Net 4.0的UrlRouting实现友好的URL

public static void RegisterRoutes(RouteCollection routes)
{
    routes.Ignore("{resource}.axd/{*pathInfo}");

    routes.MapPageRoute("blogs", //给这个UrlRouting规则起一个名字
        "archive/{year}/{month}/{date}/default.aspx", //希望的友好Url地址格式
        "~/blogs.aspx", //映射到的aspx页面路径
        false, //是否需要检查用户权限
        new RouteValueDictionary{ { "year", DateTime.Now.Year },
            { "month", DateTime.Now.Month },
            {"date", DateTime.Now.Date}
        },//参数的默认值
        new RouteValueDictionary {
            {"year",@"(1920)\d{2}"},
            {"month",@"\d{1,2}"},
            {"date",@"\d{1,2}"}
        } //参数的规则，我们在这里限制url中的年月日是我们想要的数据格式
        );

}

void Application_Start(object sender, EventArgs e)
{
    //在Application_Start时注册的Routing规则
    RegisterRoutes(RouteTable.Routes);
}

protected void Page_Load(object sender, EventArgs e)
{
    string year = (string)RouteData.Values["year"];
    string month = (string)RouteData.Values["month"];
    string date = (string)RouteData.Values["date"];
}

<asp:Literal ID="literalYear" runat="server" Text="<%$RouteValue:year %>"></asp:Literal>
    -<asp:Literal ID="literal1" runat="server" Text="<%$RouteValue:month %>"></asp:Literal>
    -<asp:Literal ID="literal2" runat="server" Text="<%$RouteValue:date %>"></asp:Literal>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:TestDb %>"
    SelectCommand="SELECT BlogID,BlogTitle FROM Blogs Where Category = @category">
    <SelectParameters>
        <asp:RouteParameter Name="category" RouteKey="category" />
    </SelectParameters>
</asp:SqlDataSource>

<a href='<%=GetRouteUrl("blogs",new {year=2010,month=05,date=05}) %>'>2010年5月1日的博客</a>