ASP.NET MVC學習筆記-Routing及視圖引摯解析原理

2019-11-17 04:02:20

字體：大中小

來源：轉載

供稿：網友

首先打開項目的Global.asax.cs文件,我們將看到頁面重寫規則如下:

view plaincopy to clipboardPRint?
·········10········20········30········40········50········60········70········80········90········100·······110·······120·······130·······140·······150
public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
    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);
}
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            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);
        }

MapRoute()重載如下:

view plaincopy to clipboardprint?
MapRoute( string name, string url);
MapRoute( string name, string url, object defaults);
MapRoute( string name, string url, string[] namespaces);
MapRoute( string name, string url, object defaults, object constraints);
MapRoute( string name, string url, object defaults, string[] namespaces);
MapRoute( string name, string url, object defaults, object constraints, string[] namespaces);
MapRoute( string name, string url);
MapRoute( string name, string url, object defaults);
MapRoute( string name, string url, string[] namespaces);
MapRoute( string name, string url, object defaults, object constraints);
MapRoute( string name, string url, object defaults, string[] namespaces);
MapRoute( string name, string url, object defaults, object constraints, string[] namespaces);

創建一個Route類實例,最關鍵的是為以下幾個屬性賦值:

屬性名稱說明舉例
Constraints  獲取或設置為 URL 參數指定有效值的表達式的詞典。  {controller}/{action}/{id}
DataTokens  獲取或設置傳遞到路由處理程序但未用于確定該路由是否匹配 URL 模式的自定義值。  new RouteValueDictionary { { "format", "short" } }
Defaults       獲取或設置要在 URL 不包含所有參數時使用的值。 new { controller = "Home", action = "Index", id = "" }
RouteHandler  獲取或設置處理路由請求的對象。 new MvcRouteHandler()
Url               獲取或設置路由的 URL 模式。  new { controller = @"[^/.]*" }

      asp.net MVC會將url請求根據重寫規則導向相應的controller中，然后在controller中調用相應的view()方法，然后在ViewEngines中找到相匹配的ViewEngine查找并創建View實現頁面解析，ASP.net MVC提供了VirtualPathProviderViewEngine實現了查找View的功能。

     在IViewEngine中提供了母版及視圖的路徑格式字串的屬性，格式如下:

     MasterLocationFormats = new[] {
                "~/Views/{1}/{0}.master",
                "~/Views/Shared/{0}.master"
            };

       ViewLocationFormats = new[] {
                "~/Views/{1}/{0}.aspx",
                "~/Views/{1}/{0}.ascx",
                "~/Views//Shared/{0}.aspx",
                "~/Views/Shared/{0}.ascx"
            };

      PartialViewLocationFormats = ViewLocationFormats;

上一篇：C#只允許啟動一個WinFrom進程的兩種方法

下一篇：JAVA基礎入門:JAVA的數據類型