C# 使用 xPath 循环遍历项目
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原文地址: http://stackoverflow.com/questions/945512/
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looping through items using xPath
提问by BoredOfBinary
I am tryng to loop through an xml doc and I am still getting the first element in the second iteration, not sure what I am missing. Can anyone help? Pretty new with Xpath
我正在尝试遍历 xml 文档，但我仍然在第二次迭代中获得第一个元素，不确定我错过了什么。任何人都可以帮忙吗？Xpath 非常新
string file = HttpContext.Current.Server.MapPath("~/XML/Locations.xml");
Dictionary<string, Location> locationCollection = new Dictionary<string, Location>();
XPathDocument xDocument = new XPathDocument(file);
XPathNavigator xPathNavigator = xDocument.CreateNavigator();
foreach (XPathNavigator node in xPathNavigator.Select("//locations/*"))
{
string value = node.SelectSingleNode("/locations/location/cell").Value;
}
<?xml version="1.0" encoding="utf-8" ?>
<locations>
<location>
<locationName>Glendale</locationName>
<street>3717 San Fernando Road</street>
<city>Glendale</city>
<state>CA</state>
<zipcode>91204</zipcode>
<generalManager>DJ Eldon</generalManager>
<phone>(818) 552‐6246</phone>
<tollFree>(888) 600‐6011</tollFree>
<fax>(818) 552‐6248</fax>
<cell>(347) 834‐2249</cell>
<counterEmail>[email protected]</counterEmail>
<directEmail>[email protected]</directEmail>
</location>
<location>
<locationName>Chicago</locationName>
<street>1301 S. Harlem Ave.</street>
<city>Chicago</city>
<state>IL</state>
<zipcode>60402</zipcode>
<generalManager>Dave Schnulle</generalManager>
<phone>(708) 749‐1500</phone>
<tollFree>(888) 966‐1500</tollFree>
<fax>(818) 552‐6248</fax>
<cell>(708) 749‐3800</cell>
<counterEmail>[email protected]</counterEmail>
<directEmail>[email protected]</directEmail>
</location>
</locations>
采纳答案by Jon Skeet
You're effectively ignoring the value of nodeby using a leading slash to get back to the document root. Try this instead:
node通过使用前导斜杠返回文档根目录，您实际上忽略了 的值。试试这个：
// This assumes that there are only location nodes under locations;
// You may want to use //locations/location instead
foreach (XPathNavigator node in xPathNavigator.Select("//locations/*"))
{
string value = node.SelectSingleNode("cell").Value;
// Use value
}
Having said that, is there any reason you're not doing it in a single XPath query?
话虽如此，您是否有任何理由不在单个 XPath 查询中执行此操作？
// Name changed to avoid scrolling :)
foreach (XPathNavigator node in navigator.Select("//locations/location/cell"))
{
string value = node.Value;
// Use value
}
回答by Onots
Try the following:
请尝试以下操作：
XPathNodeIterator ni = xPathNavigator.Select("//locations/*");
while (ni.MoveNext())
{
string value = ni.Current.Value);
}
Just a quick blurt, hope it helps you.
简单粗暴的说一下，希望对你有帮助。
回答by jeremy
you should do:
你应该做：
string value = node.SelectSingleNode("./cell").Value;
When you do xPathNavigator.Select("//locations/*")), you're already inside /locations/location so you need to move just one element down the node, cell in your example.
当您执行 xPathNavigator.Select("//locations/*")) 时，您已经在 /locations/location 中，因此您只需将一个元素向下移动到节点，在您的示例中为单元格。
