Reading two sensors values in Visual Studio in separate textBox?

[lukasz2401]

Hello, I'm trying to build a simple application to read several different sensors in "Microsoft Visual Studio 2022" in C# Windows form Applications (.NET Framework 4.7.2), my programming knowledge is zero that's why I'm looking at different tutorials to build something from scratch, I encountered a problem when I want to use more than one sensor and get the reading in different textBoxes, I don't know how to divide the incoming data so that it hits the appropriate textBox.
Would there be someone who could help me ?
code of Arduino

/*
  YF-S201-Water-Flow-Sensor
  modified on 14 oct 2020
  by Amir Mohammad Shojaee @ Electropeak
  Home

  based on www.hobbytronics.co.uk examples
*/
double flow1; //Water flow L/Min
double flow2; //Water flow L/Min  
int flow1sensor = 2;
int flow2sensor = 3; 
unsigned long currentTime;
unsigned long lastTime;
unsigned long pulse_freq;
 
void pulse () // Interrupt function

{
   pulse_freq++;
}

   void setup()
 {
   pinMode(flow1sensor, INPUT);
   Serial.begin(9600);
   attachInterrupt(0, pulse, RISING); // Setup Interrupt
   currentTime = millis();
   lastTime = currentTime;
   pinMode(flow2sensor, INPUT);
   Serial.begin(9600);
   attachInterrupt(0, pulse, RISING); // Setup Interrupt
   currentTime = millis();
   lastTime = currentTime;
}

   void loop ()
{
   currentTime = millis();
   // Every second, calculate and print L/Min
   if(currentTime >= (lastTime + 500))
   {
      lastTime = currentTime; 
      // Pulse frequency (Hz) = 7.5Q, Q is flow rate in L/min.
      flow1 = (pulse_freq / 7.5); 
      pulse_freq = 0; // Reset Counter
      flow2 = (pulse_freq / 7.5); 
      pulse_freq = 0; // Reset Counter
      Serial.print(flow1, DEC); 
      Serial.println(" L/Min");  
      Serial.print(flow2, DEC); 
      Serial.println(" L/Min");   
   }
}

VS2022

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;

namespace panel_2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            serialPort1.Close();
            serialPort1.PortName = "com16";
            serialPort1.BaudRate = 9600;
            serialPort1.DataBits = 8;
            serialPort1.Parity = Parity.None;
            serialPort1.StopBits = StopBits.One;
            serialPort1.Handshake = Handshake.None;
            serialPort1.Encoding = System.Text.Encoding.Default;
            serialPort1.Open();
        }

        private void Timer1_Tick(object sender, EventArgs e)
        { 
            string s;
            s = textBox1.Text + "," + "," + "," + "";
            string[] somestring;
            // Split string based on comma
            somestring = s.Split(new char[] { ',' });
            textBox2.Text = somestring[1];
            textBox3.Text = somestring[2];
            textBox4.Text = somestring[3];
            textBox5.Text = "";
        }

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            try
            {
                string mydata = "";
                mydata = serialPort1.ReadExisting();
                if (textBox1.InvokeRequired)
                    textBox1.Invoke(new Action(() => { textBox1.Text += mydata; }));
                else
                    textBox1.Text += mydata;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}

[b707]

General principle:
You need to add labels to the values so that the C# program can distinguish them.
That is, from the arduino side, you need to print not just two numbers, but something like
Flow1 = 22 L/min
And on the receiver side, you need to parse these lines and the one that starts with Flow1 send to the first TextBox, and with Flow2 - to the second

[horace]

looks like you are transmitting comma seperate values which you split up using string.split() method
if just running using the Serial monitor do the values display correctly?
give an example?

[lukasz2401]

the the print in serial Monitor looks like this

in the code I added 1 and 2 to know which reading is from which sensor

      Serial.print(flow1, DEC); 
      Serial.println(" L/Min");  
      Serial.print(flow2, DEC); 
      Serial.println(" L/Min");

      Serial.print(flow1, DEC); 
      Serial.println(" 1 L/Min");  
      Serial.print(flow2, DEC); 
      Serial.println(" 2 L/Min");

reading is only from one sensor, there is no reading from the second sensor.

[horace]

assuming each line is like

13.06666 1 L/Min

you can split and parse so

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string LastCOMMessage = "13.06666 1 L/Min";
            string[] messageComponents = LastCOMMessage.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            //  string[] messageComponents = LastCOMMessage.Split(' ', StringSplitOptions.RemoveEmptyEntries);
            for (int i = 0; i < messageComponents.Length; i++)
                Console.WriteLine("element " + i + " is " + messageComponents[i]);
            float f = float.Parse(messageComponents[0]);        // parse data
            Console.Write("flow " + f);
            int sensor = int.Parse(messageComponents[1]);       // parse sensor
            Console.WriteLine(" from sensor " + sensor);
        }
    }
}

a run gives

element 0 is 13.06666
element 1 is 1
element 2 is L/Min
flow 13.06666 from sensor 1

you know the sensor and the data value you can now copy the value to the appropriate TextBox

Note: avoid posting images of text displays - they consume a lot of memory and are impossible to copy from