使用名称空间读取和写入XML文件，而无需遍历每个元素
[英]Reading and writing to an XML file with a namespace without iterating through every element
问题描述
Currently, I am writing to an XML. 
目前，我正在写XML。 While I can indeed write to the XML file, I wish to only write inside the "Fruit" tag, and leave the info under " NODE " untouched. 虽然我确实可以写入XML文件，但我只希望在“ Fruit”标签内写入，而保持“ NODE ”下的信息不变。
Additionally, I wish to modify the "Code" tag that's within the country tag, not the one outside of it. 此外，我希望修改国家/地区代码中的“代码”代码，而不是其外部的代码。
Here's the XML file contents (the URL is a bogus one that I had to sanitize): 这是XML文件的内容（URL是我必须清理的虚假URL）：
<?xml version="1.0" encoding="utf-8"?>
<Native xmlns="URL" version="2.0">
<Header>
<OwnerCode>Bob</OwnerCode>
</Header>
<Body>
<Fruit version="2.0">
<Thing Action="INSERT">
<Name></Name>
<Color></Color>
<Size></Size>
<CountryCode TableName="SQL_Name">
<Code></Code>
</CountryCode>
<Code></Code>
</Thing>
</Fruit>
</Body>
<NODE>
<Name></Name>
<Color></Color>
<Size></Size>
</NODE>
</Native>
Here's the current code: 这是当前代码：
XDocument xdoc = XDocument.Load(NewFilePath);
foreach (XElement element in xdoc.Descendants())
{
switch (element.Name.LocalName)
{
case "Name":
element.Value = "Apple";
break;
case "Color":
element.Value = "Red";
break;
case "Size":
element.Value = "Big";
break;
}
}
xdoc.Save(NewFilePath);
2 个解决方案
解决方案1
1 已采纳 2018-06-29 19:56:41
You have to first specify the parent desired to only then get the descendants. 您必须先指定所需的父代，然后才能获取后代。 The same logic you could apply to modify the Code tag: 您可以应用相同的逻辑来修改Code标签：
XDocument xdoc = XDocument.Load(NewFilePath);
XNamespace xn = "URL";
foreach (XElement element in xdoc.Descendants(xn+"Fruit").Descendants())
{
switch (element.Name.LocalName)
{
case "Name":
element.Value = "Apple";
break;
case "Color":
element.Value = "Red";
break;
case "Size":
element.Value = "Big";
break;
}
}
foreach(var el in xdoc.Descendants(xn+"Code").Where(x=>x.Parent.Name==xn+"CountryCode"))
{
el.Value="Test";
}
xdoc.Save(NewFilePath);
解决方案2
0 2018-06-29 20:07:07
Instead of looping over elements, they can be addressed directly. 无需循环遍历元素，而是可以直接对其进行寻址。
XNamespace ns = "URL";
XElement thing = doc.Element(ns + "Native").Element(ns + "Body").Element(ns + "Fruit").Element(ns +"Thing");
thing.Element(ns + "Name").Value = "Apple";
thing.Element(ns + "Color").Value = "Red";
thing.Element(ns + "Size").Value = "Big";
thing.Element(ns + "CountryCode").Element(ns + "Code").Value = "new-country-code";
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