C#XmlDocument SelectNodes无法正常工作 [英] C# XmlDocument SelectNodes is not working
本文介绍了C#XmlDocument SelectNodes无法正常工作的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想从XML文件中获取值,但是失败了.您能帮我指出问题吗?因为我已经非常努力地进行测试和谷歌搜索,但是仍然无法发现问题.
I want to get the value from XML file but I failed. Can you please help me point out the problem ?? Because I already tried very hard to test and googling but I still can't spot the problem.
XML:
<?xml version="1.0" encoding="utf-8" ?>
<Contacts>
- <Contact>
<ID>xxx</ID>
<AutoUpdateEnabled>false</AutoUpdateEnabled>
<LastChanged>2013-05-29T01:53:59.4470000Z</LastChanged>
- <Profiles>
- <Personal>
<FirstName>My First Name</FirstName>
<LastName>My Last Name</LastName>
<UniqueName>My Unique Name</UniqueName>
<SortName></SortName>
<DisplayName>My Display Name</DisplayName>
</Personal>
</Profiles>
- <Phones>
- <Phone>
<ID>3</ID>
<PhoneType>Mobile</PhoneType>
<Number>000-0000000</Number>
<IsIMEnabled>false</IsIMEnabled>
<IsDefault>false</IsDefault>
</Phone>
</Phones>
- <Locations>
- <Location>
<ID>2</ID>
<LocationType>Business</LocationType>
<CompanyName></CompanyName>
<IsDefault>false</IsDefault>
</Location>
</Locations>
</Contact>
- <Contact>
<ID>xxx</ID>
<AutoUpdateEnabled>false</AutoUpdateEnabled>
<LastChanged>2013-05-29T01:53:25.2670000Z</LastChanged>
- <Profiles>
- <Personal>
<FirstName>Person</FirstName>
<LastName>Two</LastName>
<UniqueName></UniqueName>
<SortName></SortName>
<DisplayName>Person Two</DisplayName>
</Personal>
</Profiles>
- <Emails>
- <Email>
<ID>1</ID>
<EmailType>Personal</EmailType>
<Address>MyTest@gmail.com</Address>
<IsIMEnabled>false</IsIMEnabled>
<IsDefault>true</IsDefault>
</Email>
</Emails>
- <Locations>
- <Location>
<ID>2</ID>
<LocationType>Business</LocationType>
<CompanyName>Testing Company</CompanyName>
<IsDefault>false</IsDefault>
</Location>
</Locations>
</Contact>
</Contacts>
我的示例代码:
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml("TheXMLFile.xml");
xmldoc.DocumentElement.SelectNodes("contact") // return 0 counts
xmldoc.DocumentElement.SelectNodes("/contact") // return 0 counts
xmldoc.DocumentElement.SelectNodes("/contact") // return 0 counts
xmldoc.DocumentElement.SelectNodes("/contacts/contact") // return 0 counts
xmldoc.DocumentElement.SelectNodes("*") // return 2 counts !this works
XmlNodeList elemList = xmldoc.DocumentElement.GetElementsByTagName("contact"); // return 2 counts !this also works
foreach (XmlNode node in elemList)
{
node.SelectSingleNode("Profiles") //return ""
node.SelectSingleNode("/Profiles") //return ""
node.SelectSingleNode("//Profiles") //return ""
node.SelectSingleNode(".//Profiles") //return ""
}
我只想获取名字,姓氏,电子邮件地址", SelectNodes
函数无法正常工作...根本不知道...请帮助.预先感谢
I just want to get "FirstName, LastName, Email Address", the SelectNodes
function just not working like expected... No clue at all ... please help. Thanks in advance
推荐答案
您需要这样的内容:
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(@"D:\temp\contacts.xml"); // use the .Load() method - not .LoadXml() !!
// get a list of all <Contact> nodes
XmlNodeList listOfContacts = xmldoc.SelectNodes("/Contacts/Contact");
// iterate over the <Contact> nodes
foreach (XmlNode singleContact in listOfContacts)
{
// get the Profiles/Personal subnode
XmlNode personalNode = singleContact.SelectSingleNode("Profiles/Personal");
// get the values from the <Personal> node
if (personalNode != null)
{
string firstName = personalNode.SelectSingleNode("FirstName").InnerText;
string lastName = personalNode.SelectSingleNode("LastName").InnerText;
}
// get the <Email> nodes
XmlNodeList emailNodes = singleContact.SelectNodes("Emails/Email");
foreach (XmlNode emailNode in emailNodes)
{
string emailTyp = emailNode.SelectSingleNode("EmailType").InnerText;
string emailAddress = emailNode.SelectSingleNode("Address").InnerText;
}
}
通过这种方法,您应该能够正确读取所需的所有数据.
With this approach, you should be able to read all the data you need properly.
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