如何刪除目錄中的所有文件和文件夾？

Question

使用 C#，如何刪除目錄中的所有文件和文件夾，但仍保留根目錄？

Answer 1

System.IO.DirectoryInfo di = new DirectoryInfo("YourPath");

foreach (FileInfo file in di.GetFiles())
{
    file.Delete(); 
}
foreach (DirectoryInfo dir in di.GetDirectories())
{
    dir.Delete(true); 
}

---

如果您的目錄可能有很多文件， EnumerateFiles()比GetFiles()更有效，因為當您使用EnumerateFiles()您可以在返回整個集合之前開始枚舉它，而不是GetFiles()需要加載在開始枚舉它之前，內存中的整個集合。 在這里看到這個報價：

因此，當您處理許多文件和目錄時，EnumerateFiles() 會更高效。

這同樣適用於EnumerateDirectories()和GetDirectories() 。 所以代碼將是：

foreach (FileInfo file in di.EnumerateFiles())
{
    file.Delete(); 
}
foreach (DirectoryInfo dir in di.EnumerateDirectories())
{
    dir.Delete(true); 
}

對於這個問題，真的沒有理由使用GetFiles()和GetDirectories() 。

Answer 2

是的，這是正確的做法。 如果您想給自己一個“Clean”（或者，我更喜歡稱之為“Empty”函數），您可以創建一個擴展方法。

public static void Empty(this System.IO.DirectoryInfo directory)
{
    foreach(System.IO.FileInfo file in directory.GetFiles()) file.Delete();
    foreach(System.IO.DirectoryInfo subDirectory in directory.GetDirectories()) subDirectory.Delete(true);
}

這將允許你做類似的事情..

System.IO.DirectoryInfo directory = new System.IO.DirectoryInfo(@"C:\...");

directory.Empty();

Answer 3

以下代碼將遞歸清除文件夾：

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();
    }
}

Answer 4

最簡單的方法：

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

請注意，這可能會清除文件夾的某些權限。

Answer 5

 new System.IO.DirectoryInfo(@"C:\Temp").Delete(true);

 //Or

 System.IO.Directory.Delete(@"C:\Temp", true);

Answer 6

我們也可以表達對LINQ 的熱愛：

using System.IO;
using System.Linq;
…
var directory = Directory.GetParent(TestContext.TestDir);

directory.EnumerateFiles()
    .ToList().ForEach(f => f.Delete());

directory.EnumerateDirectories()
    .ToList().ForEach(d => d.Delete(true));

請注意，我這里的解決方案不是高性能的，因為我使用的是Get*().ToList().ForEach(...)兩次生成相同的IEnumerable 。 我使用擴展方法來避免這個問題：

using System.IO;
using System.Linq;
…
var directory = Directory.GetParent(TestContext.TestDir);

directory.EnumerateFiles()
    .ForEachInEnumerable(f => f.Delete());

directory.EnumerateDirectories()
    .ForEachInEnumerable(d => d.Delete(true));

這是擴展方法：

/// <summary>
/// Extensions for <see cref="System.Collections.Generic.IEnumerable"/>.
/// </summary>
public static class IEnumerableOfTExtensions
{
    /// <summary>
    /// Performs the <see cref="System.Action"/>
    /// on each item in the enumerable object.
    /// </summary>
    /// <typeparam name="TEnumerable">The type of the enumerable.</typeparam>
    /// <param name="enumerable">The enumerable.</param>
    /// <param name="action">The action.</param>
    /// <remarks>
    /// “I am philosophically opposed to providing such a method, for two reasons.
    /// …The first reason is that doing so violates the functional programming principles
    /// that all the other sequence operators are based upon. Clearly the sole purpose of a call
    /// to this method is to cause side effects.”
    /// —Eric Lippert, “foreach” vs “ForEach” [http://blogs.msdn.com/b/ericlippert/archive/2009/05/18/foreach-vs-foreach.aspx]
    /// </remarks>
    public static void ForEachInEnumerable<TEnumerable>(this IEnumerable<TEnumerable> enumerable, Action<TEnumerable> action)
    {
        foreach (var item in enumerable)
        {
            action(item);
        }
    }
}

Answer 7

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

    foreach(FileInfo fi in dir.GetFiles())
    {
        try
        {
            fi.Delete();
        }
        catch(Exception) { } // Ignore all exceptions
    }

    foreach(DirectoryInfo di in dir.GetDirectories())
    {
        ClearFolder(di.FullName);
        try
        {
            di.Delete();
        }
        catch(Exception) { } // Ignore all exceptions
    }
}

如果您知道沒有子文件夾，這樣的操作可能是最簡單的：

    Array.ForEach(Directory.GetFiles(folderName), File.Delete);

Answer 8

System.IO.Directory.Delete(installPath, true);
System.IO.Directory.CreateDirectory(installPath);

