byte - Character Limit in filepath C# -


i have following piece of code uploads file , checks validity. first issue:

if (radupload1.uploadedfiles.count == 0) {     session[appconstants.error_message] = errorslist.geterrormessage(         errorslist.err_p_date_file_valid); } else {     if (radupload1.uploadedfiles.count > 0)     {         foreach (uploadedfile validfile in radupload1.uploadedfiles)         {             fileinfo fi = new fileinfo(validfile.filename);             stream fs = validfile.inputstream;              idbcontextualrecord pfile = statuscontext.createandaddrecordforinsert(partstoredfile.t_name);             pfile[partstoredfile.c_partid] = _part[part.c_id];             string targetfolder = appsession.current.configparameters[appconstants.upload_file_path] +                                   "\\partrec\\" + _part[part.c_id] + "\\" + pfile[partstoredfile.c_id];              long bytesonthestream = 0l;             try             {                 directoryinfo dir = new directoryinfo(targetfolder);                 if (dir.exists == false)                     dir.create();                  string fullfilename = path.combine(targetfolder, fi.name);                  stream targetstream = file.openwrite(fullfilename);                 byte[] buffer = new byte[appconstants.buff_size];                 int bytesread;                  // while read method returns bytes                 // keep writing them output stream                 while ((bytesread = fs.read(buffer, 0, appconstants.buff_size)) > 0)                 {                     targetstream.write(buffer, 0, bytesread);                     bytesonthestream += bytesread;                 }                  fs.close();                 targetstream.close();             }             catch (exception ex)             {                 throw ex;             }

what want check if number of characters in filepath name exceeds 260 display me message of error.

this second issue after modification made:

if (radupload1.uploadedfiles.count <= 0) {     session[appconstants.error_message] = errorslist.geterrormessage(                                   errorslist.err_p_date_file_valid); } else {     if (radupload1.uploadedfiles.count > 0 )     {         foreach (uploadedfile validfile in radupload1.uploadedfiles)         {             pomdoc = (idbcontextualrecord)session[appconstants.pom_document_new];              fileinfo fi = new fileinfo(validfile.filename);             stream fs = validfile.inputstream;              idbcontextualrecord pomfile = pomcontext.createandaddrecordforinsert(pomfile.t_name);             pomfile[pomfile.c_pomdocumentid] = pomdoc[pomdocument.c_id];             string targetfolder = appsession.current.configparameters[appconstants.upload_file_path] + "\\pom\\" + pomdoc[pomdocument.c_id] + "\\" + pomfile[pomfile.c_id];              long bytesonthestream = 0l;             try             {                 directoryinfo dir = new directoryinfo(targetfolder);                 if (dir.exists == false)                     dir.create();                  string fullfilename = path.combine(targetfolder, fi.name);                  if (fullfilename.length > 260)                 {                     throw new exception(string.format("the filename long!",fullfilename));                 }                 stream targetstream = file.openwrite(fullfilename);                 byte[] buffer = new byte[appconstants.buff_size];                 int bytesread;                  // while read method returns bytes                 // keep writing them output stream                 while ((bytesread = fs.read(buffer, 0, appconstants.buff_size)) > 0)                 {                     targetstream.write(buffer, 0, bytesread);                     bytesonthestream += bytesread;                 }                  fs.close();                 targetstream.close();             }             catch (exception ex)             {                 throw ;             }

you have compare fullfilename.lenght 260 , raise exception if needed:

if (radupload1.uploadedfiles.count <= 0) // changed condition remove check within else block {     session[appconstants.error_message] = errorslist.geterrormessage(         errorslist.err_p_date_file_valid); } else {     foreach (uploadedfile validfile in radupload1.uploadedfiles)     {         fileinfo fi = new fileinfo(validfile.filename);         stream fs = validfile.inputstream;          idbcontextualrecord pfile = statuscontext.createandaddrecordforinsert(partstoredfile.t_name);         pfile[partstoredfile.c_partid] = _part[part.c_id];         string targetfolder = appsession.current.configparameters[appconstants.upload_file_path] +                               "\\partrec\\" + _part[part.c_id] + "\\" + pfile[partstoredfile.c_id];          long bytesonthestream = 0l;         try         {             directoryinfo dir = new directoryinfo(targetfolder);             if (dir.exists == false)                 dir.create();              string fullfilename = path.combine(targetfolder, fi.name);              if(fullfilename.length > 260)             {                 throw new exception(string.format("the filename {0} long.", fullfilename));                 // or whatever want             }              stream targetstream = file.openwrite(fullfilename);             byte[] buffer = new byte[appconstants.buff_size];             int bytesread;              // while read method returns bytes             // keep writing them output stream             while ((bytesread = fs.read(buffer, 0, appconstants.buff_size)) > 0)             {                 targetstream.write(buffer, 0, bytesread);                 bytesonthestream += bytesread;             }              fs.close();             targetstream.close();         }         catch (exception ex)         {             throw;         }

also, don't want throw ex; rather throw; or reset stacktrace, see is there difference between "throw" , "throw ex"?


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