Serial port C# wpf received data continuous

Question

've made a GUI in WPF to read data via RS232 and.The only problem is I have to keep pressing a button to send a 'Receive data' command to my controller via RS232 so it sends the data back. I want to implement this in continuously/real time so I don't have to keep pressing a button to communicate with my device. I've written while loops and that just freezes my program, i've also tried a checkbox so if it's checked it gets data and that also freezes the GUI.using backGroundWorker i want to do or Threads, below is my code please, TextBox1 is Receiving Data,TextBox2 is Sending data, am binding Receiving data to textbox1 string"Message", see code as attachemnt
thanks

Glenn Patton · Answer

Hi Sorry still a little new to this forum didn't see your post until now! If you are using .NET2 Serial Port class you use an event handler delegate (called belive it or not name_of_port.DataReceived += SerialDataEventHandlerNAME have a look on google also www.lvr.com for examples. My example is pasted below myComPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(port_DataReceived_1); -------- private void port_DataReceived_1(object senderSerialDataReceivedEventArgs e) { InputData = myComPort.ReadExisting(); if (InputData != String.Empty) { this.BeginInvoke(new SetTextCallback(SetText) new object[]{ InputData}); // label1.Text = label1.Text + I got some data; } } private void SetText(string text) { this.rtbIncoming.Text += text; } There is a way to poll the read function with a timer though this can get a bit erratic in large programs private void tmrPollForRecievedData_Tick(object sender EventArgs e) { string charToRead; while (myComPort.BytesToRead > 0) { charToRead = (myComPort.ReadExisting()); rtbIncoming.Text = rtbIncoming.Text + (charToRead);//+ System.Convert.ToString(charToRead); } tmrPollForRecievedData.Enabled = false; } The down side with this is the timer component is maskable by the processor so this simple method can lead to some data going missing using DataRecieved Event gets around this. Also to avoid locking the form use the non blocking method ReadExisting() which will return data that has been read.

Glenn Patton · Answer

Also might be of use to you Serial Port Complete by Jan Axelson ISBN 978-1-931448-06-2 is also a good reference (I have several copies Home Office Lost on a train!)

Glenn Patton · Answer

Glad to be of help Vulpes & others have helped me. Passing on the good vibes!

Glenn Patton · Answer

Glad to be of help Vulpes & others have helped me. Passing on the good vibes!

gagan kumar · Answer

Hi  thank you very much its nice answer i got it.

gagan kumar · Answer

hi suthish till now i didn't get answer from anyone so its not resolved can u help me please

Suthish Nair · Answer

Resolved?