ASP.NET 取得 Request URL 的各個部分说明

我们在开发网页应用程式,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 物件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:

網址:http://localhost:1897/News/Press/Content.aspx/123?id=1
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
Request.QueryString["id"] 1

 

 

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式码:

 

    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("网址:"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 

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

        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(); 

    }

 

注意事项
当程式部署(Deploy)到IIS 6 之后,假设你的网址是http://localhost:1897/News/Press/Content.aspx/123? ,IIS 不知为何会将问号( ? ) 给删除掉,以致于ASP.NET 使用Request.Url.Query 是空字串!如果你的程式有判断到这部分时就要特别注意,因为照理说应该会抓到才对!不知道是不是 IIS 6 的 Bug ?

你可能感兴趣的:(asp.net)