asp.net-mvc – ASP.Net MVC中的分页和路由

发布时间：2020-12-15 23:48:12 所属栏目：asp.Net 来源：网络整理

导读：我跟随 Martijn Boland’s ‘Paging with ASP.NET MVC’.虽然有帮助但它提出了一些我不明白的问题. Martijn说： Internally,the pager uses RouteTable.Routes.GetVirtualPath() to render the url’s so the page url’s can be configured via routing to

我跟随 Martijn Boland’s ‘Paging with ASP.NET MVC’.虽然有帮助但它提出了一些我不明白的问题.

Martijn说：

Internally,the pager uses
RouteTable.Routes.GetVirtualPath() to
render the url’s so the page url’s can
be configured via routing to create
nice looking url’s like for example
‘/Categories/Shoes/Page/1′ instead of
‘/Paging/ViewByCategory?name=Shoes&page=1′.

这就是他所说的：

private string GeneratePageLink(string linkText,int pageNumber)
  {
   var pageLinkValueDictionary = new RouteValueDictionary(this.linkWithoutPageValuesDictionary);
   pageLinkValueDictionary.Add("page",pageNumber);
   //var virtualPathData = this.viewContext.RouteData.Route.GetVirtualPath(this.viewContext,pageLinkValueDictionary);
   var virtualPathData = RouteTable.Routes.GetVirtualPath(this.viewContext.RequestContext,pageLinkValueDictionary);

   if (virtualPathData != null)
   {
    string linkFormat = "<a href="{0}">{1}</a>";
    return String.Format(linkFormat,virtualPathData.VirtualPath,linkText);
   }
   else
   {
    return null;
   }
  }

这个怎么用？当我使用它时,virtualPathData.VirtualPath只返回一个url,表示路由表中的第一个路由,最后是一个’page’参数,而不是一个代表当前上下文的url.

此外,路由是什么样的将’/ Paging / ViewByCategory？name = Shoes& page = 1’更改为此’/ Categories / Shoes / Page / 1’？

解决方法

我假设你有Paging控制器,这个控制器有ViewByCategory动作.

ViewByCategory看起来像：

public ActionResult ViewByCategory(string categoryName,int? page)
{
  ....
}

路由看起来像

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

    routes.MapRoute(
        "RouteByCategory","Categories/{categoryName}/Page/{page}",new { controller = "Paging",action = "ViewByCategory" }
    );

    routes.MapRoute(
        "RouteByCategoryFirstPage","Categories/{categoryName}",action = "ViewByCategory",page = 1 }
    );

    routes.MapRoute(
        "Default",// Route name
        "{controller}/{action}/{id}",// URL with parameters
        new { controller = "Home",action = "Index",id = "" }  // Parameter defaults
    );
}

protected void Application_Start()
{
    RegisterRoutes(RouteTable.Routes);
}

GeneratePageLink将以’/ Categories / Shoes / Page / 1’格式返回链接,因为它首先匹配路由表中的路由模式.

（编辑：李大同）

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