从递归文件夹获取文件信息

Question

我想做的是从一个文件夹中的每个文件中获取6个文件信息，以及它下面的所有文件夹。这些作品是：

• 输入(您可以在Access中这样做，它将返回"Microsoft工作表“或"Winzip文件”之类的内容，就像您在资源管理器窗口中看到的那样，但我在C#中没有看到这个属性)
• FullName
• 长度
• CreationTime
• LastAccessTime
• LastWriteTime

我有下面的代码，它将列出一个包含path的文件列表，但是我正在努力弄清楚如何在我的输出中获得这个附加信息。如果它可以用分号或别的什么来分隔，那将是很好的，因为最终的愿望是将这个信息写到一个表中。任何帮助都是非常感谢的。

    private void GetMyFiles () {
        string rootDirectory = @"" + txtPathToScan.Text + "";
        string extension = "*";

        List<string> files = GetFilesRecursively (rootDirectory, extension);

        Console.WriteLine ("Got {0} files of extension {1} in directory {2}", files.Count, extension, rootDirectory);
        foreach (string file in files) {
            Console.WriteLine (file);
        }
    }

    /// <summary>
    /// This function calls itself recursively for each of the subdirectories that it finds
    /// in the root directory passed to it. It returns files of the extension as specified
    /// by the caller.
    /// </summary>
    /// <param name="rootDirectory">The directory from which the file list is sought.</param>
    /// <param name="extension">The particular extension for which the file list is sought.</param>
    /// <returns>A list of all the files with extension as specified by the caller. This list
    /// includes the files in the current directory as well its sub-directories.</returns>
    static List<string> GetFilesRecursively (string rootDirectory, string extension) {
        // Uncomment this line only if you want to trace the control as it goes from
        // sub-directory to sub-directory. Be ready for long scrolls of text output:
        //Console.WriteLine ("Currently in directory {0}", rootDirectory);

        // Create an output list:
        List<string> opList = new List<string> ();

        // Get all files in the current directory:
        string[] allFiles = Directory.GetFiles (rootDirectory, "*." + extension);

        // Add these files to the output list:
        opList.AddRange (allFiles);

        // Get all sub-directories in current directory:
        string[] subDirectories = Directory.GetDirectories (rootDirectory);

        // And iterate through them:
        foreach (string subDir in subDirectories) {
            // Get all the files from the sub-directory:
            List<string> subDirFileList = GetFilesRecursively (subDir, extension);
            // And add it to this list:
            opList.AddRange (subDirFileList);
        }

        // Finally return the output list:
        return opList;
    }

Answer 1

您可以使用FileInfo类获得其中的大多数..。

var info = new System.IO.FileInfo(@"c:\folder\file.ext");

它具有Length、CreationTime、LastAccessTime和LastWriteTime的属性，要将它们输出(例如)到控制台，您可以.

Console.WriteLine("For file {0}", info.Name);
Console.WriteLine("Length is {0}", info.Length);
Console.WriteLine("Creation time is {0}", info.CreationTime);
Console.WriteLine("Last access time is {0}", info.LastAccessTime);
Console.WriteLine("Last write time is {0}", info.LastWriteTime);

要获得完整的文件名，可以使用GetFileNameWithoutExtension。

var fileName = System.IO.Path.GetFileNameWithoutExtension(@"c:\folder\file.ext")

在上面的示例中，filename将等于"file"。

获取文件扩展名的描述需要更多的工作，但可以使用SHGetFIleInfo完成，有关详细信息，请参阅this answer。

要将此与当前代码集成(如果您不太担心文件描述)，可以更改GetFilesRecursively方法以返回List<FileInfo>.

static List<FileInfo> GetFilesRecursively (string rootDirectory, string extension)

相应地更新您的opList变量。

List<FileInfo> opList = new List<FileInfo> ();

然后调整AddRange调用以添加FileInfo对象..。

opList.AddRange (allFiles.Select(f => new FileInfo(f)));

最后，还需要更改subDirFileList的类型，因此需要更改List<FileInfo>。

(我想这就是一切！)

Answer 2

对于后人，完整的答案如下。如果你要投票支持理查德的答案，请只投的票。谢谢!

    private void GetMyFiles () {
        string rootDirectory = @"" + txtPathToScan.Text + "";
        string extension = "*";

        List<FileInfo> files = GetFilesRecursively (rootDirectory, extension);

        Console.WriteLine ("Got {0} files of extension {1} in directory {2}", files.Count, extension, rootDirectory);
        foreach (FileInfo file in files)
        {
            Console.WriteLine(file);
            var info = new System.IO.FileInfo(@"" + file + "");

            Console.WriteLine("For file {0}", info.Name);
            Console.WriteLine("Length is {0} KB", info.Length/1024);
            Console.WriteLine("Creation time is {0}", info.CreationTime);
            Console.WriteLine("Last access time is {0}", info.LastAccessTime);
            Console.WriteLine("Last write time is {0}", info.LastWriteTime);

        }
    }

    /// <summary>
    /// This function calls itself recursively for each of the subdirectories that it finds
    /// in the root directory passed to it. It returns files of the extension as specified
    /// by the caller.
    /// </summary>
    /// <param name="rootDirectory">The directory from which the file list is sought.</param>
    /// <param name="extension">The particular extension for which the file list is sought.</param>
    /// <returns>A list of all the files with extension as specified by the caller. This list
    /// includes the files in the current directory as well its sub-directories.</returns>
    static List<FileInfo> GetFilesRecursively(string rootDirectory, string extension)
    {
        // Uncomment this line only if you want to trace the control as it goes from
        // sub-directory to sub-directory. Be ready for long scrolls of text output:
        //Console.WriteLine ("Currently in directory {0}", rootDirectory);

        // Create an output list:
        List<FileInfo> opList = new List<FileInfo>();

        // Get all files in the current directory:
        string[] allFiles = Directory.GetFiles (rootDirectory, "*." + extension);

        // Add these files to the output list:
        opList.AddRange(allFiles.Select(f => new FileInfo(f)));

        // Get all sub-directories in current directory:
        string[] subDirectories = Directory.GetDirectories (rootDirectory);

        // And iterate through them:
        foreach (string subDir in subDirectories) {
            // Get all the files from the sub-directory:
            List<FileInfo> subDirFileList = GetFilesRecursively (subDir, extension);
            // And add it to this list:
            opList.AddRange (subDirFileList);
        }

        // Finally return the output list:
        return opList;
    }