快速入门系列--MVC--02路由

    现在补上URL路由的学习，至于蒋老师自建的MVC小引擎和相关案例就放在论文提交后再实践咯。通过ASP.NET的路由系统，可以完成请求URL与物理文件的分离，其优点是：灵活性、可读性、SEO优化。接下来通过一个最简单的路由例子进入这部分的学习，这是一个蒋老师提供的WebForm路由的例子，回想起刚做ASP.NET时，每次看到.aspx页面的前台代码时的茫然和无措，茫茫多的标签，属性，数据源的绑定吓死小兄弟俺了，也花过不少时间去理解记忆，效果不也不大。现在回头看看感觉好了很多，看到IsPostback老亲切了，觉得在理解的基础上拖拉控件也是很幸福的事情，嘿嘿。

 1 void Application_Start(object sender, EventArgs e)
 2 {
 3 //路由配置
 4 var defaults = new RouteValueDictionary { { "name", "*" }, { "id", "*" } };
 5 RouteTable.Routes.MapPageRoute("default", "employees/{name}/{id}", "~/Default.aspx", true, defaults);
 6 }
 7 
 8 //前台代码
 9 <form id="form1" runat="server">
10 <div>
11 <asp:GridView ID="GridViewEmployees" runat="server" AutoGenerateColumns="False" Width="100%">
12 <Columns>
13 <asp:HyperLinkField DataNavigateUrlFields="Name,Id" DataNavigateUrlFormatString="~/employees/{0}/{1}" DataTextField="Name" HeaderText="姓名" />
14 <asp:BoundField DataField="Gender" HeaderText="性别" />
15 <asp:BoundField DataField="Birthday" DataFormatString="{0:dd/MM/yyyy}" HeaderText="出生日期" />
16 <asp:BoundField DataField="Department" HeaderText="部门" />
17 </Columns>
18 </asp:GridView>
19 <asp:DetailsView ID="DetailsViewEmployee" runat="server" Height="50px" Width="100%" AutoGenerateRows="False">
20 <Fields>
21 <asp:BoundField DataField="Id" HeaderText="ID" />
22 <asp:BoundField DataField="Name" HeaderText="姓名" />
23 <asp:BoundField DataField="Gender" HeaderText="性别" />
24 <asp:BoundField DataField="Birthday" DataFormatString="{0:dd/MM/yyyy}" HeaderText="出生日期" />
25 <asp:BoundField DataField="Department" HeaderText="部门" />
26 </Fields>
27 </asp:DetailsView>
28 </div>
29 </form>
30 
31 //后台代码
32 public partial class Default : System.Web.UI.Page
33 {
34 private EmployeeRepository _repository;
35 public EmployeeRepository Repository
36 {
37 get
38 {
39 return null == _repository ? _repository = new EmployeeRepository() : _repository;
40 }
41 }
42 
43 protected void Page_Load(object sender, EventArgs e)
44 {
45 if (this.IsPostBack)
46 {
47 return;
48 }
49 string employeeId = this.RouteData.Values["id"] as string;
50 if (employeeId == "*" || string.IsNullOrEmpty(employeeId))
51 {
52 this.GridViewEmployees.DataSource = this.Repository.GetEmployees();
53 this.GridViewEmployees.DataBind();
54 this.DetailsViewEmployee.Visible = false;
55 }
56 else
57 {
58 this.DetailsViewEmployee.DataSource = this.Repository.GetEmployees(employeeId);
59 this.DetailsViewEmployee.DataBind();
60 this.GridViewEmployees.Visible = false;
61 }
62 }
63 }

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