使用 Json.net LINQ 从目录创建文件树

Question

使用以下代码：

static void Main(string[] args)
    {
        JObject fileSystemTree = CreateFileSystemJsonTree("C:/DirectoryTree");
        Console.WriteLine(fileSystemTree);
        Console.WriteLine("------");
        //
        //  Write it out to a file
        //
        System.IO.File.WriteAllText(@"C:\jsontree.txt", fileSystemTree.ToString());
        Console.ReadLine();
    }
    static JObject joNew = new JObject();
    static JObject CreateFileSystemJsonTree(string source)
    {
        //
        //  Build a list of all the IPs
        //
        //Console.WriteLine(source);
        using (var poiDbContext = new poiDbEntities())
        {
            DirectoryInfo di = new DirectoryInfo(source);
                {
                    joNew = new JObject(
                        new JProperty(di.Name, new JArray(Directory.GetDirectories(source).Select(d => CreateFileSystemJsonTree(d)))),
                        new JProperty("files", new JArray(di.GetFiles().Select(fi => new JObject(new JProperty(fi.Name, GetText(fi.Name)))))));
                }
                Console.WriteLine(joNew);
        }
        return joNew;
    }
    public static string GetText(string fiName)
    {
        using (var poiDbContext = new poiDbEntities())
        {
            string indexNameBody = fiName.Substring(0, fiName.LastIndexOf('.'));
            var indexResult = "test";  // dummied up for use by evaluators 
            return indexResult.Trim();
        }
    }

我正在尝试使用递归从系统目录创建文件树。我有这个与 XML 一起工作，但更喜欢 JSON 树。问题是 txt 文件出现，而不是父级的 []，它代表最低的文件夹，而是被添加为 JsonProperties，文本名称我添加为 "files"（我不想要）。另外，即使没有文件，例如在空文件夹中，也会生成 "files"。系统生成的代码段后跟可能需要的代码段。

"Sports": [
        {
          "NBA": [],
          "files": []  // Undesirable--The folder is empty`` 
        },``

两个片段：

{  
      "Politics": [  
        {  
          "PresCandidates": [  
            {  
              "Republican": [],   // Notice the files are not in array   within the [] of the Republican    
              "files": [    
                {  
                  "carson_ben_s.txt": "Ben Carson"  
                },  
                {  
                  "trump_donald_j.txt": "Donald Trump"  
                },  
                {
                  "walker_scott_k.txt": "Scott Walker"  
                }  
              ]  
            }  
          ]  
        }  
      ],  
      "Politics": [  // The desired format
        {  
          "PresCandidates": [  
            {  
              "Republican": [  
                                {  
                                    "carson_ben_s.txt": "Ben Carson"  
                                },  
                                {  
                                    "trump_donald_j.txt": "Donald Trump"  
                                },  
                                {  
                                    "walker_scott_k.txt": "Scott Walker"  
                                }  
                            ],

{

Answer 1

我不确定我是否理解您要创建的 JSON。如果您正在寻找一组嵌套的 JSON 对象，其中每个属性名称对应于文件或目录名称，并且对于文件，属性值由某些回调方法给出，而对于子目录，该值是一个递归包含子目录所有内容的对象的对象，您可以这样做：

public static class DirectoryInfoExtensions
{
    public static JObject ToJson<TResult>(this DirectoryInfo info, Func<FileInfo, TResult> getData)
    {
        return new JObject
            (
            info.GetFiles().Select(f => new JProperty(f.Name, getData(f))).Concat(info.GetDirectories().Select(d => new JProperty(d.Name, d.ToJson(getData))))
            );
    }
}

然后像这样使用它：

        string path = @"C:\Program Files (x86)\Microsoft Visual Studio 9.0";

        var di = new DirectoryInfo(path);
        Debug.WriteLine(di.ToJson(f => f.LastWriteTimeUtc));

产生如下输出：

{
  "redist.txt": "2007-10-16T21:56:34Z",
  "Common7": {
    "IDE": {
      "Brief.vsk": "2007-06-20T21:55:14Z",
      "WinFxCustomControlTemplateWizard.dll": "2008-07-30T14:06:58Z",
      "1033": {
        "cmddefui.dll": "2008-07-30T14:06:58Z",
        "Microsoft.VisualStudio.DesignUI.dll": "2008-07-30T14:06:58Z",
        "Microsoft.VisualStudio.EditorsUI.dll": "2008-07-30T14:06:58Z",

     Many values removed,

        "VsWizUI.dll": "2008-07-30T14:06:58Z",
        "WindowsFormsIntegration.PackageUI.dll": "2008-07-30T14:06:58Z"
      },
      "en": {
        "Microsoft.VisualStudio.Package.LanguageService.xml": "2007-03-02T04:30:40Z",
        "Microsoft.VisualStudio.Shell.Design.xml": "2007-03-06T04:40:44Z",
        "Microsoft.VisualStudio.Shell.xml": "2007-03-06T04:40:44Z"
      },
      "ExceptionAssistantContent": {
        "1033": {
          "DefaultContent.xml": "2007-09-03T05:11:44Z"
        }
      }
    }
  }
}

这是你想要的吗？您的部分 JSON 示例包含数组，但我看不到您在哪里或如何需要它们。

如果这不是您想要的，您能否澄清一下所需的 JSON 格式？

顺便说一下，如果你有 XML 工作，你总是可以使用 JsonConvert.SerializeXNode()。

Answer 2

你的想法很成功。谢谢你。我有一个评论和另一个问题。我知道 json 文件树没有标准格式。但是，每个文件夹都应该以 [] 开头和结尾，因为它们是 而不是 "leaf" 节点，这难道没有意义吗？我试图修改你的代码，使它看起来像下面这样，但没有成功。我添加了时间戳。

{ "7/28/2015 6:00:45 PM": // Modified by hand lennane_ava_l.txt": "Ava Lennane", "ALists": [ // Modified by hand "clinton_hillary_r.txt": "Hillary Clinton", "depasquale_vincent_99.txt": "Vincent Depasquale", "trump_donald_j.txt": "Donald Trump", "zz_kilroy_99.txt": "Kilroy", "Criminals": [], // Modified by hand "Entertainment": [], // Modified by hand "Politics": [ // Modified by hand "clinton_hillary_r.txt": "Hillary Clinton", "lennane_james_p.txt": "Jim Lennane", "trump_donald_j.txt": "Donald Trump", "PresCandidates": { // Unmodified "clinton_hillary_r.txt": "Hillary Clinton", "trump_donald_j.txt": "Donald Trump", "Democrat": { // Unmodified "clinton_hillary_r.txt": "Hillary Clinton" }, "Other": {}, "Republican": { "carson_ben_s.txt": "Ben Carson", "lennane_james_p.txt": "Jim Lennane", "trump_donald_j.txt": "Donald Trump", "walker_scott_k.txt": "Scott Walker"

使用 Json.net LINQ 从目录创建文件树

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