为什么此代码在 xml 元素中找不到任何重复项？

Question

这是输入 xml：

<?xml version="1.0"?>
<StateSeparationRequestCollection xsi:schemaLocation="https://uidataexchange.org/schemas SeparationRequest.xsd" xmlns="https://uidataexchange.org/schemas" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <StateSeparationRequest>
    <StateRequestRecordGUID>30000000000000000000000000004000</StateRequestRecordGUID>
        <SSN>999999999</SSN>
    </StateSeparationRequest>
    <StateSeparationRequest>
    <StateRequestRecordGUID>30000000000000000000000000004000</StateRequestRecordGUID>
        <SSN>999999999</SSN>
    </StateSeparationRequest>
</StateSeparationRequestCollection>

我试图在 StateRequestRecordGUID 中查找重复的元素值，如果找到重复项，请将其从文档中删除。

这是我的代码：

XDocument doc = XDocument.Load(xmlreader);
XNamespace ns = "https://uidataexchange.org/schemas";

var duplicates = (from req in doc.Descendants(ns + "StateSeparationRequest")
                  group req by req.Descendants(ns + "StateRequestRecordGUID").First().Value
                  into g
                  where g.Count() > 1
                  select g.Skip(1)).SelectMany(elements => elements);
foreach (var duplicate in duplicates)
{
    duplicate.Remove();
}

var node = doc.Descendants(ns + "EmployerTPASeparationRequest");
var node2 = node.ElementAt(i);
string _StateRequestRecordGUID = "";

foreach (var element in node2.Elements())
{ ...

输出应该是这样的：

<?xml version="1.0"?>
<StateSeparationRequestCollection xsi:schemaLocation="https://uidataexchange.org/schemas SeparationRequest.xsd" xmlns="https://uidataexchange.org/schemas" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <StateSeparationRequest>
    <StateRequestRecordGUID>30000000000000000000000000004000</StateRequestRecordGUID>
        <SSN>999999999</SSN>
    </StateSeparationRequest>
</StateSeparationRequestCollection>

Answer 1

你可以试试这个：

var dups = doc.Descendants(ns + "StateSeparationRequest").GroupBy(e => e.Descendants(ns +"StateRequestRecordGUID").First().ToString());
//remove the duplicates
foreach (XElement ele in dups.SelectMany(g => g.Skip(1)))
    ele.Remove();

Answer 2

我错过了未在 xml 文件中显示的父节点。我需要添加一个名为 EmployerTPASeperationRequest 的父级，然后在 from 语句中使用它。