前言

MVC自己的验证机制，通过一个案例记录学习的成果。

首先，model代码如下：

public class Students
    {
        [Display(Name = "ID")]
        public int Id { set; get; }

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

[Display(Name = "用户手机号")]
        [Required(ErrorMessage = "用户手机号不能为空")]
        [RegularExpression(@"^1[3458][0-9]{9}$", ErrorMessage = "手机号格式不正确")]//自定义验证规则
        public string Phone { get; set; }

[Display(Name = "用户邮箱")]
        [Required(ErrorMessage = "用户邮箱不能为空")]
        [RegularExpression(@"^[_/.a-z0-9]+@[a-z0-9]+[/.][a-z0-9]{2,}$", ErrorMessage = "邮箱格式不正确")]//自定义验证规则
        public string Emile { get; set; }
    }

其次，view代码如下：（用强制类型视图，自动生成的）

<script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
 <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@using (Html.BeginForm()) {
        @Html.ValidationSummary(true)
        <fieldset>
            <legend>Students</legend>
   
            <div class="editor-label">
                @Html.LabelFor(model => model.Name)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Name)
                @Html.ValidationMessageFor(model => model.Name)
            </div>
   
            <div class="editor-label">
                @Html.LabelFor(model => model.Phone)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Phone)
                @Html.ValidationMessageFor(model => model.Phone)
            </div>
   
            <div class="editor-label">
                @Html.LabelFor(model => model.Emile)
            </div>
            <div class="editor-field">
                @Html.EditorFor(model => model.Emile)
                @Html.ValidationMessageFor(model => model.Emile)
            </div>
   
            <p>
                @* @Html.ValidationSummary()*@ @*这里的注释是：ValidationSummary是显示所有字段的错误信息；
                                                                                           ValidationMessageFor是针对指定字段的错误信息；
                                                                                           一般都是使用它们其中的一个。*@
                <input type="submit" value="Create" />
            </p>
        </fieldset>
    }

最后，controller代码如下：

[HttpGet]
        public ActionResult List()
        {
            return View();
        }

[HttpPost]
        public ActionResult List(Students model)
        {
            //这里的注释是：如果model里面没有进行验证，可以在这里添加验证。不过一般都是在model里面做验证，方便简单。这里的验证可以作为特殊使用
            //if(model.Name==null)
            //{
            //    ModelState.AddModelError("Name", "用户名不能为空");
            //}
            //if(model.Phone==null)
            //{
            //    ModelState.AddModelError("Phone", "用户手机号不能为空");
            //}
            //if(model.Emile==null)
            //{
            //    ModelState.AddModelError("Emile", "用户邮箱不能为空");
            //}
            if(ModelState.IsValid)
            {
                //验证通过做什么
            }
            return View(model);
        }

运行结果：

结束

上面案例记录了MVC验证的实现过程，如果想了解更多MVC自带的默认验证规则，请查阅MSDN：http://msdn.microsoft.com/zh-cn/library/cc490428(v=vs.95).aspx