MVC中，关于往后台提交的方法有：

1、Html.BeginForm()：同步

2、Ajax.BeginForm()：异步

3、js或jQuery提交后台

本文体验Ajax.BeginForm()方法。

  View model

using System;

using System.ComponentModel.DataAnnotations;

namespace XHelent.Models

{

public class Registration : IValidatableObject

{

public string RegisrationUniqueId { get; set; }

[Required]

[Display(Name = "姓名")]

public string Name { get; set; }

[Required]

[Display(Name = "年龄")]

public int Age { get; set; }

public System.Collections.Generic.IEnumerable
     
       Validate(ValidationContext validationContext)
     

{

if (Age < 18)

{

yield return new ValidationResult("年龄至少18岁以上", new String[]{
   "Age"});

}

}

}

}

让model实现了IValidatableObject，在model层自定义验证逻辑和错误信息。

 

  HomeController

using System.Security.Cryptography;

using System.Web;

using System.Web.Mvc;

using XHelent.Models;

namespace XHelent.Controllers

{

public class HomeController : Controller

{

public ActionResult Index()

{

return View(new Registration());

}

[HttpPost]

public PartialViewResult Index(Registration model)

{

if (ModelState.IsValid)

{

RNGCryptoServiceProvider csp = new RNGCryptoServiceProvider();

byte[] registrationBytes = new byte[16];

csp.GetBytes(registrationBytes);

model.RegisrationUniqueId = Convert.ToBase64String(registrationBytes);

return PartialView("Success", model);

}

else

{

return PartialView("FormContent", model);

}

}

}

}

无论验证成功或失败，都返回强类型部分视图。

 

  Home/Index.cshtml视图

@model XHelent.Models.Registration

@{

ViewBag.Title = "Index";

Layout = "~/Views/Shared/_Layout.cshtml";

}

当前时间：@DateTime.Now.ToShortDateString()

@{Html.RenderPartial("FormContent");}

  Home/FormContent.cshtml部分视图

@model XHelent.Models.Registration

@{

AjaxOptions options = new AjaxOptions

{

HttpMethod = "Post",

UpdateTargetId = "formContent" //可忽略

};

}

.field-validation-error {

color: red;

}

@using (Ajax.BeginForm(options))

{

登记

@Html.LabelFor(model => model.Name)

@Html.EditorFor(model => model.Name)

@Html.ValidationMessageFor(model => model.Name)

@Html.LabelFor(model => model.Age)

@Html.EditorFor(model => model.Age)

@Html.ValidationMessageFor(model => model.Age)

}

  Home/Success.cshmtl视图

@model XHelent.Models.Registration

恭喜，注册成功了！

注册号为：@Model.RegisrationUniqueId

没有填写效果：

 

年龄小于18效果：

 

输入正确效果：

==总结

使用Ajax.BeginForm()虽然可以实现异步提交并验证，但，如果放到后台管理系统的背景下，返回部分视图可能不是很方便。