使用linq从xml中删除重复的元素(具有特定值) [英] remove a duplicate element(with specific value) from xml using linq

问题描述

如果我有这个xml

<?xml version="1.0" encoding="utf-8"?>
<super>
  <A value="1234">
    <a1 xx="000" yy="dddddd" />
    <a1 xx="111" yy="eeeeee" />
    <a1 xx="222" yy="ffffff"/>
  </A>
</super>

，我需要完全删除a1元素(具有xx = 222).为什么使用我的代码不会发生这种情况?我意识到只有将它放在第一个元素的情况下它才会删除它(即，如果我要删除具有x = 000的a1，它将从第一个元素开始删除它)，为什么呢?

and I need to remove a1 element (that have xx=222) completely. why this won't happen using my code?? i realized that it will delete it only if it was placed the first element(i.e, if i want to delete a1 that have x=000 , it will delete it since its the first one), why is that??

代码有什么问题?

var employee = from emp in element.Elements("A")
    where (string)emp.Element("a1").Attribute("xx") == "222"
    select emp.Element("a1");

foreach (var empployee_1 in employee)
{
    empployee_1.Remove();
}

element.Save(@"TheLocation");

非常感谢

推荐答案

可以尝试一下吗，

 using System.Linq;
 using System.Xml.Linq;
 using System.Xml.XPath;

 var element = XElement.Parse(@"<?xml version=""1.0"" encoding=""utf-8""?>
                            <super>
                              <A value=""1234"">
                                <a1 xx=""000"" yy=""dddddd"" />
                                <a1 xx=""111"" yy=""eeeeee"" />
                                <a1 xx=""222"" yy=""ffffff""/>
                              </A>
                            </super>");

  // select all the a1's that have xx = 222
  var a1Elements = element.XPathSelectElement("A/a1[@xx='222']"); 

  if (a1Elements != null)
     a1Elements.Remove();

  Console.WriteLine(element);

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