Asp.net mvc 2 in action 笔记-1 概述、Model
受Rails成功的影响,很多的开发框架都加入了rails成功的MVC思想,如.net世界的Castle Subsonic等,微软发布的框架Asp.net MVC作为后来者,吸取了很多好的思想,而且作为微软的官方支持,代码开源,因此估计asp.net的Web开发世界这个会成为主流。
本系列是看的图书《Asp.net mvc 2 in action》的一个笔记整理
约定
■ Content—类似CSS 和图片的静态文件
■ Controllers—控制器类
■ Models—模型类
■ Scripts—JavaScript 文件
■ Views—视图
Model
第2,8章
presentation model 弱类型
使用ViewData TempData传递过来的数据模型,这个结构是个字典
ViewData:把数据传递给视图的容器
TempData is a collection that you can use to store data. It will be persisted in server Session memory for one round-trip.
例子1:简单的形式
如控制器HomeController.cs中传入
public ActionResult Index()
{
ViewData["Message"] = "Welcome to ASP.NET MVC!";
return View();
}
index.aspxs使用
<%= Html.Encode(ViewData["Message"])
例子2:数据提交
Index.aspx
<form method="post" action="/GuestBook/Sign">
<%= Html.Label("Name") %>
<%= Html.TextBox("Name") %>
<%= Html.Label("Email") %>
<%= Html.TextBox("Email") %>
<%= Html.Label("Comments") %>
<%= Html.TextArea("Comments", new { rows=6, cols=30 }) %>
<input type="submit" value="Sign" />
</form>
GuestBookController.cs参数的自动绑定,不区分大小写
public ActionResult Sign(string name, string email, string comments)
{
//do something with the values, such as send an email
ViewData["name"] = name;
ViewData["email"] = email;
return View("ThankYou");
}
presentation model 强类型
上例2的增强
首先定义模型
public class GuestBookEntry
{
public string Name { get; set; }
public string Email { get; set; }
public string Comments { get; set; }
}
Index.aspx 从ViePage<T> 继承[IDE中Add View向导添加]
Inherits="System.Web.Mvc.ViewPage<GuestBookWithModel.Models.GuestBookEntry>" %>
<% using (Html.BeginForm()) {%>
<fieldset>
<legend>Fields</legend>
<p>
<%= Html.LabelFor(model => model.Name) %>
<%= Html.TextBoxFor(model => model.Name) %>
</p>
<p>
<%= Html.LabelFor(model => model.Email) %>
<%= Html.TextBoxFor(model => model.Email) %>
</p>
<p>
<%= Html.LabelFor(model => model.Comments) %>
<%= Html.TextAreaFor(model => model.Comments) %>
</p>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
<% } %>
控制器 GuestBookController.cs
public ActionResult Index()
{
var model = new GuestBookEntry();
return View(model);
}
[HttpPost]
public ActionResult Index(GuestBookEntry entry)
{
//hang on to the submitted value, so we can
//retrieve it upon redirect
TempData["entry"] = entry;
return RedirectToAction("ThankYou");
}
public ActionResult ThankYou()
{
if(TempData["entry"] == null)
{
//somehow they got here without filling out the form
return RedirectToAction("index");
}
var model = (GuestBookEntry) TempData["entry"];
return View(model);
}
以上可见,强模型增加了可维护性,而且对于视图的自动化处理提供了支持[因为模型的元数据信息存在]
domain models
第23章提供了Nhibernate构建领域模型的详细实例
当然现在有Ado.net Entity,估计这个使用起来更方便,可以可视化的进行建模