wpf 将子节点添加到 XElement
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Adding child nodes to an XElement
提问by Naaz
I am trying to append objects into an XML file. The problem I currently have is it appends everything at the first level itself. I am trying to have the list as the parent element and list items as the child elements.
我正在尝试将对象附加到 XML 文件中。我目前遇到的问题是它在第一级本身附加了所有内容。我试图将列表作为父元素，将列表项作为子元素。
What I've tried: I came across a few posts where they use loops but I am unable to relate that to my context and code.
我尝试过的：我遇到了一些他们使用循环的帖子，但我无法将其与我的上下文和代码联系起来。
Code:
代码：
XDocument xDocument = XDocument.Load(@"C:\Users\hci\Desktop\Nazish\TangramsTool\TangramsTool\patterndata.xml");
XElement root = xDocument.Element("Patterns");
foreach (Pattern currentPattern in PatternDictionary.Values)
{
String filePath = currentPattern.Name.ToString();
IEnumerable<XElement> rows = root.Descendants("Pattern"); // Returns a collection of the descendant elements for this document or element, in document order.
XElement firstRow = rows.First(); // Returns the first element of a sequence.
if (currentPattern.PatternDistancesList.Count() == 9)
{
firstRow.AddBeforeSelf( //Adds the specified content immediately before this node.
new XElement("Pattern"),
new XElement("Name", filePath.Substring(64)),
new XElement("PatternDistancesList"),
new XElement("PatternDistance", currentPattern.PatternDistancesList[0].ToString()),
new XElement("PatternDistance", currentPattern.PatternDistancesList[1].ToString()),
}
}
Current XML File:
当前 XML 文件：
<Pattern/>
<Name>match.jpg</Name>
<PatternDistancesList/>
<PatternDistance>278</PatternDistance>
<PatternDistance>380</PatternDistance>
What I would like as the end result:
我想要的最终结果是：
<Pattern>
<Name>match.jpg</Name>
<PatternDistancesList>
<PatternDistance>278</PatternDistance>
<PatternDistance>380</PatternDistance>
</PatternDistancesList>
<Pattern/>
Any tips will be much appreciated. I'm new to WPF and C# so still trying to learn things.
任何提示将不胜感激。我是 WPF 和 C# 的新手，所以仍在努力学习。
回答by MarcinJuraszek
This should do the trick:
这应该可以解决问题：
firstRow.AddBeforeSelf(
new XElement("Pattern",
new XElement("Name", filePath.Substring(64)),
new XElement("PatternDistancesList",
new XElement("PatternDistance", currentPattern.PatternDistancesList[0].ToString()),
new XElement("PatternDistance", currentPattern.PatternDistancesList[1].ToString()))));
