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How to read specific characters from RS232 serial port data

I am trying to retrieve weight data from a weight indicator which sends data through the RS232 com port ( Converted through USB)
following is the application I designed to receive data
enter image description here
the problem is it shows all the data which is sent from the indicator but the real weight reading is 15,000.
How can I achieve this?
Thank you
Data sheet of the indicator is as follows
Code is as follows
namespace Weight_Test
{
public partial class Form1 : Form
{
string dataIN;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string[] ports = SerialPort.GetPortNames();
cbComPort.Items.AddRange(ports);
btnOpen.Enabled = true;
btnClose.Enabled = false;
}
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
dataIN = serialPort1.ReadExisting();
this.Invoke(new EventHandler(ShowData));
}
private void ShowData(object sender, EventArgs e)
{
txtWeight.Text = dataIN;
}
private void btnOpen_Click(object sender, EventArgs e)
{
try
{
serialPort1.PortName = cbComPort.Text;
serialPort1.BaudRate = Convert.ToInt32(9600);
serialPort1.DataBits = Convert.ToInt32(8);
serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), "One");
serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), "None");
serialPort1.Open();
btnOpen.Enabled = false;
btnClose.Enabled = true;
}
catch (Exception err)
{
MessageBox.Show(err.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
btnOpen.Enabled = true;
btnClose.Enabled = false;
}
}
private void btnClose_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
btnOpen.Enabled = true;
btnClose.Enabled = false;
}
}
}
}

It all seems to work properly. All you need is processing of received data.
You said that your result should be 15,000.
Depends on what sensor you use, it can supply specified resolution, accuracy. Please edit your post and give us some information from datasheet about sending data.
Since you got "+01500001F🥹", it looks like you have 15,000.01, which very is good, but of course I can't be sure.
All you have to do is to process these data. If you have it in string format, you should use Substring method to get rid of decimal places.
For example, with:
string receivedText = DataIN.Substring(0,7);
You'll get "+015000", which you can easily convert to Int32 value, using:
int receivedValue = Convert.ToInt32(receivedText);
And you'll finally get your 15000 as integer.

load contacts from telegram to C#

I am using language programming C# and I am making a program that is using Telegram API called TLSharp and I wanna know can I load My contacts from Telegram So I used these codes that I found in stackoverflow but something went wrong
private async void button2_Click(object sender, EventArgs e)
{
try
{
client = new TelegramClient(****, "****");
await client.ConnectAsync();
button2.BackColor = Color.Green;
button1.Enabled = true;
button2.Text = "Connected";
}
catch
{
button2.BackColor = Color.Red;
button1.Enabled = false;
button2.Text = "Disconnected";
}
}
string hash;
private async void button1_Click(object sender, EventArgs e)
{
try
{
hash = await client.SendCodeRequestAsync(textBox1.Text);
panel1.Hide();
panel2.Show();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message,"Error");
}
}
private async void button3_Click(object sender, EventArgs e)
{
try
{
var result = await client.GetContactsAsync();
//find recipient in contacts
var user = result.users.lists.Where(x=>x.GetType()==typeof(TLUser)).Cast<TLUser>();
foreach (var item in user.username)
{
listBox1.Items.Add(item);
}
}
catch
{
}
}
But the problem is here , the list-box shows something which isn't Username and I don't know what is it and the list-box shall show my username of my contacts; It shows only my username like this #username

