从Windows 10。可以通过修改注册表项来消除限制。

Tip Starting in Windows 10, version 1607, MAX_PATH limitations have been removed from common Win32 file and directory functions. However, you must opt-in to the new behavior. A registry key allows you to enable or disable the new long path behavior. To enable long path behavior set the registry key at HKLM\SYSTEM\CurrentControlSet\Control\FileSystem LongPathsEnabled (Type: REG_DWORD). The key's value will be cached by the system (per process) after the first call to an affected Win32 file or directory function (list follows). The registry key will not be reloaded during the lifetime of the process. In order for all apps on the system to recognize the value of the key, a reboot might be required because some processes may have started before the key was set. The registry key can also be controlled via Group Policy at Computer Configuration > Administrative Templates > System > Filesystem > Enable NTFS long paths. You can also enable the new long path behavior per app via the manifest: <application xmlns="urn:schemas-microsoft-com:asm.v3"> <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings"> <ws2:longPathAware>true</ws2:longPathAware> </windowsSettings> </application>

您可以使用PowerShell启用长路径名:

Set-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem' -Name LongPathsEnabled -Type DWord -Value 1 

另一个版本是在计算机配置/管理模板/系统/文件系统中使用组策略:

您可以将文件夹作为驱动器挂载。从命令行，如果你有一个路径C:\path\to\long\文件夹，你可以将它映射到驱动器号X:使用:

subst x: \path\to\long\folder

这并不是严格意义上的，因为NTFS文件系统支持最多32k个字符的路径。你可以使用win32 api和“\\?”使用大于260个字符作为路径前缀。

. net BCL团队博客中关于漫长路径的详细解释。 一个小节选强调了长路径的问题

Another concern is inconsistent behavior that would result by exposing long path support. Long paths with the \\?\ prefix can be used in most of the file-related Windows APIs, but not all Windows APIs. For example, LoadLibrary, which maps a module into the address of the calling process, fails if the file name is longer than MAX_PATH. So this means MoveFile will let you move a DLL to a location such that its path is longer than 260 characters, but when you try to load the DLL, it would fail. There are similar examples throughout the Windows APIs; some workarounds exist, but they are on a case-by-case basis.

处理路径限制的一种方法是使用符号链接缩短路径条目。

例如:

创建一个C:\p目录，将短链接保存到长路径 mklink /J C:\p\foo C:\一些\疯狂\长\路径\foo 将C:\p\foo添加到您的路径中，而不是长路径

从Windows 10。可以通过修改注册表项来消除限制。

Tip Starting in Windows 10, version 1607, MAX_PATH limitations have been removed from common Win32 file and directory functions. However, you must opt-in to the new behavior. A registry key allows you to enable or disable the new long path behavior. To enable long path behavior set the registry key at HKLM\SYSTEM\CurrentControlSet\Control\FileSystem LongPathsEnabled (Type: REG_DWORD). The key's value will be cached by the system (per process) after the first call to an affected Win32 file or directory function (list follows). The registry key will not be reloaded during the lifetime of the process. In order for all apps on the system to recognize the value of the key, a reboot might be required because some processes may have started before the key was set. The registry key can also be controlled via Group Policy at Computer Configuration > Administrative Templates > System > Filesystem > Enable NTFS long paths. You can also enable the new long path behavior per app via the manifest: <application xmlns="urn:schemas-microsoft-com:asm.v3"> <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings"> <ws2:longPathAware>true</ws2:longPathAware> </windowsSettings> </application>