我想通过linq在csv中保存我的xml,我有问题。
这个括号在这里没有它这个代码没有显示(为什么?)
<results>
<Countries country="Albania">
<Regions region="Centralna Albania">
<Provinces province="Durres i okolice">
<Cities city="Durres" cityCode="2B66E0ACFAEF78734E3AF1194BFA6F8DEC4C5760">
<IndividualFlagsWithForObjects Status="1" />
<IndividualFlagsWithForObjects Status="0" />
<IndividualFlagsWithForObjects magazyn="2" />
</Cities>
</Provinces>
</Regions>
</Countries>
<Countries country="Albania">
<Regions region="Centralna Albania">
<Provinces province="Durres i okolice">
<Cities city="Durres" cityCode="2B66E0ACFAEF78734E3AF1194BFA6F8DEC4C5760">
<IndividualFlagsWithForObjects storage="0" Status="1" />
<IndividualFlagsWithForObjects storage="1" Status="0" />
<IndividualFlagsWithForObjects storage="2" Status="1" />
</Cities>
</Provinces>
</Regions>
</Countries>
</results>
我必须指出一件重要的事情: 父节点是 但是当我使用它时,装载了它。后代(“结果”)它什么都没给我。
XDocument loaded = XDocument.Load(@"c:\citiesxml.xml");
// create a writer and open the file
TextWriter tw = new StreamWriter("c:\\XmltoCSV.txt");
// Query the data and write out a subset of contacts
var contacts = (from c in loaded.Descendants("Countries")
select new
{
Country = (string)c.Attribute("ountry").Value,
Region = (string)c.Element("Regions").Attribute("region").Value,
Province= c.Element("Regions").Element("Provinces").Attribute("prowincja").Value,
City= c.Element("Regions").Element("Provinces").Element("Cities").Attribute("city").Value,
Kod = c.Element("Regions").Element("Provinces").Element("Cities").Attribute("cityCode").Value,
IndywidualnaFlagaStatus = c.Element("Regions").Element("Provinces").Element("Cities").Element("IndividualFlagsWithForObjects").Attribute("Status"),
IndywidualnaFlagaWartosc = c.Element("Regions").Element("Provinces").Element("Cities").Element("IndividualFlagsWithForObjects").Attribute("storage")
}).ToList();
最后一个问题:
IndywidualnaFlagaWartosc = c.Element("Regions").Element("Provinces").Element("Cities").Element("IndividualFlagsWithForObjects").Attribute("storage")
给了我:
IndywidualnaFlagaWartosc = {storage="0"} (I see this while debugging)
答案 0 :(得分:4)
var contacts = (from c in loaded.Descendants("Countries")
select new
{
Country = (string)c.Attribute("Country").Value,
Region = (string)c.Element("Regions").Attribute("region").Value,
Province = (string)c.Element("Regions").Element("Provinces").Attribute("province").Value,
City = (string)c.Element("Regions").Element("Provinces").Element("Cities").Attribute("city").Value,
Hotel = (string)c.Element("Hotels").Attribute("hotel").Value
}).ToList();
酒店不在您的xml中,因此需要进行调整。我通常会建议您拉一次每个项目并检查空值,而不是像我在这里那样拉动区域3次。
答案 1 :(得分:1)
Yout元素名称与您的xml剪辑不匹配(片段中的所有元素都是单数,在您的linq查询中它们是复数(国家/地区,国家/地区,区域等)。
var contacts = (from c in loaded.Descendants("Countries")
select new
{
Country = c.Element("Countries").Value,
Region = c.Element("Regions").Value,
Province= c.Element("Provinces").Value,
City = c.Element("Cities").Value,
Hotel = c.Element("Hotels").Value
}).ToList();
答案 2 :(得分:1)
您正在请求元素作为对象,而不是它的值。你的代码应该是:
var contacts = (from c in loaded.Descendants("Countries")
select new
{
Country = c.Element("Country").Value,
Region = c.Element("region").Value,
Province= c.Element("province").Value,
City = c.Element("city").Value,
Hotel = c.Element("hotel").Value
}).ToList();
但是如果我查看你的XML,我不确定这会给出任何结果。我猜这应该给你想要的结果:
var contacts = (from c in loaded.Descendants("Countries")
select new
{
Country = c.Attribute("country").Value,
Region = c.Descendants("Regions").FirstOrDefault().Attribute("region")Value,
Province= c.Descendants("Provinces").FirstOrDefault().Attribute("province").Value,
City = c.Descendants("Cities").FirstOrDefault().Attribute("city").Value,
Hotel = c.Descendants("Hotels").FirstOrDefault().Attribute("hotel").Value
}).ToList();
请注意,此代码非常脆弱,因为如果缺少其中一个正面元素,则会发生异常。你应该做一些微调,以获得你想要的结果。
答案 3 :(得分:1)
对不起,这个答案还不完整。除了具有以下代码的Country之外,你不会得到任何值,但它应该是一个很好的起点,所以尝试使用c.Element(),你应该像这样使用c.Attribute():
var contacts = (from c in loaded.Descendants("Countries")
select new
{
Country = (string)c.Attribute("country"),
Region = (string)c.Attribute("region"),
Province = (string)c.Attribute("province"),
City = (string)c.Attribute("city"),
Hotel = (string)c.Attribute("hotel")
}).ToList();