ASP.NET利用xpath來取得單一(SelectSingleNode)或多個(SelectNodes)xml node的運用

2008-08-13

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ASP.NET

要如何取出xml檔某結點裡的內容或屬性內容....
有一個簡單的範例..使用xpath作法...

小弟最近在討論區看到很多人問有關xml的問題...就給它記錄在我的blog裡...

假設有一個xml檔內容如下..

<?xml version="1.0" encoding="utf-8" ?> <A> <C c1="東京">JAPAN</C> <C c1="台北">TAIWAN</C> <C c1="台南">TAIWAN</C> <C c1="北京">CHINA</C> </A>

要如何取出xml檔某結點裡的內容或屬性內容....下面有一個簡單的範例..使用xpath作法...

asp.net(c#)部分程式碼

using System; using System.Collections; using System.Configuration; using System.Data; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml; public partial class XPATH : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(Server.MapPath("XML.xml"));//載入xml檔 string xPathExpression1 = "/A/B/C[.='TAIWAN']";//找node裡有'TAIWAN' XmlNodeList nodelist = xmldoc.SelectNodes(xPathExpression1);//multi node string xPathExpression2 = "/A/B/C[@c1='台北']";//找node屬性有'台北' XmlNode node = xmldoc.SelectSingleNode(xPathExpression2);//single node //輸出結果：TAIWAN Response.Write(node.OuterXml); Response.Write(""); //輸出結果：台北台南 foreach (XmlNode item in nodelist) { Response.Write(item.Attributes["c1"].Value); Response.Write("<br/" + ">"); } } }

執行結果:

參考網址:

http://www.blueshop.com.tw/board/show.asp?subcde=BRD20080813032057V4N&fumcde=FUM20041006161839LRJ
http://www.java2s.com/Code/CSharp/XML/ReadXMLnodeusingtheXMLpath.htm

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