放分求一个XML遍历操作的最基础例子，谢谢大家！！
<?xml version="1.0" encoding="UTF-8" ?>
<response>
<result>
<Acc>
<row id="1">
<fie value="f1">a1</fie>
<fie value="f2">a2</fie>
</row>
<row id="2">
<fie value="f1">b1</fie>
<fie value="f2">b2</fie>
</row>
……
</Acc>
</result>
</response>
以上是XML文档，要求遍历每个row，把row下的每个fie节点value值为"f2"的值如"a2,b2"等提取出来放到字符串中，如str = "a2,b2,……"

麻烦各位给个例子，谢谢了！！！！！

[解决办法]
StringBuilder build = new StringBuilder ();
XmlDocument doc = new XmlDocument ();
doc.load(@"D:\1.xml");
XmlNodeList list = doc.DocumentElement.GetElementByName("row");
for(int i=0;i<list.count;i++)
{
for(int j=0;j<list[i].ChildNodes.count ;j++)
{
if(list[i].ChildNodes[j].Attributs["value"].value="f2")
{
build.Append( list[i].ChildNodes[j].innerText);
build.Append(",");
}
}

}
String s = build.ToString();

[解决办法]

C# code

            string str = @"<?xml version=""1.0"" encoding=""UTF-8"" ?><response><result>  <Acc>    <row id=""1"">      <fie value=""f1"">a1 </fie>      <fie value=""f2"">a2 </fie>    </row>    <row id=""2"">      <fie value=""f1"">b1 </fie>      <fie value=""f2"">b2 </fie>    </row>  </Acc></result></response> ";            XmlDocument doc = new XmlDocument();            doc.LoadXml(str);            StringBuilder sb = new StringBuilder();            foreach(XmlNode rowNode in doc.GetElementsByTagName("row"))            {                if (rowNode.HasChildNodes)                {                    foreach (XmlNode fieNode in rowNode.ChildNodes)                    {                        if (fieNode.Name == "fie" && fieNode.Attributes["value"].Value == "f2")                            sb.Append(fieNode.InnerText + ",");                    }                }            }            Console.WriteLine(sb.ToString().TrimEnd(','));