c# - `FileNotFoundException` for network-shared files that do exist. What am I missing? -


i need default file icon shared file. faced problems , found the question "how associated icon network share file".

but have problem shared files, looks if did not exist. here code:

public static icon extractassociatedicon(string filepath) {     int index = 0;      uri uri;     if (filepath == null)     {         throw new argumentexception(string.format("'{0}' not valid '{1}'", "null", "filepath"), "filepath");     }     try     {         uri = new uri(filepath);     }     catch (uriformatexception)     {         filepath = path.getfullpath(filepath);         uri = new uri(filepath);     }     if (uri.isfile)     {         if (!file.exists(filepath))         {             throw new filenotfoundexception(filepath);         }          stringbuilder iconpath = new stringbuilder(260);         iconpath.append(filepath);          intptr handle = safenativemethods.extractassociatedicon(new handleref(null, intptr.zero), iconpath, ref index);         if (handle != intptr.zero)         {             return icon.fromhandle(handle);         }     }     return null; }

i filenotfoundexception , don't why. filepath ok, , can access these files through explorer. tried create fileinfo instance filepath (i read somewhere may help) still nothing.

what i'm missing?

iirc, file.exists , directory.exists have problems resolving drive letters mapped network share. might not see these drives, report false though path points valid file.

if use unc paths (\\server\share\file.name) instead of drive letters, might work, resolve drive-letter-bassed file path unc path first , pass latter file.exists. see e.g. this answer that question example how this.


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