ASP.net MVC 自定义路由处理程序约束

ASP.net MVC 自定义路由处理程序/约束

csharp
public class MyRouteHandler : IHttpHandler
{
    public bool IsReusable => false;
    public void ProcessRequest(HttpContext context)
    {
        // 根据自定义的逻辑处理请求
        // ...
        // 转发请求给控制器和操作方法
        var controllerName = "Home";
        var actionName = "Index";
        var routeData = new RouteData();
        routeData.Values["controller"] = controllerName;
        routeData.Values["action"] = actionName;
        // 创建控制器工厂
        var controllerFactory = ControllerBuilder.Current.GetControllerFactory();
        var controller = controllerFactory.CreateController(new RequestContext(new HttpContextWrapper(context), routeData), controllerName);
        // 执行操作方法
        controller.Execute(new RequestContext(new HttpContextWrapper(context), routeData));
    }
}

csharp
public class MyRouteConstraint : IRouteConstraint
{
    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        // 根据自定义的逻辑判断是否满足约束条件
        // ...
        // 返回是否满足约束条件的结果
        return true;
    }
}

csharp
public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
    // 创建自定义的路由处理程序
    var routeHandler = new MyRouteHandler();
    // 创建自定义的路由约束
    var routeConstraint = new MyRouteConstraint();
    // 添加自定义路由
    routes.Add(new Route("custom/{id}", routeHandler)
    {
        Constraints = new RouteValueDictionary(new { id = routeConstraint })
    });
    // 默认路由配置
    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
    );
}