Multiple time stamp display

Question

I am having trouble allocating only 1 time stamp per data received.. Instead of 11:06 AM T 1 26 being reflected on my text box, I am getting this 11:06 AM T 11:06 AM 92 11:06 AM 211:06 AM 8.75. Coding are as follows: string time = DateTime.Now.ToString("HH:mm:ss"); txtData.AppendText(time + " " + RxString); How should i restrict the time from displaying so many time?

Manoj Bhoir · Answer

Hi, You said you get : 14:20:44 T 1 25.0 14:20:56 T 14:20:56 T 1 25.0 14:20:56 T 14:21:04 T 1 26.0 14:21:04 It looks like RxString is empty here. Try this : private void DisplayText(object sender, EventArgs e) { if ( RxString != "") { txtData.AppendText(time + " " + RxString); } } So if RxString is empty then it will not append data to textbox.

Loh Jy · Answer

I hope this helps to clear any doubt.. Basically, connected to a com port to receive data.. and I want to know exactly when is the textbox being feed with a incoming data.. that's why I need 1 time stamp per data only. namespace SerialCom { public partial class Form1 : Form { string RxString; //Variable string time = DateTime.Now.ToString("HH:mm:ss"); public Form1() { InitializeComponent(); } private void btnStart_Click(object sender, EventArgs e) { serialPort1.PortName = "COM4"; serialPort1.BaudRate = 9600; serialPort1.Open(); if (serialPort1.IsOpen) { btnStart.Enabled = false; btnStop.Enabled = true; txtData.ReadOnly = false; } } private void btnStop_Click(object sender, EventArgs e) { if (serialPort1.IsOpen) { serialPort1.Close(); btnStart.Enabled = true; btnStop.Enabled = false; txtData.ReadOnly = true; } } private void txtData_KeyPress(object sender, KeyPressEventArgs e) { if (!serialPort1.IsOpen) return; // If the port is closed, don't try to send a character. char[] buff = new char[1]; // If the port is Open, declare a char[] array with one element. buff[0] = e.KeyChar; // Load element 0 with the key character. serialPort1.Write(buff, 0, 1); // Send the one character buffer. e.Handled = true;// Set the KeyPress event as handled so the character won't // display locally. If you want it to display, omit the next line. } private void DisplayText(object sender, EventArgs e) { txtData.AppendText(time + " " + RxString); } private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) { RxString = serialPort1.ReadExisting(); this.Invoke(new EventHandler(DisplayText)); StreamWriter MyStreamWriter = new StreamWriter(@"c:	est1.txt",true); //True tell SW to append to file instead of overwriting MyStreamWriter.Write(time + " " + RxString); MyStreamWriter.Flush(); MyStreamWriter.Close(); } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { if (serialPort1.IsOpen) serialPort1.Close(); } } }

Upendra Pratap Shahi · Answer

Is this in loop, here it seems like your textbox bind in loop. Am I right?

Loh Jy · Answer

No, I think i need code to restrict on how many time stamp are displaying. Every data received (T 1 25.0) should have a time stamp reflected in front of it to show when is the data being received. So i need stuff like 14:20:44 T 1 25.0 14:20:56 T 1 25.0 14:21:04 T 1 26.0 etc.. But what i am getting now is 14:20:44 T 1 25.0 14:20:56 T 14:20:56 T 1 25.0 14:20:56 T 14:21:04 T 1 26.0 14:21:04

Manoj Bhoir · Answer

Hi, If you want output 11:06 AM T 1 26 in your textbox and 1 26 is time zone value then use this code : txtData .Text = DateTime.Now.ToString(" HH:mm tt T zzz"); This will give you output : 10.45 AM T +5:30

Rajeesh Menoth · Answer

Hi, Check this :

Upendra Pratap Shahi · Answer

txtData .Text = DateTime.Now.ToString(" HH:mm:ss ");

Loh Jy · Answer

It's a string variable that was declare at the start of the program just "String RxString;"

Upendra Pratap Shahi · Answer

What is RxString dear?