ASP.NET用XPath查询XML格式字符串

 2008-08-12 16:32

有XML格式的内容如下：

         <单选题 选项数="2">

                    <题目内容>我帅吗？</题目内容>

                    <选项 ident="A">帅<选项>

                     <选项 ident="B">不太帅<选项>

          </单项题>

StringBuilder builder = new StringBuilder(500);
builder.Append ("上面那个字符串");
XPathDocument xpdoc=new XPathDocument(new StringReader(builder.ToString ()));
XPathNavigator nav=xpdoc.CreateNavigator();
XPathNavigator nav1 = nav.SelectSingleNode("Xpath查询串");
属性值= nav1.TypedValue.ToString();

查属性值：
“选项数”   /单选题/@选项数

"A"                /单选题/选项/@ident

"B"              /单选题/选项[2]/@ident

查节点内容

XPathNodeIterator xpnitor = nav.Select("/Xpath查询串");
foreach (XPathItem item in xpnitor)
      内容 = item.Value.ToString();

查“选项”        /单选题/选项

查“A”             /单选题/选项[@ident='A']