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我們在開發(fā)網(wǎng)頁應(yīng)用程式,時常需要去解析網(wǎng)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(wǎng)址裡第一層目錄的名字(News)用以判斷不同的頁面標(biāo)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(shè)計了,事實上在 Request 物件就已經(jīng)提供很多方便的屬性(Property)可供取得網(wǎng)址的片段。
底下這張表就是各種跟 Browser Request 的網(wǎng)址相關(guān)的屬性與用法:
Response.Redirect(Request.RawUrl)中
Request.RawUrl表示當(dāng)前頁面,獲取當(dāng)前請求的原始 URL。定向到本身,但是又不想寫url
Response.Redirect重新打開頁面。
| 網(wǎng)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(dāng)你看了這張表之后,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(chǎn)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(wǎng)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&g