Request.url用法

Request.url用法

 

我們在開發網頁應用程式，時常需要去解析網址(Request.Url)的每個片段，進行一些判斷。例如說 "http://localhost:1897/News/Press/Content.aspx/123?id=1#toc"，我們想要取得網址裡第一層目錄的名字(News)用以判斷不同的頁面標題(Page Title)。 我看很多人都用字串的 IndexOf 方法與 Substring 方法： Request.Url.PathAndQuery.Substring(1, Request.Url.PathAndQuery.IndexOf("/", 1)-1) 這實在太埋沒 .NET 的強大設計了，事實上在 Request 物件就已經提供很多方便的屬性(Property)可供取得網址的片段。 底下這張表就是各種跟 Browser Request 的網址相關的屬性與用法：   網址：http://localhost:1897/News/Press/Content.aspx/123?id=1#toc Request.ApplicationPath / Request.PhysicalPath D:\Projects\Solution\web\News\Press\Content.aspx System.IO.Path.GetDirectoryName(Request.PhysicalPath) D:\Projects\Solution\web\News\Press Request.PhysicalApplicationPath D:\Projects\Solution\web\ System.IO.Path.GetFileName(Request.PhysicalPath) Content.aspx Request.CurrentExecutionFilePath /News/Press/Content.aspx Request.FilePath /News/Press/Content.aspx Request.Path /News/Press/Content.aspx/123 Request.RawUrl /News/Press/Content.aspx/123?id=1 Request.Url.AbsolutePath /News/Press/Content.aspx/123 Request.Url.AbsoluteUri http://localhost:1897/News/Press/Content.aspx/123?id=1 Request.Url.Scheme http Request.Url.Host localhost Request.Url.Port 1897 Request.Url.Authority localhost:1897 Request.Url.LocalPath /News/Press/Content.aspx/123 Request.PathInfo /123 Request.Url.PathAndQuery /News/Press/Content.aspx/123?id=1 Request.Url.Query ?id=1 Request.Url.Fragment   Request.Url.Segments / News/ Press/ Content.aspx/ 123   所以當你看了這張表之後，你還會想用 Request.Url.PathAndQuery.Substring(1, Request.Url.PathAndQuery.IndexOf("/", 1)-1) 這種寫法嗎？ 用這樣寫 Request.Url.Segments[1].Replace("/", "") 不是又短又直覺嗎？ ^_^ 以下是產生以上表格的程式碼：     protected void Page_Load(object sender, EventArgs e)     {         StringBuilder sb = new StringBuilder();         sb.Append("<table cellpadding=3 cellspacing=0 border=1>");         sb.Append("<tr><td colspan=2>");         sb.Append("網址："http://localhost:1897/News/Press/Content.aspx/123?id=1#toc">http://localhost:1897/News/Press/Content.aspx/123?id=1#toc        sb.Append("</td></tr>"); ");         // Request.ApplicationPath         sb.Append("<tr><td>");         sb.Append("Request.ApplicationPath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.ApplicationPath + "</b>");         sb.Append("</td></tr>");         // Request.PhysicalPath         sb.Append("<tr><td>");         sb.Append("Request.PhysicalPath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.PhysicalPath + "</b>");         sb.Append("</td></tr>");         // System.IO.Path.GetDirectoryName(Request.PhysicalPath)         sb.Append("<tr><td>");         sb.Append("System.IO.Path.GetDirectoryName(Request.PhysicalPath)");         sb.Append("</td><td>");         sb.Append("<b>" + System.IO.Path.GetDirectoryName(Request.PhysicalPath) + "</b>");         sb.Append("</td></tr>");         // Request.PhysicalApplicationPath         sb.Append("<tr><td>");         sb.Append("Request.PhysicalApplicationPath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.PhysicalApplicationPath + "</b>");         sb.Append("</td></tr>");         // System.IO.Path.GetFileName(Request.PhysicalPath)         sb.Append("<tr><td>");         sb.Append("System.IO.Path.GetFileName(Request.PhysicalPath)");         sb.Append("</td><td>");         sb.Append("<b>" + System.IO.Path.GetFileName(Request.PhysicalPath) + "</b>");         sb.Append("</td></tr>");         // Request.CurrentExecutionFilePath         sb.Append("<tr><td>");         sb.Append("Request.CurrentExecutionFilePath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.CurrentExecutionFilePath + "</b>");         sb.Append("</td></tr>");         // Request.FilePath         sb.Append("<tr><td>");         sb.Append("Request.FilePath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.FilePath + "</b>");         sb.Append("</td></tr>");         // Request.Path         sb.Append("<tr><td>");         sb.Append("Request.Path");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Path + "</b>");         sb.Append("</td></tr>");         // Request.RawUrl         sb.Append("<tr><td>");         sb.Append("Request.RawUrl");         sb.Append("</td><td>");         sb.Append("<b>" + Request.RawUrl + "</b>");         sb.Append("</td></tr>");         // Request.Url.AbsolutePath         sb.Append("<tr><td>");         sb.Append("Request.Url.AbsolutePath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.AbsolutePath + "</b>");         sb.Append("</td></tr>");         // Request.Url.AbsoluteUri         sb.Append("<tr><td>");         sb.Append("Request.Url.AbsoluteUri");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.AbsoluteUri + "</b>");         sb.Append("</td></tr>");         // Request.Url.Scheme         sb.Append("<tr><td>");         sb.Append("Request.Url.Scheme");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.Scheme + "</b>");         sb.Append("</td></tr>");         // Request.Url.Host         sb.Append("<tr><td>");         sb.Append("Request.Url.Host");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.Host + "</b>");         sb.Append("</td></tr>");         // Request.Url.Port         sb.Append("<tr><td>");         sb.Append("Request.Url.Port");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.Port + "</b>");         sb.Append("</td></tr>");         // Request.Url.Authority         sb.Append("<tr><td>");         sb.Append("Request.Url.Authority");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.Authority + "</b>");         sb.Append("</td></tr>");         // local Request.Url.LocalPath         sb.Append("<tr><td>");         sb.Append("Request.Url.LocalPath");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.LocalPath + "</b>");         sb.Append("</td></tr>");         // Request.PathInfo         sb.Append("<tr><td>");         sb.Append("Request.PathInfo");         sb.Append("</td><td>");         sb.Append("<b>" + Request.PathInfo + "</b>");         sb.Append("</td></tr>");         // Request.Url.PathAndQuery         sb.Append("<tr><td>");         sb.Append("Request.Url.PathAndQuery");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.PathAndQuery + "</b>");         sb.Append("</td></tr>");         // Request.Url.Query         sb.Append("<tr><td>");         sb.Append("Request.Url.Query");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.Query + "</b>");         sb.Append("</td></tr>");         // Request.Url.Fragment         // 原則上你應該無法從 Request.Url.Fragment 取得任何資料，因為通常 Browser 不會送出 #toc 這個部分         sb.Append("<tr><td>");         sb.Append("Request.Url.Fragment");         sb.Append("</td><td>");         sb.Append("<b>" + Request.Url.Fragment + "</b>");         sb.Append("</td></tr>");         // Request.Url.Segments         sb.Append("<tr>");         sb.Append("<td>");         sb.Append("Request.Url.Segments");         sb.Append("</td>");         sb.Append("<td>");         string[] segments = Request.Url.Segments;         foreach (string s in segments)         {             sb.Append("<b>" + s + "</b>");             sb.Append("<br/>");         }         sb.Append("</td>");         sb.Append("</tr>");         sb.Append("</table>");         ltlTable.Text = sb.ToString();     }