box api - upload file in box using box api 2.0 with ASp.net (4.0), c# -

hi want upload file in box using box api 2.0 asp.net (4.0), c#. getting 400 (bad request error).

following code.

`public bool upload(byte[] filebytes, string folderid, string filename) { uploadfilebytes = filebytes; uploadfilename = filename;

    uploadsplitfile(folderid);     return true;  }   public void uploadsplitfile(string folderid) {     string filename = uploadfilename;     byte[] buffer;     using (memorystream resultstream = new memorystream())     {         buffer = assemblefilesblock();         resultstream.write(buffer, 0, buffer.length);         buffer = getformattedboundary(true);         resultstream.write(buffer, 0, buffer.length);         resultstream.flush();         buffer = resultstream.toarray();     }     httpwebrequest myrequest = createrequest(buffer.length, folderid);     using (stream newstream = myrequest.getrequeststream())     {         newstream.write(buffer, 0, buffer.length);         newstream.close();     }     string response;      using (httpwebresponse myhttpwebresponse = (httpwebresponse)myrequest.getresponse())     {         using (stream responsestream = myhttpwebresponse.getresponsestream())         {             textreader reader = new streamreader(responsestream);              response = reader.readtoend();         }     } } private byte[] assemblefile() {     byte[] buffer;     using (memorystream resultstream = new memorystream())     {         buffer = encoding.ascii.getbytes(string.format("content-disposition: form-data; name=\"{0}\"; filename=\"{1}\"; parent_id=\"0\"{2}", guid.newguid(), path.getfilename(uploadfilename), environment.newline));         resultstream.write(buffer, 0, buffer.length);         buffer = encoding.ascii.getbytes("content-type: application/octet-stream" + environment.newline + environment.newline);         resultstream.write(buffer, 0, buffer.length);                     buffer = uploadfilebytes;         resultstream.write(buffer, 0, buffer.length);         buffer = encoding.ascii.getbytes(environment.newline);         resultstream.write(buffer, 0, buffer.length);         resultstream.flush();         buffer = resultstream.toarray();     }     return buffer; }  private byte[] assemblefilesblock() {     byte[] buffer;      using (memorystream resultstream = new memorystream())     {         buffer = getformattedboundary(false);         resultstream.write(buffer, 0, buffer.length);          buffer = assemblefile();         resultstream.write(buffer, 0, buffer.length);          resultstream.flush();         buffer = resultstream.toarray();     }      return buffer; }  private byte[] getformattedboundary(bool isendboundary) {     string template = isendboundary ? "--{0}--{1}" : "--{0}{1}";     return encoding.ascii.getbytes(string.format(template, "aabbccx30", environment.newline)); }  private httpwebrequest createrequest(int contentlength, string folderid) {     httpwebrequest webrequest;     webrequest = (httpwebrequest)webrequest.create("https://upload.box.com/api/2.0/files/content");      webrequest.method = "post";     webrequest.allowwritestreambuffering = true;     webrequest.contenttype = string.concat("multipart/form-data;boundary=", "aabbccx30");     webrequest.headers.add("accept-encoding", "gzip,deflate");     webrequest.headers.add("accept-charset", "iso-8859-1");     webrequest.headers.add("authorization", "bearer access token");     webrequest.contentlength = contentlength;     return webrequest; }` 

try code.

i haven't used john hoerr's sdk, uses restsharp dll , upload api given in http://developers.box.com/docs/#files-upload-a-file.

the parameter folder_id id of folder want upload file.

public void upload_doc(string folder_id,string accesstoken)         {             var client = new restclient("https://upload.box.com/api/2.0");             var request = new restrequest("files/content", method.post);             request.addparameter("parent_id", folder_id);               request.addheader("authorization", "bearer " + accesstoken);              string path = @"c:\users\xyz\desktop\homepage.png";             byte[] bytearray = system.io.file.readallbytes(path);              request.addfile("filename", bytearray, "homepage.png");              var responses = client.execute(request);             var content = responses.content;          }