C# 如何使用linq从xml文档中删除重复项？

我有以下代码，需要删除重复的ID并将结果作为字符串返回

scheduledCustomerJourneysXml是一个字符串变量，包含以下xml：

XDocument doc = XDocument.Parse(scheduledCustomerJourneysXml);


<ScheduledCustomerJourneys>
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534454" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534455" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534455" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538020" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538020" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538020" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538020" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="531228" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534457" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="526977" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="526978" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538023" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534459" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534459" />
</ScheduledCustomerJourneys>

您可以使用GroupBy查找重复项，然后删除内存中的重复项并返回字符串表示形式：

doc.Descendants("ScheduledCustomerJourney")
        .GroupBy(x => x.Attribute("ScheduledCustomerJourneyId").Value)
        .SelectMany(x => x.Key == string.Empty ? x : x.Skip(1))
        .Remove();

Console.WriteLine(doc.ToString());

输出：

---

查看

到目前为止您尝试了什么？

<ScheduledCustomerJourneys>
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534454" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534455" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538020" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="531228" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534457" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="526977" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="526978" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="538023" />
  <ScheduledCustomerJourney ScheduledCustomerJourneyId="534459" />
</ScheduledCustomerJourneys>