c# - !File.Exists is not working as expected for filenames containing UTF-8 characters -


my console application (c#) working filenames don't contain utf-8 characters when filenames contain utf-8 character, condition if(!file.exists(destfilepath)) not working expected.

i need delete files present in destination not in source. when there special characters in file name, example,

file

c:\a00000001\20162350775-Étienne geoffroy saint-hilaire, 1772-1844 visionary naturalist. hervé le guyader.pdf

destfilepath

d:\a00000001\20162350775-Étienne geoffroy saint-hilaire, 1772-1844 visionary naturalist. hervé le guyader.pdf

the filename in above case should not deleted both source , destination have same filename did. normal filenames, there no issue. code sample below:

public void synchronizesourceanddestination(string dir)         {             foreach (string file in directory.getfiles(dir))             {                 string destfilepath = file.replace(backupdirectory, lookupdirectory);                  if (!file.exists(destfilepath))                 {                     // delete file backup                     file.delete(file);                 }             }              foreach (string directory in directory.getdirectories(dir))             {                 string destinationdirectory = directory.replace(backupdirectory, lookupdirectory);                  if (!directory.exists(destinationdirectory))                 {                     directory.delete(directory, true);                     continue;                 }                 synchronizesourceanddestination(directory);             }         }

note: asp.net web application has setting globalization culture="en-us" uiculture="en-us" requestencoding="utf-8" responseencoding="utf-8" fileencoding="utf-8" in web.config file. above code c# console application process files saved web application. there no issue filenames in local machine when code in server, not working.

it has length of filepath (>260 characters) file.exists work utf-8 characters.

i've tested couple of minutes ago csi.exe, output:

c:\temp>csi microsoft (r) visual c# interactive compiler version 2.2.0.61624 copyright (c) microsoft corporation. rights reserved.  type "#help" more information. > system.io.file.exists("c:\\a00000001\\20162350775-Étienne geoffroy saint-hilai re, 1772-1844 visionary naturalist. hervé le guyader.pdf") true >

as can see, result true. i've tested on windows 10 machine, dutch language , have vs2017.2 installed.

--edit-- complete comment below, i've created console app test.

using system.io;  namespace consoleapp1 {     class program     {         private const string backupdirectory = "c:\\a00000001\\";         private const string lookupdirectory = "c:\\a00000002\\";         static void main(string[] args)         {             synchronizesourceanddestination("c:\\a00000001\\");         }          public static void synchronizesourceanddestination(string dir)         {             foreach (string file in directory.getfiles(dir))             {                 string destfilepath = file.replace(backupdirectory, lookupdirectory);                  if (!file.exists(destfilepath))                 {                     // delete file backup                     file.delete(file);                 }             }              foreach (string directory in directory.getdirectories(dir))             {                 string destinationdirectory = directory.replace(backupdirectory, lookupdirectory);                  if (!directory.exists(destinationdirectory))                 {                     directory.delete(directory, true);                     continue;                 }                 synchronizesourceanddestination(directory);             }         }     } }

make sure folders a00000001 , a00000002 present on system , place file inside both of them same name , utf-8 characters (20162350775-Étienne geoffroy saint-hilaire, 1772-1844 visionary naturalist. hervé le guyader.pdf).

in case, no file got deleted because of file.exists check.


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