Answer 9

我用了

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

刪除舊圖片，我不需要此文件夾中的任何對象

Answer 10

我嘗試過的每種方法都在某些時候因 System.IO 錯誤而失敗。 以下方法肯定有效，即使文件夾是否為空，只讀與否等。

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); 

Answer 11

這是我在閱讀所有帖子后結束的工具。 它確實

• 刪除所有可以刪除的
• 如果某些文件保留在文件夾中，則返回 false

它處理

• 只讀文件
• 刪除延遲
• 鎖定文件

它不使用 Directory.Delete，因為進程在異常時中止。

    /// <summary>
    /// Attempt to empty the folder. Return false if it fails (locked files...).
    /// </summary>
    /// <param name="pathName"></param>
    /// <returns>true on success</returns>
    public static bool EmptyFolder(string pathName)
    {
        bool errors = false;
        DirectoryInfo dir = new DirectoryInfo(pathName);

        foreach (FileInfo fi in dir.EnumerateFiles())
        {
            try
            {
                fi.IsReadOnly = false;
                fi.Delete();

                //Wait for the item to disapear (avoid 'dir not empty' error).
                while (fi.Exists)
                {
                    System.Threading.Thread.Sleep(10);
                    fi.Refresh();
                }
            }
            catch (IOException e)
            {
                Debug.WriteLine(e.Message);
                errors = true;
            }
        }

        foreach (DirectoryInfo di in dir.EnumerateDirectories())
        {
            try
            {
                EmptyFolder(di.FullName);
                di.Delete();

                //Wait for the item to disapear (avoid 'dir not empty' error).
                while (di.Exists)
                {
                    System.Threading.Thread.Sleep(10);
                    di.Refresh();
                }
            }
            catch (IOException e)
            {
                Debug.WriteLine(e.Message);
                errors = true;
            }
        }

        return !errors;
    }

Answer 12

以下代碼將清理目錄，但將根目錄保留在那里（遞歸）。

Action<string> DelPath = null;
DelPath = p =>
{
    Directory.EnumerateFiles(p).ToList().ForEach(File.Delete);
    Directory.EnumerateDirectories(p).ToList().ForEach(DelPath);
    Directory.EnumerateDirectories(p).ToList().ForEach(Directory.Delete);
};
DelPath(path);

Answer 13

僅對 File 和 Directory 使用靜態方法而不是 FileInfo 和 DirectoryInfo 會執行得更快。 （請參閱C# 中 File 和 FileInfo 之間的區別是什么？ ）中接受的答案。 答案顯示為實用方法。

public static void Empty(string directory)
{
    foreach(string fileToDelete in System.IO.Directory.GetFiles(directory))
    {
        System.IO.File.Delete(fileToDelete);
    }
    foreach(string subDirectoryToDeleteToDelete in System.IO.Directory.GetDirectories(directory))
    {
        System.IO.Directory.Delete(subDirectoryToDeleteToDelete, true);
    }
}

Answer 14

string directoryPath = "C:\Temp";
Directory.GetFiles(directoryPath).ToList().ForEach(File.Delete);
Directory.GetDirectories(directoryPath).ToList().ForEach(Directory.Delete);

Answer 15

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

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

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

Answer 16

在 Windows 7 中，如果您剛剛使用 Windows 資源管理器手動創建它，則目錄結構與此類似：

C:
  \AAA
    \BBB
      \CCC
        \DDD

並運行原始問題中建議的代碼來清理目錄 C:\\AAA，當嘗試刪除 BBB 時， di.Delete(true)始終失敗並顯示 IOException“目錄不為空”。 這可能是因為 Windows 資源管理器中的某種延遲/緩存。

以下代碼對我來說可靠：

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);
    }
}

Answer 17

該版本不使用遞歸調用，解決了只讀問題。

public static void EmptyDirectory(string directory)
{
    // First delete all the files, making sure they are not readonly
    var stackA = new Stack<DirectoryInfo>();
    stackA.Push(new DirectoryInfo(directory));

    var stackB = new Stack<DirectoryInfo>();
    while (stackA.Any())
    {
        var dir = stackA.Pop();
        foreach (var file in dir.GetFiles())
        {
            file.IsReadOnly = false;
            file.Delete();
        }
        foreach (var subDir in dir.GetDirectories())
        {
            stackA.Push(subDir);
            stackB.Push(subDir);
        }
    }

    // Then delete the sub directories depth first
    while (stackB.Any())
    {
        stackB.Pop().Delete();
    }
}

Answer 18

下面的例子展示了如何做到這一點。 它首先創建一些目錄和一個文件，然后通過Directory.Delete(topPath, true);刪除它們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 。

Answer 19

使用 DirectoryInfo 的 GetDirectories 方法。

foreach (DirectoryInfo subDir in new DirectoryInfo(targetDir).GetDirectories())
                    subDir.Delete(true);

