ASP.NET 如何取得 Request URL 的各个部分

发布时间：2016-06-21责任编辑：朱明浏览：2773

我们在开发网页应用程序,时常需要去解析网址(Request.Url)的每个片段,进行一些判断｡例如说 "http://localhost:1897/News/Press/Content.aspx/123?id=1#toc",我们想要取得网址里第一层目录的名字(News)用以判断不同的页面标题(Page Title)｡

我看很多人都用字符串的 IndexOf 方法与 Substring 方法:

Request.Url.PathAndQuery.Substring(1, Request.Url.PathAndQuery.IndexOf("/", 1)-1)

这实在太埋没 .NET 的强大设计了,事实上在 Request 对象就已经提供很多方便的属性(Property)可供取得网址的片段｡

底下这张表就是各种跟 Browser Request 的网址相关的属性与用法:

网址:http://localhost:1897/News/Press/Content.aspx/123?id=1#toc

Request.ApplicationPath /

Request.PhysicalPath D:ProjectsSolutionwebNewsPressContent.aspx

System.IO.Path.GetDirectoryName(Request.PhysicalPath) D:ProjectsSolutionwebNewsPress

Request.PhysicalApplicationPath D:ProjectsSolutionweb

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

所以当你看了这张表之后,你还会想用 Request.Url.PathAndQuery.Substring(1, Request.Url.PathAndQuery.IndexOf("/", 1)-1) 这种写法吗?

用这样写 Request.Url.Segments[1].Replace("/", "") 不是又短又直觉吗? ^_^

以下是产生以上表格的程序代码:

protected void Page_Load(object sender, EventArgs e)

{

StringBuilder sb = new StringBuilder();

sb.Append("

");

sb.Append("

");

sb.Append("网址:" sb.Append(""); ");

// Request.ApplicationPath

sb.Append("

");

sb.Append("Request.ApplicationPath");

sb.Append("

");

sb.Append("" + Request.ApplicationPath + "");

sb.Append("");

// Request.PhysicalPath

sb.Append("

");

sb.Append("Request.PhysicalPath");

sb.Append("

");

sb.Append("" + Request.PhysicalPath + "");

sb.Append("");

// System.IO.Path.GetDirectoryName(Request.PhysicalPath)

sb.Append("

");

sb.Append("System.IO.Path.GetDirectoryName(Request.PhysicalPath)");

sb.Append("

");

sb.Append("" + System.IO.Path.GetDirectoryName(Request.PhysicalPath) + "");

sb.Append("");

// Request.PhysicalApplicationPath

sb.Append("

");

sb.Append("Request.PhysicalApplicationPath");

sb.Append("

");

sb.Append("" + Request.PhysicalApplicationPath + "");

sb.Append("");

// System.IO.Path.GetFileName(Request.PhysicalPath)

sb.Append("

");

sb.Append("System.IO.Path.GetFileName(Request.PhysicalPath)");

sb.Append("

");

sb.Append("" + System.IO.Path.GetFileName(Request.PhysicalPath) + "");

sb.Append("");

// Request.CurrentExecutionFilePath

sb.Append("

");

sb.Append("Request.CurrentExecutionFilePath");

sb.Append("

");

sb.Append("" + Request.CurrentExecutionFilePath + "");

sb.Append("");

// Request.FilePath

sb.Append("

");

sb.Append("Request.FilePath");

sb.Append("

");

sb.Append("" + Request.FilePath + "");

sb.Append("");

// Request.Path

sb.Append("

");

sb.Append("Request.Path");

sb.Append("

");

sb.Append("" + Request.Path + "");

sb.Append("");

// Request.RawUrl

sb.Append("

");

sb.Append("Request.RawUrl");

sb.Append("

");

sb.Append("" + Request.RawUrl + "");

sb.Append("");

// Request.Url.AbsolutePath

sb.Append("

");

sb.Append("Request.Url.AbsolutePath");

sb.Append("

");

sb.Append("" + Request.Url.AbsolutePath + "");

sb.Append("");

// Request.Url.AbsoluteUri

sb.Append("

");

sb.Append("Request.Url.AbsoluteUri");

sb.Append("

");

sb.Append("" + Request.Url.AbsoluteUri + "");

sb.Append("");

// Request.Url.Scheme

sb.Append("

");

sb.Append("Request.Url.Scheme");

sb.Append("

");

sb.Append("" + Request.Url.Scheme + "");

sb.Append("");

// Request.Url.Host

sb.Append("

");

sb.Append("Request.Url.Host");

sb.Append("

");

sb.Append("" + Request.Url.Host + "");

sb.Append("");

// Request.Url.Port

sb.Append("

");

sb.Append("Request.Url.Port");

sb.Append("

");

sb.Append("" + Request.Url.Port + "");

sb.Append("");

// Request.Url.Authority

sb.Append("

");

sb.Append("Request.Url.Authority");

sb.Append("

");

sb.Append("" + Request.Url.Authority + "");

sb.Append("");

// local Request.Url.LocalPath

sb.Append("

");

sb.Append("Request.Url.LocalPath");

sb.Append("

");

sb.Append("" + Request.Url.LocalPath + "");

sb.Append("");

// Request.PathInfo

sb.Append("

");

sb.Append("Request.PathInfo");

sb.Append("

");

sb.Append("" + Request.PathInfo + "");

sb.Append("");

// Request.Url.PathAndQuery

sb.Append("

");

sb.Append("Request.Url.PathAndQuery");

sb.Append("

");

sb.Append("" + Request.Url.PathAndQuery + "");

sb.Append("");

// Request.Url.Query

sb.Append("

");

sb.Append("Request.Url.Query");

sb.Append("

");

sb.Append("" + Request.Url.Query + "");

sb.Append("");

// Request.Url.Fragment

// 原则上你应该无法从 Request.Url.Fragment 取得任何数据,因为通常 Browser 不会送出 #toc 这个部分

sb.Append("

");

sb.Append("Request.Url.Fragment");

sb.Append("

");

sb.Append("" + Request.Url.Fragment + "");

sb.Append("");

// Request.Url.Segments

sb.Append("

");

sb.Append("

");

sb.Append("Request.Url.Segments");

sb.Append("");

sb.Append("

");

string[] segments = Request.Url.Segments;

foreach (string s in segments)

{

sb.Append("" + s + "");

sb.Append("
");

}

sb.Append("");

ltlTable.Text = sb.ToString();

}

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