C# System.Windows.Threading

I was programming a "Minecraft" server manager program, but i don't know why, System.Windows.Threading doesn't exist (Visual C# says that), and in here: http://msdn.microsoft.com/en-us/library/vstudio/system.windows.threading.dispatcher, it says it should exist. Please help! (Message boxes are in Polish, becouse im from Poland, later i will add multi language support)
My code:
using System;
using System.IO;
using System.Windows.Forms;
using System.Diagnostics;
using System.Windows.Threading;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public Process server;
private Boolean runServer()
{
if (!File.Exists(textBox2.Text))
{
MessageBox.Show("Brak określonej ścieżki dostępu! (" + textBox2.Text + ")", "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
Process process = new Process
{
StartInfo =
{
FileName = textBox2.Text,
//Arguments = textBox3.Text,
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = false,
}
};
process.OutputDataReceived += new DataReceivedEventHandler(server_outputDataReceived);
process.ErrorDataReceived += new DataReceivedEventHandler(server_outputDataReceived);
server = process;
if (process.Start())
return true;
else
{
MessageBox.Show("Nie można włączyć serwera!", "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
}
private String ReadFile(String filename, int line)
{
StreamReader reader = new StreamReader(filename);
for (int i = 0; i < line; i++)
{
reader.ReadLine();
}
return reader.ReadLine();
}
private void ReloadOPs()
{
if (!File.Exists(textBox1.Text))
{
MessageBox.Show("Sciezka dostępu do pliku z listą graczy posiadających OP nie istnieje! (" + textBox1.Text + ")", "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
tabControl1.SelectedTab = tabPageOptions;
textBox1.SelectAll();
return;
}
String line = ReadFile(textBox1.Text, 0);
comboBox1.Items.Clear();
for (int i = 1; i < File.ReadAllLines(textBox1.Text).Length; i++)
{
if (!String.IsNullOrWhiteSpace(ReadFile(textBox1.Text, i)))
{
comboBox1.Items.Add(line);
line = ReadFile(textBox1.Text, i);
}
}
MessageBox.Show("Lista graczy z OP, została odświeżona.");
}
// OPs combobox (OPs)
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
groupBox1.Text = comboBox1.SelectedItem.ToString();
groupBox1.Visible = true;
}
private void Form1_Load(object sender, EventArgs e)
{
textBox1.Text = Application.StartupPath.ToString() + #"\ops.txt";
ReloadOPs();
}
// Reload OPs button (OPs)
private void button1_Click(object sender, EventArgs e)
{
ReloadOPs();
}
// Save button (Options)
private void button4_Click(object sender, EventArgs e)
{
}
private void server_outputDataReceived(object sender, DataReceivedEventArgs e)
{
Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Normal, () =>
{
addConsoleMessage(e.Data.ToString(), true);
});
}
// Run server button (Menu)
private void button5_Click(object sender, EventArgs e)
{
if (!runServer())
return;
server.BeginOutputReadLine();
button6.Enabled = true;
}
// Stop server button (Menu)
private void button6_Click(object sender, EventArgs e)
{
if(!server.HasExited)
server.Kill();
button6.Enabled = false;
}
private void addConsoleMessage(String message, Boolean refresh)
{
listBox1.Items.Add(message);
if (refresh)
listBox1.Refresh();
}
}
}
My error code: Cannot convert lambda expression to type 'System.Delegate' because it is not a delegate type (server_outputDataReceived)

You are targeting WinForm application and you are trying to use threading from WPF.
System.Windows.Threading Namespace
Contains types to support the Windows Presentation Foundation (WPF)
threading system
You should use: System.Threading Namespace. You may also see Threading in Windows Forms by Jon Skeet

C# Batch file output problems

I have been working on a manager application for a Minecraft server, when I run my program, the console shows and disappears, if I run it manually, it runs without and problems.
Batch file code:
java -Xmx1024M -jar craftbukkit-1.7.2-R0.3.jar -o false
My full code (MessageBoxes are in Polish, becouse im from Poland, but later i will add support for other languages):
using System;
using System.IO;
using System.Windows.Forms;
using System.Diagnostics;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public Process server;
private Boolean runServer()
{
if (!File.Exists(textBox2.Text))
{
MessageBox.Show("Brak określonej ścieżki dostępu! (" + textBox2.Text + ")", "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
Process process = new Process
{
StartInfo =
{
FileName = textBox2.Text,
//Arguments = textBox3.Text,
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = false,
}
};
process.OutputDataReceived += new DataReceivedEventHandler(server_outputDataReceived);
process.ErrorDataReceived += new DataReceivedEventHandler(server_outputDataReceived);
server = process;
if (process.Start())
return true;
else
{
MessageBox.Show("Nie można włączyć serwera!", "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
}
private String ReadFile(String filename, int line)
{
StreamReader reader = new StreamReader(filename);
for (int i = 0; i < line; i++)
{
reader.ReadLine();
}
return reader.ReadLine();
}
private void ReloadOPs()
{
if (!File.Exists(textBox1.Text))
{
MessageBox.Show("Sciezka dostępu do pliku z listą graczy posiadających OP nie istnieje! (" + textBox1.Text + ")", "Błąd", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
tabControl1.SelectedTab = tabPageOptions;
textBox1.SelectAll();
return;
}
String line = ReadFile(textBox1.Text, 0);
comboBox1.Items.Clear();
for (int i = 1; i < File.ReadAllLines(textBox1.Text).Length; i++)
{
if (!String.IsNullOrWhiteSpace(ReadFile(textBox1.Text, i)))
{
comboBox1.Items.Add(line);
line = ReadFile(textBox1.Text, i);
}
}
MessageBox.Show("Lista graczy z OP, została odświeżona.");
}
// OPs combobox (OPs)
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
groupBox1.Text = comboBox1.SelectedItem.ToString();
groupBox1.Visible = true;
}
private void Form1_Load(object sender, EventArgs e)
{
textBox1.Text = Application.StartupPath.ToString() + #"\ops.txt";
ReloadOPs();
}
// Reload OPs button (OPs)
private void button1_Click(object sender, EventArgs e)
{
ReloadOPs();
}
// Save button (Options)
private void button4_Click(object sender, EventArgs e)
{
}
private void server_outputDataReceived(object sender, DataReceivedEventArgs e)
{
addConsoleMessage(e.Data.ToString(), true);
}
// Run server button (Menu)
private void button5_Click(object sender, EventArgs e)
{
if (!runServer())
return;
server.BeginOutputReadLine();
button6.Enabled = true;
}
// Stop server button (Menu)
private void button6_Click(object sender, EventArgs e)
{
if(!server.HasExited)
server.Kill();
button6.Enabled = false;
}
private void addConsoleMessage(String message, Boolean refresh)
{
listBox1.Items.Add(message);
if (refresh)
listBox1.Refresh();
}
}
}
My problem is that program crashes becouse InvaildOperationException was unhandled (listBox1.Items.Add(message) in addConsoleMessage).
External error information: Invalid operation between threads: the control 'listBox1' is accessed from a thread other than the thread it was created.

