LINQ to XML(C#)遍历节点以构建字符串? [英] LINQ to XML (C#) Iterate through nodes to build string?

问题描述

我会直接追逐！

这是我的XML，它包含一个文件夹结构和带有md5散列的文件列表.

Here's my XML, it contains a folder structure and a list of files with their md5 hashes.

<?xml version="1.0" encoding="utf-8"?>
<dir name="Root">
  <dir name="Folder01">
    <dir name="SubFolder01">
      <file md5="77c34f94b0827a2a511b7c9113fd8e31" name="file01.lua" />
      <file md5="47e656c824a3de6fd6bdf7429045b570" name="file02.lua" />
      <file md5="8c9d3b467fbb3173bebed99bae400995" name="file03.lua" />
      <file md5="ade88ad29426e49c9a81e923bb428445" name="file04.lua" />
    </dir>
    <dir name="SubFolder02">
      <dir name="SubFolder03">
        <dir name="SubFolder04">
          <file md5="e1a8566380b2a4256e1792b48705058c" name="file.png" />
        </dir>
      </dir>
    </dir>
  </dir>
  <dir name="Folder02">
    <dir name="SubFolder01">
      <file md5="12f6a2a9e85817fdf6f791f1b0fe37b3" name="File01.lua" />
    </dir>
  </dir>
</dir>

我想读入XML并生成带有md5这样的文件列表...

I would like to read in this XML and generate a list of files with their md5's like this...

Root\Folder01\SubFolder01\file01.lua, 77c34f94b0827a2a511b7c9113fd8e31
Root\Folder01\SubFolder01\file02.lua, 47e656c824a3de6fd6bdf7429045b570
Root\Folder01\SubFolder01\file03.lua, 8c9d3b467fbb3173bebed99bae400995
Root\Folder01\SubFolder01\file04.lua, ade88ad29426e49c9a81e923bb428445
Root\Folder01\SubFolder02\SubFolder03\SubFolder04\file.png, e1a8566380b2a4256e1792b48705058c
Root\Folder02\SubFolder01\File01.lua, 12f6a2a9e85817fdf6f791f1b0fe37b3

这是我到目前为止拥有的(破损)代码

This is the (broken) code I have so far

var SingleFiles = SourceXMLFile.Descendants("dir")

               .Select(x => new
               {
                   FileName = (string)x.Attribute("name"),
                   md5 = (string)x.Attribute("md5")
               });

我意识到我需要遍历节点和后代，以基于父代等构建Filename字符串.但是，如果有人可以帮助我，我现在有点疲惫(尝试了很多方法！).非常感谢.

I realise I neeed to iterate through the nodes and descendants to build the Filename string based on parents etc. but I'm a little burnt out at the moment (having tried numerous ways!) if anyone could help I'd be extremely grateful.

更新:Ron.B.I.给出了答案.也许实际上不是答案，但这确实使我朝着正确的方向努力以求自己解决问题.

UPDATE: While the answer given by Ron.B.I. may not have actually been an answer, it did give me a push in the right direction to figure it out myself.

XmlReader rdr = XmlReader.Create(new System.IO.StringReader(XMLasString));
            string newPath = "";
            while (rdr.Read())
            {
                if (rdr.NodeType == XmlNodeType.Element)
                {
                    if (rdr.LocalName == "file")
                        Console.WriteLine(newPath + rdr.GetAttribute(1) + " " + rdr.GetAttribute(0));
                    else
                        newPath = newPath + (rdr.GetAttribute(0)) + Path.DirectorySeparatorChar;
                }
            }

我现在要遍历其他答案，并标记为最佳"答案.感谢您的所有帮助.

I'm going to go through the other answers now and mark the 'best' one. Thanks for all your help.

推荐答案

var doc = XDocument.Parse(xml);
string[] filesAndMD5 = doc.Descendants("file")
                          .Select(node => GetFullPath(node) + ", " + node.Attribute("md5").Value)
                          .ToArray();                             

filesAndMD5.ForEach(Console.WriteLine);

public string GetFullPath(XElement node)
{
    string res = "";

    while(node != null)
    {
        res = Path.Combine(node.Attribute("name").Value, res);
        node = node.Parent;
    }
    return res;
}

打印:

Root\Folder01\SubFolder01\file01.lua, 77c34f94b0827a2a511b7c9113fd8e31
Root\Folder01\SubFolder01\file02.lua, 47e656c824a3de6fd6bdf7429045b570
Root\Folder01\SubFolder01\file03.lua, 8c9d3b467fbb3173bebed99bae400995
Root\Folder01\SubFolder01\file04.lua, ade88ad29426e49c9a81e923bb428445
Root\Folder01\SubFolder02\SubFolder03\SubFolder04\file.png, e1a8566380b2a4256e1792b48705058c
Root\Folder02\SubFolder01\File01.lua, 12f6a2a9e85817fdf6f791f1b0fe37b3

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