C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
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Long path support with file system watcher
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Jalps
1
Reputation point
In our client application implemented in C# with .Net framework 4.8 (OS: Windows 10), we are using file system watcher control to detect folder's events. To support a long path we have tried with \?\ in folder path. When we create a new file in long path, file system watcher detects "Created" event and it returns correct format of full path. However when we delete the file from long path, watcher control's "Deleted" event fires but it returns the full path having ~ tilde in folder's names and in file name. e.g \?\C:\abc\FIRSTF~1\SECOND~1\THIRDF~1\FOURTH~1\FIFTHF~1....\AVIA~1.jpg
We have tried below win32 method to get correct full path, however its not returning full path, [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)] private static extern Int32 GetLongPathName(String shortPath, StringBuilder longPath, Int32 longPathLength);
Can anybody please suggest is there any upgrade version of file system watcher control to support long path or any other alternatives to get correct long path on file's delete or rename event? Any help would be appreciated.
C#
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Viorel 112.4K Reputation points2022-02-21T16:47:55.903+00:00 The GetLongPathName function seems to work if the path starts with "\?\" or the prefix is removed. Maybe you are using the function incorrectly.
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Sharjeel Ahmed 5 Reputation points2024-04-19T06:33:42.9+00:00 Hi,
We're using a console application with .Net framework 4.8. The network path works well with the long path prefix and receives events. However, when we add watcher on local folders with long path prefixes, an error throws with the message The given path's format is not supported. This has been tested with and without long path folders, with the same result in both cases.**
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To support a long path, we use prefixes such as\\?\for local folders and\\?\UNC\for network paths. EnableRaisingEvents property is set to true.However, file system watcher works with .Net framework 6.0 and has no errors and we can receive the events.
FileSystemWatcher.png
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