ASP.NET WebForms 4.0支持单向路由功能（MVC）

The ASP.NET Routing engine was added in .NET Framework 3.5 SP1. Now

Microsoft have added better support for using the engine in ASP.NET

WebForms 4.0 by using expression builders enabling bi-directional

routing.

Below is a summary of the code showed in the video. They use the

typical example of how Product.aspx?category=jerseys can map to

Product/Jerseys. Using the ASP.NET Routing engine this mapping can be

added using the RouteTable in Application_Start:

RouteTable.Routes.Add("Product",

new Route("Product/{name}",

new PageRouteHandler("~/Product.aspx")));

<system.web>

<compilation>

<expressionBuilders ...>

<add expressionPrefix="RouteUrl"

type="System.Web.Compilation.RouteUrlExpressionBuilder" />

<add expressionPrefix="RouteValue"

type="System.Web.Compilation.RouteValueExpressionBuilder" />

</expressionBuilders>

</compilation>

</system.web>

The first expression is for getting a URL and the second for getting

a value. The $ sign is used to access expressions from an aspx page:

To get the value from the name attribute, users use the Route object instead of the Request object:

or using an expression builder:

By using ASP.NET Routing and the new bi-directional support users

can decouple URLs from a physical Web Form, allowing friendlier URLs

and have search engines discover and use these.

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作者：灵动生活 郝宪玮

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