MVC 4. ModelState.IsValid始终返回true

Question

我不明白为什么ModelState.isValid会以各种方式给我.我在电子邮件中设置了一些返回true并且我在空字段中输入,它也返回true.我的问题是,当该字段为空时,如果我写了这封电子邮件,我该怎么办？

我有下一个视图文件:

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <div style="padding-top:5px;clear:both;"></div>
    <% using (Html.BeginForm()) { %>
        <%: Html.ValidationSummary(true) %>   
        <fieldset>
                <legend>Email usuario</legend>

                <div class="editor-field">
                    <%: Html.TextBoxFor(m => m.Email) %>
                    <%: Html.ValidationMessageFor(m => m.Email) %>
                </div>

                <input type="submit" value="Enviar Email" />
        </fieldset>
    <% } %>
    <div style="padding-top:5px;clear:both;"></div>
</asp:Content>

控制器是:

//
// GET: /Account/EmailRequest
public ActionResult EmailRequest()
{
    return View();
}

[HttpPost]
public ActionResult EmailRequest(string email)
{
    if (ModelState.IsValid)
    {
        // save to db, for instance
        return RedirectToAction("AnotherAction");
    }
    return View();
}

我的模型类是:

    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;
    using System.Globalization;
    using System.Web.Mvc;
    using System.Web.Security;

namespace PortalClient.Models
{
    public class EmailRequest
    {

        [Required(ErrorMessage = "required")]
        public string Email { get; set; }
    }
}

Answer 1

将帖子操作的签名更改string email为EmailRequest model,然后检查状态.例如

[HttpPost]
public ActionResult EmailRequest(EmailRequest model)
{
    if (ModelState.IsValid)
    {
        // save to db, for instance
        return RedirectToAction("AnotherAction");
    }
    return View();
}