Answer 20

這不是處理上述問題的最佳方法。 但這是另一種選擇......

while (Directory.GetDirectories(dirpath).Length > 0)
 {
       //Delete all files in directory
       while (Directory.GetFiles(Directory.GetDirectories(dirpath)[0]).Length > 0)
       {
            File.Delete(Directory.GetFiles(dirpath)[0]);
       }
       Directory.Delete(Directory.GetDirectories(dirpath)[0]);
 }

Answer 21

我知道這是一個古老的問題，但這是（可能是新的）正確答案：

新目錄信息（文件夾）。刪除（真）；

Answer 22

 foreach (string file in System.IO.Directory.GetFiles(path))
 {
    System.IO.File.Delete(file);
 }

 foreach (string subDirectory in System.IO.Directory.GetDirectories(path))
 {
     System.IO.Directory.Delete(subDirectory,true); 
 } 

Answer 23

DirectoryInfo Folder = new DirectoryInfo(Server.MapPath(path)); 
if (Folder .Exists)
{
    foreach (FileInfo fl in Folder .GetFiles())
    {
        fl.Delete();
    }

    Folder .Delete();
}

Answer 24

using System;
using System.IO;
namespace DeleteFoldersAndFilesInDirectory
{
     class Program
     {
          public static void DeleteAll(string path)
          {
               string[] directories = Directory.GetDirectories(path);
               string[] files = Directory.GetFiles(path);
               foreach (string x in directories)
                    Directory.Delete(x, true);
               foreach (string x in files)
                    File.Delete(x);
          }
          static void Main()
          {
               Console.WriteLine("Enter The Directory:");
               string directory = Console.ReadLine();
               Console.WriteLine("Deleting all files and directories ...");
               DeleteAll(directory);
               Console.WriteLine("Deleted");
          }
     }
}

Answer 25

要刪除文件夾，這是使用文本框的代碼和using System.IO;的按鈕using System.IO; ：

private void Deletebt_Click(object sender, EventArgs e)
{
    System.IO.DirectoryInfo myDirInfo = new DirectoryInfo(@"" + delete.Text);

    foreach (FileInfo file in myDirInfo.GetFiles())
    {
       file.Delete();
    }
    foreach (DirectoryInfo dir in myDirInfo.GetDirectories())
    {
       dir.Delete(true);
    }
}

Answer 26

using System.IO;

string[] filePaths = Directory.GetFiles(@"c:\MyDir\");

foreach (string filePath in filePaths)

File.Delete(filePath);

Answer 27

從主調用

static void Main(string[] args)
{ 
   string Filepathe =<Your path>
   DeleteDirectory(System.IO.Directory.GetParent(Filepathe).FullName);              
}

添加這個方法

public static void DeleteDirectory(string path)
{
    if (Directory.Exists(path))
    {
        //Delete all files from the Directory
        foreach (string file in Directory.GetFiles(path))
        {
            File.Delete(file);
        }
        //Delete all child Directories
        foreach (string directory in Directory.GetDirectories(path))
        {
             DeleteDirectory(directory);
        }
        //Delete a Directory
        Directory.Delete(path);
    }
 }

Answer 28

DirectoryInfo.GetFileSystemInfos 返回文件和目錄：-

new DirectoryInfo(targetDir).GetFileSystemInfos().ToList().ForEach(x => x.Delete());

或者如果你想遞歸刪除： -

        new DirectoryInfo(targetDir).GetFileSystemInfos().ToList().ForEach(x =>
        {
            if (x is DirectoryInfo di)
                di.Delete(true);
            else
                x.Delete();
        });

Answer 29

這將顯示我們如何刪除文件夾並檢查它我們使用文本框

using System.IO;
namespace delete_the_folder
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Deletebt_Click(object sender, EventArgs e)
    {
        //the  first you should write the folder place
        if (Pathfolder.Text=="")
        {
            MessageBox.Show("ples write the path of the folder");
            Pathfolder.Select();
            //return;
        }

        FileAttributes attr = File.GetAttributes(@Pathfolder.Text);

        if (attr.HasFlag(FileAttributes.Directory))
            MessageBox.Show("Its a directory");
        else
            MessageBox.Show("Its a file");

        string path = Pathfolder.Text;
        FileInfo myfileinf = new FileInfo(path);
        myfileinf.Delete();

    }


}

}

Answer 30

private void ClearDirectory(string path)
{
    if (Directory.Exists(path))//if folder exists
    {
        Directory.Delete(path, true);//recursive delete (all subdirs, files)
    }
    Directory.CreateDirectory(path);//creates empty directory
}

Answer 31

您唯一應該做的就是將optional recursive parameter設置為True 。

Directory.Delete("C:\\MyDummyDirectory", True)

感謝 .NET。 :)

Answer 32

IO.Directory.Delete(HttpContext.Current.Server.MapPath(path), True)

你不需要更多