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?