读取 XML 文档并删除节点

Question

I have an XML file, similar to the one below. I will read the XML and find the EmpId node. Based on other data will determine if I need to keep this node or delete the node. Currently have a process which reads it and creates a list of Record Ids which I will need to remove. In the below XML I will want to keep the EmpId = Emp1 and remove EmpId = Emp2. The removal is the node.

I believe the best approach is to read the XML first to determine which nodes to keep and then go thru the XML again and remove the necessary nodes.

What's the best approach to remove these nodes?
I'm open to creating a new XML document and creating the node which need to be kept. Based on the data I'm reading it's 50/50 if I'll be removing more nodes or keeping more nodes.

...
<HeaderNode>
  <Details>
    <SubmissionId>1</SubmissionId>
    <EmpDetail>
      <RecordId>1</RecordId>
      <EmpDempgraphic>
        <EmpId>Emp1</EmpId>
      </EmpDempgraphic>
    </EmpDetail>
    <EmpDetail>
      <RecordId>2</RecordId>
      <EmpDempgraphic>
        <EmpId>Emp2</EmpId>
      </EmpDempgraphic>
    </EmpDetail>
  </Details>
</HeaderNode>
...

Answer 1

除非文档很大，否则只需将其加载到XDocument 中， 删除不需要的元素，然后将文档保存回来。

Answer 2

Using Xml Linq :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace XML
{
    class Program
    {
        const string FILENAME = @"c:\temp\test.xml";
        static void Main(string[] args)
        {
            XDocument doc = XDocument.Load(FILENAME);

            XElement EmpDetail = doc.Descendants("EmpDetail").Where(x => (int)x.Element("RecordId") == 2).FirstOrDefault();

            EmpDetail.Remove();

        }
    }
}