by Tom
7. December 2009 20:26
You can download the full source here using (msys)git:
http://github.com/ToJans/MVCExtensions
// The quest for perfect asp.net MVC code - v0.3
//
// For a while I have been looking for the perfect ASP.Net MVC code.
// This is the cleanest code I have been able to write.
// I would like to challenge everyone to do better !!!
//
// By this I mean creating a better controller/views if possible codewise.
// The focus is not on the layout stuff, but having it might be a plus.
//
// The scope : a very rudimentary Task list (KISS)
//
// You can download the full source here using (msys)git:
// http://github.com/ToJans/MVCExtensions
//
// You will see it is very easy to alter, just fetch it with git and press F5
//
// Please do let me know what you think about my approach as well,
// and whether you could do better: ToJans@twitter
// Send this link to as much fellow coders as possible, so we can see lots of alternatives
//
// PS: you can also leave a comment @ my website (look at my twitter account for the url)
//
// Edit: this is my third version, and I am still looking for improvements
//
// Some noteworthy facts :
// - In the MVCapp, there only DLL directly referenced is the ViewModel DLL,
// so the views do NOT reference the controllers anywhere
// - The controller contains only logic & domain model objects => VERY CLEAN Controller
// - The resulting controller action model is mapped to the ViewModel using
// IMapper.Map<source,ViewModel>(s,vm)
// - The viewmodel should include everything that should be visible on the screen, so not only
// data but also the actionlinks one can use
// - The actionlinks for the viewpages are defined in the IMapper, and automaticly passed on to
// the view => you can see/alter the program flow in the mapping definitions
// - Stubbing the controller should be a piece of cake using this code, so you could use this
// design to easily develop application mockups that are ready to be implemented once the client
// approves, so first build your viewmodels and views, show it to the client, and upon agreement
// start development on the controller.... In fact I am going to test this method on my next project
//
// Kind regards,
// Tom Janssens
//
// --------------------------------------------------------------------------------
// Controller :
// --------------------------------------------------------------------------------
namespace Tasks.Core.Controllers
{
public class HomeController : Controller
{
// for the sake of the demo we do not use DI but static instances
static IRepository<Task> rTask = rTask ?? new FakeRepository<Task>(null);
static IMapper sMapper = sMapper ?? new Mapper();
public ActionResult Index()
{
return View(sMapper.Map<Task[], VMIndex>(rTask.Find.ToArray()));
}
public ActionResult AddNewTask(Task task)
{
rTask.SaveOrUpdate(task);
return this.RedirectToAction(c => c.Index());
}
public ActionResult Done(int id)
{
var t = rTask.GetById(id);
t.Done = !t.Done;
rTask.SaveOrUpdate(t);
return this.RedirectToAction(c=>c.Index());
}
public ActionResult Edit(int id)
{
return View(sMapper.Map<Task,VMEdit>(rTask.GetById(id)));
}
public ActionResult PostEdit(int id)
{
var task = rTask.GetById(id);
UpdateModel(task);
rTask.SaveOrUpdate(task);
return this.RedirectToAction(c => c.Index());
}
public ActionResult Delete(int id)
{
rTask.Delete(rTask.GetById(id));
return this.RedirectToAction(c => c.Index());
}
}
}
// --------------------------------------------------------------------------------
// Mapping registry :
// --------------------------------------------------------------------------------
am.Mapper.CreateMap<Task, VMIndex.Task>()
.ForMember(v => v.Name, m => m.MapFrom(t => t.Name))
.ForMember(v => v.Description, m => m.MapFrom(t => t.Description))
.ForMember(v => v.AL_Status, m => m.MapFrom(
t => cHome.AL(t.Done ? "Done" : "Todo", a => a.Done(t.Id))))
.ForMember(v => v.AL_Edit, m => m.MapFrom(
t => cHome.AL("Edit", a => a.Edit(t.Id))))
.ForMember(v => v.AL_Delete, m => m.MapFrom(
t => cHome.AL("Delete", a => a.Delete(t.Id))));
am.Mapper.CreateMap<Task[], VMIndex>()
.ForMember(v => v.AllTasks, m => m.MapFrom(t => t))
.ForMember(v => v.HasNoTasks, m => m.MapFrom(t=>t.Length==0))
.ForMember(v => v.AL_AddTask, m => m.MapFrom(
t => cHome.AL("Add new task", c => c.AddNewTask(null))));
am.Mapper.CreateMap<Task, VMEdit>()
.ForMember(v => v.Name, m => m.MapFrom(t => t.Name))
.ForMember(v => v.Description, m => m.MapFrom(t => t.Description))
.ForMember(v => v.AL_CancelEdit, m => m.MapFrom(
t => cHome.AL("Cancel changes", c => c.Index())))
.ForMember(v => v.AL_PostEdit, m => m.MapFrom(
t => cHome.AL("Save changes", c => c.PostEdit(t.Id))));
// --------------------------------------------------------------------------------
// VMIndex.cs - the viewmodel for the index page
// --------------------------------------------------------------------------------
public class VMIndex
{
public class Task
{
public string Name;
public string Description;
public VMActionLink AL_Status;
public VMActionLink AL_Edit;
public VMActionLink AL_Delete;
}
public IEnumerable<Task> AllTasks;
public VMActionLink AL_AddTask;
public bool HasNoTasks;
}
// --------------------------------------------------------------------------------
// Index.spark :
// --------------------------------------------------------------------------------
<viewdata model="Tasks.ViewModel.Home.VMIndex" />
<content name="Title">
Index
</content>
<content name="Main">
<h1>Task list</h1>
<if condition="Model.HasNoTasks">
No tasks yet.
</if>
<else>
<table>
<tr>
<td>Name</td>
<td>Name</td>
<td>Status</td>
<td>Edit</td>
<td>Delete</td>
</tr>
<tr each="var t in Model.AllTasks">
<td>${t.Name}</td>
<td>${t.Description}</td>
<td><alink a="t.AL_Status" /></td>
<td><alink a="t.AL_Edit" /> </td>
<td><alink a="t.AL_Delete" /> </td>
</tr>
</table>
</else>
<hr />
<h3>Add a new task</h3>
<aform a="Model.AL_AddTask">
<label for="Name">Name :</label><br />
<input type="text" name="Name" /><br />
<label for="Description">Description:</label><br />
<textarea cols="20" rows="2" name="Description" ></textarea><br />
</aform>
</content>
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