You cannot update UI form background thread. Try this
WPF
private void server_outputDataReceived(object sender, DataReceivedEventArgs e)
{
Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Normal, () =>
{
addConsoleMessage(e.Data.ToString(), true);
});
}
Update
In WinForms the Invoke/BeginInvoke methods are directly on the control objects as you can see from the docs of System.Windows.Forms.Control. So you'd have listBox1.BeginInvoke(...) for example.

Saving changes from a combobox in a database

I have a combobox and want to save the changes in the database.
What I want to do is if the combobox is selected and it is true it must run the code below. If it is false it must then skip the code and go further.
The code below is checking if the combobox is enabled. But when I'm compiling it's saying true when not selected
private void Log()
{
if (kaartburgerlijkestand.Enabled)
{
veranderingBurgelijkestaat();
}
}
The code below is saving the data in the database
private string veranderingBurgerlijkestaat()
{
string gebruiker = curMedewerker.Behandelnaam;
string bekeken = prodermaform.pKaart();
string tabblad = tabControl1.SelectedTab.Text;
string pat = CPatient.GeefPatientNaam(patient.Id);
string wijz = "Burgerlijkestaat: " + kaartBurgerlijkestand.Text;
CDb dcon = new CDb();
try
{
if (dcon.Open())
{
SqlCommand cmd = new SqlCommand("INSERT INTO dbo.loggen(Gebruiker, Bekeken, Tabblad, Patientnaam, Wijziging, Datum) VALUES(#gebruiker, #bekeken, #tabblad, #pat, #wijz, #datum)", dcon.Conn);
cmd.Parameters.AddWithValue("#gebruiker", gebruiker);
cmd.Parameters.AddWithValue("#bekeken", bekeken);
cmd.Parameters.AddWithValue("#tabblad", tabblad);
cmd.Parameters.AddWithValue("#pat", pat);
cmd.Parameters.AddWithValue("#wijz", wijz);
cmd.Parameters.AddWithValue("#datum", DateTime.Now);
cmd.ExecuteNonQuery();
cmd.Dispose();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
dcon.Close();
}
return wijz;
}
Could someone show me a example how to do it
I Found the solution
I have made a check
private void doCheck(object sender, EventArgs e)
{
cmbox = false;
if (kaartBurgerlijkestaat.Focused)
{
veranderingBurgerlijkestand();
}
cmbox = true;
}
Then I used the SelectedValueChanged Event
private void kaartBurgerlijkestand_SelectedValueChanged(object sender, EventArgs e)
{
if (cmbox)
doCheck(sender, e);
}
And it works fine.
I want to thank you all for helping me!

Add an Event Listener, the kaartburgerlijkestand.Enabled only check your combobox is enabled to select or not.
Add this line after your InitializeComponent(); line of Form.cs file
kaartburgerlijkestand.SelectedIndexChanged += new System.EventHandler
(this.kaartburgerlijkestand_SelectedIndexChanged);
Also add a function for above code :
private void kaartburgerlijkestand_SelectedIndexChanged(object sender, EventArgs e)
{
veranderingBurgelijkestand();
}