Datareceived event in Winforms application [Resolved]

Dear Sudhakar,

You can use the textbox1.Clear(); method to clear the text before load.

Code:

public void AddDataMethod(String myString) 

{ 

textbox1.Clear();

textbox1.AppendText(myStrin g); 

} 

Happy Coding.
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Refer this link
http://stackoverflow.com/questions/11590945/how-to-display-the-data-read-in-datareceived-event-handler-of-serialport

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Chandu
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Dear Sudhakar,

You can use the below code:-

public void SerialPortDataReceived(object sender, SerialDataReceivedEventArgs e) 

{ 

RichTextBoxID.Text = Convert.ToString(port.ReadExisting()) ;

} 

Happy Coding
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Sample
This example adds a SerialDataReceivedEventHandler to DataReceived to read all the available data received on the COM1 port.

using System;

using System.IO.Ports;



class PortDataReceived

{

    public static void Main()

    {

        SerialPort mySerialPort = new SerialPort("COM1");



        mySerialPort.BaudRate = 9600;

        mySerialPort.Parity = Parity.None;

        mySerialPort.StopBits = StopBits.One;

        mySerialPort.DataBits = 8;

        mySerialPort.Handshake = Handshake.None;



        mySerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);



        mySerialPort.Open();



        Console.WriteLine("Press any key to continue...");

        Console.WriteLine();

        Console.ReadKey();

        mySerialPort.Close();

    }



    private static void DataReceivedHandler(

                        object sender,

                        SerialDataReceivedEventArgs e)

    {

        SerialPort sp = (SerialPort)sender;

        string indata = sp.ReadExisting();

        Console.WriteLine("Data Received:");

        Console.Write(indata);

    }

}

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Chandu
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Refer this link for writing to RichTextBox
http://stackoverflow.com/questions/6521475/how-can-i-redirect-process-output-console-to-richtextbox
http://stackoverflow.com/questions/8907490/serialport-datareceived-event-does-not-fire
http://stackoverflow.com/questions/17324886/read-back-at-command-response-in-a-richtextbox

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Chandu
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@Bandi.......thnk's first of all,but i wan to display the mystring in textbox,but your above function return textbox.append
i wan only to display the upcoming output as textbox.text(mystring);


public delegate void AddDataDelegate(String myString);
public AddDataDelegate myDelegate;

private void Form1_Load(object sender, EventArgs e)
{
//...
this.myDelegate = new AddDataDelegate(AddDataMethod);
}

public void AddDataMethod(String myString)
{
textbox1.AppendText(myStrin g);
}

private void mySerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
string s= sp.ReadExisting();

textbox1.Invoke(this.myDelegate, new Object[] {s});
}

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Thnk's @mahesh.........it worked.

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