AutoMapper使用示例(一)【结合ASP.NET MVC4 】
Model层的类:
public class Member
{
public int MemberId { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public int Age { get; set; }
public string State { get; set; }
}
public class MembersViewModel
{
public int MemberId { get; set; }
public string Name { get; set; }
}
public class ProfileViewModel
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string ProfilePictureUrl { get; set; }
}
public class WelcomeViewModel
{
public string FirstName { get; set; }
public string LastName { get; set; }
}
public class MemberRepository
{
List<Member> _members;
public MemberRepository()
{
_members = new List<Member>();
_members.Add(new Member
{
MemberId = 1,
FirstName = "天风",
LastName = "幻灵",
Age = 28,
State = "死灵国"
});
_members.Add(new Member
{
MemberId = 2,
FirstName = "白龙",
LastName = "幻灵",
Age = 15,
State = "龙之国"
});
_members.Add(new Member
{
MemberId = 3,
FirstName = "释天",
LastName = "幻灵",
Age = 29,
State = "天国"
});
}
public Member GetMember(int id)
{
return _members.FirstOrDefault(m => m.MemberId == id);
}
public List<Member> GetMembers()
{
return _members;
}
}
HomeController.cs代码如下:
public class HomeController : Controller
{
MemberRepository _memberRepository = new MemberRepository();
public ActionResult Index()
{
return View();
}
public ActionResult Welcome()
{
var member = _memberRepository.GetMember(1);
var viewModel = Mapper.Map<Member, WelcomeViewModel>(member);
return View(viewModel);
}
public ActionResult Profile(int id)
{
var member = _memberRepository.GetMember(id);
var viewModel = Mapper.Map<Member, ProfileViewModel>(member);
viewModel.ProfilePictureUrl = GetProfileImageUrl(member.MemberId);
return View(viewModel);
}
public ActionResult Members()
{
var members = _memberRepository.GetMembers();
var viewModel = Mapper.Map<List<Member>, List<MembersViewModel>>(members);
return View(viewModel);
}
private string GetProfileImageUrl(int id)
{
return string.Format("~/Images/Members/{0}/Profile", id);
}
}
Index.cshtml
@{
ViewBag.Title = "Index";
}
<h2>
Index</h2>
<p>这是一个简单的AutoMapper例子网站，展示了如何在不同的情况下使用。</p>
<p>检查映射在Global.asax中是如何创建的，并期待在HomeController中的映射是如何使用的。</p>
Members.cshtml
@model List<ViewModels.MembersViewModel>
@{
ViewBag.Title = "Members";
}
<h2>@ViewBag.Title</h2>
<p>
下面是我们的会员的完整列表</p>
<ul>
@foreach (var member in Model)
{
<li>@Html.ActionLink(member.Name, "Profile", new { id = member.MemberId })</li>
}
</ul>
Profile.cshtml
@model ViewModels.ProfileViewModel
@{
ViewBag.Title = string.Format("{0}的简介", Model.FirstName);
}
<h2>@ViewBag.Title</h2>
<p>
这是<span style="color:red;"> @Model.FirstName @Model.LastName </span>的个人资料页!</p>
<p>
他的个人资料图像位于 @Model.ProfilePictureUrl.</p>
Welcome.cshtml
@model ViewModels.WelcomeViewModel
@{
ViewBag.Title = "Welcome";
}
<h2>@ViewBag.Title</h2>
<p>欢迎来到示例 @Model.FirstName @Model.LastName!</p>
_Layout.cshtml
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>@ViewBag.Title</title>
<link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
<script src="@Url.Content("~/Scripts/jquery-1.7.2.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/modernizr-2.5.3.js")" type="text/javascript"></script>
</head>
<body>
<header>
<h1>AutoMapper 示例</h1>
</header>
<nav>
<ul>
<li>@Html.ActionLink("欢迎页面", "Welcome")</li>
<li>@Html.ActionLink("简介页面", "Profile", new { id = 2 })</li>
<li>@Html.ActionLink("成员列表页面", "Members")</li>
</ul>
</nav>
@RenderBody()
<footer>
</footer>
</body>
</html>
Global.asax
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using Bootstrap;
using Bootstrap.AutoMapper;
using AutoMapper;
using AutoMapperExample.Dal;
using ViewModels;
namespace AutoMapperExample
{
public class MvcApplication : HttpApplication
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new HandleErrorAttribute());
}
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
"Default",
"{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
public static void CreateMaps()
{
Mapper.CreateMap<Member, WelcomeViewModel>();
Mapper.CreateMap<Member, ProfileViewModel>()
.ForMember(dest => dest.ProfilePictureUrl, src => src.Ignore()); //在目标类型我们有个属性ProfilePictureUrl，它有其他的含义(非字面意思或预留字段)， 我们不想进行转换
//Name属性在Source中不存在，如果现在创建映射规则，在映射的时候必然会抛出异常。这个时候我们就需要使用自定义解析器来完成映射。
Mapper.CreateMap<Member, MembersViewModel>().ForMember(dest => dest.Name, src => src.ResolveUsing(m => string.Format("{0} {1}", m.FirstName, m.LastName)));
//在程序启动时对所有的配置进行严格的验证
Mapper.AssertConfigurationIsValid();
}
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RegisterGlobalFilters(GlobalFilters.Filters);
RegisterRoutes(RouteTable.Routes);
CreateMaps();
}
}
}
结果如图:
