在C＃中创建表示文件夹结构（包括子文件夹）的XML文件

问题描述

如何生成一个结构化给定文件夹的XML文件，以递归表示所有文件&

How can produce an XML file structuring a given folder to recursively represent all the files & subfolders within it?

推荐答案

那是一个很好的问题示例，可以使用递归算法轻松解决！

That's great example of problem, that can be easily solved using recursive algorithm!

伪代码：

function GetDirectoryXml(path)
    xml := "<dir name='" + path + "'>"

    dirInfo := GetDirectoryInfo(path)
    for each file in dirInfo.Files
        xml += "<file name='" + file.Name + "' />"
    end for

    for each subDir in dirInfo.Directories
        xml += GetDirectoryXml(subDir.Path)
    end for

    xml += "</dir>"

    return xml
end function

C＃和 DirectoryInfo / XDocument / XElement 这样的类：

It can be done with C# and DirectoryInfo/XDocument/XElement classes like that:

public static XElement GetDirectoryXml(DirectoryInfo dir)
{
    var info = new XElement("dir",
                   new XAttribute("name", dir.Name));

    foreach (var file in dir.GetFiles())
        info.Add(new XElement("file",
                     new XAttribute("name", file.Name)));

    foreach (var subDir in dir.GetDirectories())
        info.Add(GetDirectoryXml(subDir));

    return info;
}

用法示例：

static void Main(string[] args)
{
    string rootPath = Console.ReadLine();
    var dir = new DirectoryInfo(rootPath);

    var doc = new XDocument(GetDirectoryXml(dir));

    Console.WriteLine(doc.ToString());

    Console.Read();
}

笔记本电脑上其中一个目录的输出：

Output for one of directories on my laptop:

<dir name="eBooks">
  <file name="Edulinq.pdf" />
  <file name="MCTS 70-516 Accessing Data with Microsoft NET Framework 4.pdf" />
  <dir name="Silverlight">
    <file name="Sams - Silverlight 4 Unleashed.pdf" />
    <file name="Silverlight 2 Unleashed.pdf" />
    <file name="WhatsNewInSilverlight4.pdf" />
  </dir>
  <dir name="Windows Phone">
    <file name="11180349_Building_Windows_Phone_Apps_-_A_Developers_Guide_v7_NoCover (1).pdf" />
    <file name="Programming Windows Phone 7.pdf" />
  </dir>
  <dir name="WPF">
    <file name="Building Enterprise Applications with WPF and the MVVM Pattern (pdf).pdf" />
    <file name="Prism4.pdf" />
    <file name="WPF Binding CheatSheet.pdf" />
  </dir>
</dir>

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