C # serial port send receive data

   /********************** serial data receive event *****************************/        Private voidSerialport_datareceived (Objectsender, Serialdatareceivedeventargs e) {utf8encoding utf8encoding=Newutf8encoding (); byte[] Readbytes =New byte[ This.            Serialport.bytestoread]; intnum = This. Serialport.read (Readbytes,0, readbytes.length);  This. Builder. Clear ();//Empty Cache             This. Received_count + = (Long) Num;//Plus receive Count             This. Rxtextbox.invoke ((EventHandler)Delegate            {                if(! This. rxcharsetup.checked)//determine the format of the received data{//Get character length                     for(inti =0; i < readbytes.length; i++)                    {                        byteb = Readbytes[i];//Display hexadecimal                         This. Builder. Append ("0x"+ b.tostring ("X2") +" "); }                }                Else                {   //Display character formatting                     This. Builder. Append (Encoding.GetEncoding ("GB2312").                GetString (readbytes)); }                 This. Rxtextbox.selectionstart = This. Rxtextbox.textlength;  This. Rxtextbox.appendtext ( This. Builder.                ToString ());  This. Rxnumdata. Text ="Rx"+ This. Received_count.                ToString (); //Update Send Count            }); }

  /********************** send button *****************************/        Private voidSenddata_click (Objectsender, EventArgs e) {            if(! This. Serialport.isopen) {MessageBox.Show ("serial port is not open!!! ","Warning"); }            Else            {                intnum; if( This. txdatasetup.checked) {MatchCollection MatchCollection= Regex.Matches ( This. Txtextbox.text,"(? i) [\\da-f]{2}"); List<byte> list =Newlist<byte>(); foreach(Match matchinchmatchcollection) {list. ADD (byte. Parse (match.                    Value, Numberstyles.hexnumber)); }                     This. Serialport.write (list. ToArray (),0, List.                    Count); Num=list.                Count; }                Else                {                     This. Serialport.writeline ( This. Txtextbox.text); Num= This. TxtextBox.Text.Length +2; }                 This. Send_count + = (Long) num;  This. Txnumdata. Text ="Tx"+ This. Send_count.                ToString (); //Update Receive Count            }        }

C # serial port send receive data