        }        [HttpPost]        public JsonResult CheckMobile(string Mobile)        {            //这里假设已经有了手机号码10000000000已经注册,如果使用该号码注册,则验证不通过            //注意:这里的号码10000000000不具有真实性,只是举例使用            //这里只是模拟,实际的情况是读取数据库等去判断是否存在该手机号码的会员            if (!string.IsNullOrWhiteSpace(Mobile) && Mobile.Trim() == "10000000000")            {                return Json("手机号码已被注册", JsonRequestBehavior.AllowGet);            }            return Json(true, JsonRequestBehavior.AllowGet);        }    }
View Code

视图

@model RemoteDemoWeb.Models.Member@{    ViewBag.Title = "Create";    Html.EnableClientValidation();    Html.EnableUnobtrusiveJavaScript();}<h2>Create</h2>@using (Html.BeginForm()) {    @Html.AntiForgeryToken()        <div class="form-horizontal">        <h4>Member</h4>        <hr />        @Html.ValidationSummary(true, "", new { @class = "text-danger" })        <div class="form-group">            @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })            <div class="col-md-10">                @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })                @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })            </div>        </div>        <div class="form-group">            @Html.LabelFor(model => model.Password, htmlAttributes: new { @class = "control-label col-md-2" })            <div class="col-md-10">                @Html.EditorFor(model => model.Password, new { htmlAttributes = new { @class = "form-control" } })                @Html.ValidationMessageFor(model => model.Password, "", new { @class = "text-danger" })            </div>        </div>        <div class="form-group">            @Html.LabelFor(model => model.Mobile, htmlAttributes: new { @class = "control-label col-md-2" })            <div class="col-md-10">                @Html.EditorFor(model => model.Mobile, new { htmlAttributes = new { @class = "form-control" } })                @Html.ValidationMessageFor(model => model.Mobile, "", new { @class = "text-danger" })            </div>        </div>        <div class="form-group">            <div class="col-md-offset-2 col-md-10">                <input type="submit" value="Create" class="btn btn-default" />            </div>        </div>    </div>}<div>    @Html.ActionLink("Back to List", "Index")</div>@section scripts{    <script src="~/Scripts/jquery.validate.js"></script><script src="~/Scripts/jquery.validate.unobtrusive.js"></script>    }
View Code

这里调用了Html.EnableClientValidation(); 和Html.EnableUnobtrusiveJavaScript();   同时引入jquery.validate.js 和jquery.validate.unobtrusive.js

前台浏览,并填写信息

当填写存在的用户名和手机号码时

上面例子是基于ASP.NET MVC 5

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