C# Async socket server receives only one message from client -

-

i'm quite new sockets programming. hope problem presented understandable.

the problem when use client's button1_click send textbox's content - server gets first message. have no idea what's going wrong.

what might problem?

here server:

    public partial class form1 : form {     socket server;     byte[] bytedata = new byte[1024];      public form1()     {         initializecomponent();     }      private void form1_load(object sender, eventargs e)     {         try         {             server = new socket(addressfamily.internetwork,                                 sockettype.stream,                                 protocoltype.tcp);             ipendpoint endpoint = new ipendpoint(ipaddress.any, 20000);              server.bind(endpoint);             server.listen(1);             server.beginaccept(new asynccallback(accept), null);             textbox1.text = "server started...";         }         catch(exception ex)         {             messagebox.show(ex.message);         }     }      private void accept(iasyncresult ar)     {         try         {             socket client = server.endaccept(ar);             server.beginaccept(new asynccallback(accept), null);             client.beginreceive(bytedata, 0, bytedata.length,                 socketflags.none, new asynccallback(receive), client);          }         catch(exception ex)         {             messagebox.show(ex.message);         }     }      private void receive(iasyncresult ar)     {         socket client = (socket)ar.asyncstate;         client.endreceive(ar);          textbox1.invoke(new action(delegate ()         {             textbox1.appendtext(environment.newline                          + encoding.ascii.getstring(bytedata));         }));         bytedata = null;     } }

and here client:

    public partial class form1 : form {     socket client;      public form1()     {         initializecomponent();     }      private void textbox1_textchanged(object sender, eventargs e)     {         if (textbox1.text == null)             button1.enabled = false;         else             button1.enabled = true;     }      private void form1_load(object sender, eventargs e)     {         try         {             client = new socket(addressfamily.internetwork,                                 sockettype.stream,                                 protocoltype.tcp);             ipaddress ip = ipaddress.parse("127.0.0.1");             ipendpoint ipendpoint = new ipendpoint(ip, 20000);             client.connect(ipendpoint);         }         catch(exception ex)         {             messagebox.show(ex.message);         }     }      private void button1_click(object sender, eventargs e)     {         try         {              byte[] bytedata = encoding.ascii.getbytes(textbox1.text);             client.beginsend(bytedata, 0, bytedata.length, socketflags.none,                             new asynccallback(send), null);             textbox1.text = string.empty;         }         catch(exception ex)         {             messagebox.show(ex.message);         }     }      private void send(iasyncresult ar)     {         try         {             client.endsend(ar);         }         catch (objectdisposedexception)         { }         catch(exception ex)         {             messagebox.show(ex.message);         }     } }

in async, got re-init beginreceive in server side whenever want listen message.

therefore, in receive callback, should re-init beginreceive after endreceive. otherwise cannot next message:

private void receive(iasyncresult ar) {     socket client = (socket)ar.asyncstate;     client.endreceive(ar);     client.beginreceive(bytedata, 0, bytedata.length, //add beginreceive again         socketflags.none, new asynccallback(receive), client);      textbox1.invoke(new action(delegate ()     {         textbox1.appendtext(environment.newline                      + encoding.ascii.getstring(bytedata));     }));     bytedata = null; }

for more of working example async, check out: sending value server client sockets


Comments

Post a Comment

Popular posts from this blog

java - Suppress Jboss version details from HTTP error response -

-
my jboss verson jboss eap 6.3 when kind of error response sent jboss, adds server information response. following sample row response: http/1.1 400 bad request server: apache-coyote/1.1 content-type: text/html;charset=utf-8 content-length: 2391 date: tue, 19 jul 2016 09:30:46 gmt connection: close jboss web/7.4.8.final-redhat-4 - jbweb000064: error report jbweb000065: http status 400 - org.codehaus.jackson.map.jsonmappingexception: can not construct instance of mybean.type string value 'xyz': value not 1 of declared enum instance names @ [source: org.jboss.resteasy.core.interception.messagebodyreadercontextimpl$inputstreamwrapper@5e421c2b; line: 14, column: 26] (through reference chain: requestargs["request"]) jbweb000309: type jbweb000067: status report jbweb000068: message org.codehaus.jackson.map.jsonmappingexception: can not construct instance of mybean.type string value 'xyz': value not 1 of declared enum instance names @ [source: org.jboss...
Read more

gridview - Yii2 DataPorivider $totalSum for a column -

-
i have order , ordersearch models. in order list (actionindex) gridview there filtering , sorting. on of columns in order order_total (sum of products in order). i need implement sum of order_total in gridview. if manually counting activedataprovider->getmodels() array_map spend 3 seconds 3000 orders (localhost). don't want miss time. i see 2 ways make faster: create cache every filter , update lifetime (horrible) the interesting can right in ordersearch->search() method $query method. don't understand how can pass in controller. example of code 2nd way: class ordersearch extends order { public $totalsum; public function search($params) { $query = order::find(); $dataprovider = new activedataprovider([ 'query' => $query, ]); $this->load($params); $this->totalsum = $query->sum('order_total'); // works fast return $dataprovider; } } after i...
Read more

Sass watch command compiles .scss files before full sftp upload -

-
i use winscp download , edit .scss files , sass on linux (on server) compile them .css . after saving file, use: sass scss/style.scss css/style.css , replaces css file compiled sccs. the problem i want skip part return command line after editing scss file, sake of automation , saving time. but, if use watch command: sass --watch scss/style.scss:css/style.css synchronize 2 files, alerts nonexistent css errors pop up: change detected to: scss/style.scss error scss/style.scss (line 232: invalid css after "...ht: bold; line-": expected "{", "") note that when file uploads quicker usual (sometimes happens) watch command job, no errors. this because, when file upload takes time, sass compiles scss file (on server) before uploaded remote folder. thus, compiles part of file, resulting in css errors. is there way set timer watch command waits few seconds after detects changes , before compiling? any other way overcome is, of course, ...
Read more