我编写了代码来递归删除文件夹及其所有结构。我从 获得了System.IO.DirectoryNotFoundException一个File.Delete有效的文件名Directory.GetFiles(path)。我File.Exists之前添加过，它告诉我该文件不存在，我也可以在资源管理器中看到它。我知道我可以做到，SHFileOperation应该可以正常工作。但我想使用本机 C#（没有直接的 Windows API）。我在 Windows 10 上红色：.NET 4.6.2 和长路径，并在本地组策略编辑器中设置启用“启用 Win 32 长路径”。我正在使用 .NET Framework 4.7.2。有谁能告诉我我的代码有什么问题吗？或者我能做些什么来让它发挥作用？错误的路径是：'E:\CobianBackupOld\cn1629\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\AppIconCache\100\{7C5A40EF-A0FB-4BFC-874A-C0F2E0B9FA8E}_Microsoft Visual Studio 9_0_Application_PreEmptive Solutions_Dotfuscator Community Edition_dotfuscator _exe'我是该文件的所有者（我有权限删除它）。
1 回答
猛跑小猪
TA贡献1858条经验 获得超8个赞
虽然没有我希望的那么完美，但我通过使用前缀“\?\”并确保在删除之前将属性设置为正常来修复了我的错误。
我还是不明白为什么我还必须这样做？？？为什么它在最近的.net库中仍然没有修复？
最终代码：
using System;
using System.Diagnostics;
using System.IO;
namespace HQ.Util.General.IO
{
public class DirectoryRemoverRecursive
{
private readonly Action<string, string, int> _pathStatus;
private readonly Func<string, bool> _callbackCanRemoveFile;
private readonly Func<string, bool> _callbackCanRemoveFolder;
private Func<bool> _shouldCancel;
public int Count { get; private set; } = 0;
/// <summary>
///
/// </summary>
/// <param name="pathStatus">Arguments are [path] and [null on success or exception message]</param>
/// <param name="callbackCanRemoveFile">Argument is path and should return true to delete. If this function is null, all path will be deleted.</param>
/// <param name="callbackCanRemoveFolder">Argument is path and should return true to delete. If this function is null, all path will be deleted.</param>
/// <param name="shouldCancel">If null will never cancel. Cancel when func return true</param>
public DirectoryRemoverRecursive(
Action<string, string, int> pathStatus = null,
Func<string, bool> callbackCanRemoveFile = null,
Func<string, bool> callbackCanRemoveFolder = null,
Func<bool> shouldCancel = null)
{
_pathStatus = pathStatus;
_callbackCanRemoveFile = callbackCanRemoveFile;
_callbackCanRemoveFolder = callbackCanRemoveFolder;
_shouldCancel = shouldCancel;
}
// ******************************************************************
/// <summary>
/// return true if canceled
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public bool Remove(string path)
{
string result = null;
if (path.Length < 2 || !path.StartsWith(@"\\"))
{
path = @"\\?\" + path;
}
if (Directory.Exists(path))
{
foreach (var subDir in Directory.GetDirectories(path))
{
if (_shouldCancel != null)
{
if (_shouldCancel())
{
return true;
}
}
if (Remove(subDir))
{
return true;
}
}
foreach (var filename in Directory.GetFiles(path))
{
if (_shouldCancel != null)
{
if (_shouldCancel())
{
return true;
}
}
if (Remove(filename))
{
return true;
}
}
try
{
if (_callbackCanRemoveFolder != null)
{
if (!_callbackCanRemoveFolder(path))
{
return false;
}
}
Directory.Delete(path);
Count++;
result = null;
}
catch (Exception ex)
{
try
{
File.SetAttributes(path, FileAttributes.Normal);
Directory.Delete(path);
Count++;
result = null;
}
catch (Exception)
{
result = "Try to delete directory exception: " + ex.ToString();
}
}
}
else
{
try
{
if (File.Exists(path))
{
if (_callbackCanRemoveFile != null)
{
if (!_callbackCanRemoveFile(path))
{
return false;
}
}
File.Delete(path);
Count++;
result = null;
}
else
{
Debug.Print($"File does not exists {path}");
}
}
catch (Exception ex)
{
try
{
File.SetAttributes(path, FileAttributes.Normal);
File.Delete(path);
Count++;
result = null;
}
catch (Exception)
{
result = "Try to delete file exception: " + ex.ToString();
}
}
}
_pathStatus?.Invoke(path, result, Count);
return false;
}
// ******************************************************************
}
}
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