c# - Why when uploading file format 20%.jpg i'm getting exception? -

the reason % if i'm uploading 20 files , jpg no problems if 1 of files names example 20%.jpg or 50%.jpg can't upload them.

i can edit , see images on hard disk can't upload them.

now example test in files index 0 have: d:\5%.jpg txf , fn both contain: d:\5%.jpg

this top part of method upload files ftp server:

the exception happen when i'm calling method createdirectory in method.

private void stringarrayuploadfiles(object sender, doworkeventargs e)         {             try             {                 foreach (string txf in files)                 {                     string fn = txf;                     backgroundworker bw = sender backgroundworker;                     fileinfo fileinfo = new fileinfo(txf);                     f.targetfolder = fileinfo.directoryname;                     f.targetfolder = path.getdirectoryname(txf);                     f.targetfolder = path.getfullpath(txf).replace(":", "").replace("\\", "/");                     string filenameonly = path.getfilename(f.targetfolder);                     int index = txf.indexof(filenameonly);                     string left = txf.substring(0, index);                     f.targetfolder = path.getfullpath(left).replace(":", "").replace("\\", "");                     createdirectory(f.targetfolder); 

the variable f ftpsettings:

public class ftpsettings     {         public string host, username, password, targetfolder, sourcefile;         public bool passive;         public int port = 21;     } 

files string[]

the exception happen when i'm trying create directory file on ftp server. that's in method createdirectory i'm calling download method:

createdirectory(f.targetfolder); 

this createdirectory method:

public void createdirectory(string newdirectory)         {             try             {                 string ftphost = f.host + "/" + newdirectory;                 if (!ftphost.tolower().startswith("ftp://"))                     ftphost = "ftp://" + ftphost;                 ftprequest = (ftpwebrequest)webrequest.create(ftphost);                 ftprequest.credentials = new networkcredential(f.username, f.password);                 ftprequest.usebinary = true;                 ftprequest.usepassive = true;                 ftprequest.keepalive = true;                 ftprequest.method = webrequestmethods.ftp.makedirectory;                 ftpresponse1 = (ftpwebresponse)ftprequest.getresponse();                 ftpresponse1.close();                 ftprequest = null;             }             catch (exception ex) { console.writeline(ex.tostring()); }             return;         } 

in variable newdirectory have: d that's fine i'm not sure % or why % make problem.

the exception heppen inside createdirectory method on line:

ftpresponse1 = (ftpwebresponse)ftprequest.getresponse();  system.net.webexception caught   hresult=-2146233079   message=the remote server returned error: (550) file unavailable (e.g., file not found, no access).   source=system   stacktrace:        @ system.net.ftpwebrequest.checkerror()        @ system.net.ftpwebrequest.syncrequestcallback(object obj)        @ system.io.stream.close()        @ system.net.connectionpool.destroy(pooledstream pooledstream)        @ system.net.connectionpool.putconnection(pooledstream pooledstream, object owningobject, int32 creationtimeout, boolean canreuse)        @ system.net.ftpwebrequest.finishrequeststage(requeststage stage)        @ system.net.ftpwebrequest.getresponse()        @ ftp_progressbar.ftpprogress.createdirectory(string newdirectory) in c:\ftp_progressbar\ftp_progressbar\ftpprogress.cs:line 270   innerexception: 

line 270 is:

ftpresponse1 = (ftpwebresponse)ftprequest.getresponse(); 

maybe in ftp uri special characters 20% or other? try use httputility.urldecode , httputility.urlencode