使用C#,如何删除目录中的所有文件和文件夹,但仍然保留根目录?


当前回答

下面的示例显示了如何做到这一点。它首先创建一些目录和文件,然后通过Directory.Delete(topPath,true);:

    static void Main(string[] args)
    {
        string topPath = @"C:\NewDirectory";
        string subPath = @"C:\NewDirectory\NewSubDirectory";

        try
        {
            Directory.CreateDirectory(subPath);

            using (StreamWriter writer = File.CreateText(subPath + @"\example.txt"))
            {
                writer.WriteLine("content added");
            }

            Directory.Delete(topPath, true);

            bool directoryExists = Directory.Exists(topPath);

            Console.WriteLine("top-level directory exists: " + directoryExists);
        }
        catch (Exception e)
        {
            Console.WriteLine("The process failed: {0}", e.Message);
        }
    }

它取自https://msdn.microsoft.com/en-us/library/fxeahc5f(v=vs.110).aspx。

其他回答

以下代码将递归清除文件夹:

private void clearFolder(string FolderName)
{
    DirectoryInfo dir = new DirectoryInfo(FolderName);

    foreach(FileInfo fi in dir.GetFiles())
    {
        fi.Delete();
    }

    foreach (DirectoryInfo di in dir.GetDirectories())
    {
        clearFolder(di.FullName);
        di.Delete();
    }
}

我尝试过的每一个方法都会在某个时候失败,并出现System.IO错误。即使文件夹为空或非空、只读或非只读等,以下方法也能正常工作。

ProcessStartInfo Info = new ProcessStartInfo();  
Info.Arguments = "/C rd /s /q \"C:\\MyFolder"";  
Info.WindowStyle = ProcessWindowStyle.Hidden;  
Info.CreateNoWindow = true;  
Info.FileName = "cmd.exe";  
Process.Start(Info); 

在Windows 7中,如果您刚刚使用Windows资源管理器手动创建了它,则目录结构与以下类似:

C:
  \AAA
    \BBB
      \CCC
        \DDD

运行原始问题中建议的代码来清理目录C:\AAA,当尝试删除BBB时,行di.Delete(true)总是失败,并出现IOException“目录不是空的”。这可能是由于Windows资源管理器中的某种延迟/缓存。

以下代码对我来说工作可靠:

static void Main(string[] args)
{
    DirectoryInfo di = new DirectoryInfo(@"c:\aaa");
    CleanDirectory(di);
}

private static void CleanDirectory(DirectoryInfo di)
{
    if (di == null)
        return;

    foreach (FileSystemInfo fsEntry in di.GetFileSystemInfos())
    {
        CleanDirectory(fsEntry as DirectoryInfo);
        fsEntry.Delete();
    }
    WaitForDirectoryToBecomeEmpty(di);
}

private static void WaitForDirectoryToBecomeEmpty(DirectoryInfo di)
{
    for (int i = 0; i < 5; i++)
    {
        if (di.GetFileSystemInfos().Length == 0)
            return;
        Console.WriteLine(di.FullName + i);
        Thread.Sleep(50 * i);
    }
}

我用过

Directory.GetFiles(picturePath).ToList().ForEach(File.Delete);

删除旧图片,我不需要此文件夹中的任何对象

最简单的方法:

Directory.Delete(path,true);  
Directory.CreateDirectory(path);

请注意,这可能会删除文件夹上的某些权限。