c# - Parse Notification .net UTF-8 format -

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i using parse .net api pushnotification android. webservice here

private bool pushnotification(string pushmessage)  {     bool ispushmessagesend = false;     string poststring = "";     string urlpath = "https://api.parse.com/1/push";     var httpwebrequest = (httpwebrequest)webrequest.create(urlpath);     poststring = "{ \"channels\": [ \"trials\"  ], " +                      "\"data\" : {\"alert\":\"" + pushmessage + "\"}" +                      "}";     httpwebrequest.contenttype = "application/json";     httpwebrequest.contentlength = poststring.length;     httpwebrequest.headers.add("x-parse-application-id", "my parse app id");     httpwebrequest.headers.add("x-parse-rest-api-key", "my rest api key");     httpwebrequest.method = "post";     streamwriter requestwriter = new streamwriter(httpwebrequest.getrequeststream());     requestwriter.write(poststring);     requestwriter.close();     var httpresponse = (httpwebresponse)httpwebrequest.getresponse();     using (var streamreader = new streamreader(httpresponse.getresponsestream()))     {         var responsetext = streamreader.readtoend();         jobject jobjres = jobject.parse(responsetext);         if (convert.tostring(jobjres).indexof("true") != -1)         {             ispushmessagesend = true;         }     } return ispushmessagesend; }

this code works correctly english alphabet. when try use letter "ü","ş","ö","ç" etc. error occurred.

error here 

system.net.webexception: request aborted: request canceled. ---> system.io.ioexception: cannot close stream until bytes written.   @ system.net.connectstream.closeinternal(boolean internalcall, boolean aborting)   --- end of inner exception stack trace -   @ system.net.connectstream.closeinternal(boolean internalcall, boolean aborting)   @ system.net.connectstream.system.net.icloseex.closeex(closeexstate closestate)   @ system.net.connectstream.dispose(boolean disposing)   @ system.io.stream.close()   @ system.io.streamwriter.dispose(boolean disposing)   @ system.io.streamwriter.close()

how can solve problem.

thanks

here go:

httpwebrequest.contentlength = poststring.length;

you have assumed each character 1 byte, not case. can calculate utf-8 length via encoding.getbytecount(s) - use instead.

httpwebrequest.contentlength = myencopding.getbytecount(poststring);

or better: pre-compute payload:

var data = myencopding.getbytes(poststring); httpwebrequest.contentlength = data.length; //... requeststream.write(data, 0, data.length);

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