We Keep Coding

C# display a variable in a Textbox

i am sending Sensor information with a NUCLEOF411RE to my PC. I receive this data on the COM98 with a BaudRate of 115200. Now i want to program a Windows Application that will split my string and put it on my textboxes. until now i display the data with a Button_click event. It puts values on the Textboxes that actually are the real values. But if i move my Sensor and klick the button again there should be a lot more different values, but there are the same values on the textboxes. In addition i want to refresh the textboxes automatically and not with a button click.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO.Ports;
namespace BNO080
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
getAvailablePorts();
}
public string comport;
SerialPort serial = new SerialPort();
void getAvailablePorts()
{
String[] ports = SerialPort.GetPortNames();
comboBox1.Items.AddRange(ports);
comport = comboBox1.Text;
}
private void button1_Click(object sender, EventArgs e)
{
try
{
if(comboBox1.Text=="" || textBox6.Text=="")
{
MessageBox.Show("Please Select Port Settings");
}
else
{
serial.PortName = comboBox1.Text;
serial.BaudRate = Convert.ToInt32(textBox6.Text);
serial.Parity = Parity.None;
serial.StopBits = StopBits.One;
serial.DataBits = 8;
serial.Handshake = Handshake.None;
serial.Open();
MessageBox.Show("connected!");
}
}
catch (UnauthorizedAccessException)
{
MessageBox.Show("Unauthorised Access");
}
}
private void button2_Click(object sender, EventArgs e)
{
textBox1.Clear();
textBox2.Clear();
textBox3.Clear();
textBox4.Clear();
textBox5.Clear();
MessageBox.Show("connection closed!");
serial.Close();
}
private void button3_Click(object sender, EventArgs e)
{
try
{
textBox5.Text = serial.ReadLine();
/*String[] Stringsizes = A.Split(new char[] {' '});
textBox1.Text = Stringsizes[0];
textBox2.Text = Stringsizes[1];
textBox3.Text = Stringsizes[2];
textBox4.Text = Stringsizes[3];*/
// textBox5.Text = A;
//Array.Clear(Stringsizes, 0, 3);
}
catch (Exception) { }
}
}
}
can someone help me?

Can you give more information why you use the Button_Click Event to read the text? Maybe it is a possible way for you to subscribe for the DataReceived-Event of the COM-port?
It would look something like this:
serial.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
private static void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
string receivedString = serial.ReadExisting();
//Do something here...
}

I'd do a couple things. First subscribe to the DataReceived event on the serial port. This event handler will get called when there is data available on the serial port. Then in the event handler you can read from the serial port and add it to your textbox. You can't add it directly (see the AppendText function) because the event handler is called with a different thread, only the UI thread can update UI components (or you'll get a cross-thread exception).
...
public Form1()
{
InitializeComponent();
getAvailablePorts();
// Subscribe to the DataReceived event. Our function Serial_DataReceived
// will be called whenever there's data available on the serial port.
serial.DataReceived += Serial_DataReceived;
}
// Appends the given text to the given textbox in a way that is cross-thread
// safe. This can be called by any thread, not just the UI thread.
private void AppendText(TextBox textBox, string text)
{
// If Invoke is required, i.e. we're not running on the UI thread, then
// we need to invoke it so that this function gets run again but on the UI
// thread.
if (textBox.InvokeRequired)
{
textBox.BeginInvoke(new Action(() => AppendText(textBox, text)));
}
// We're on the UI thread, we can append the new text.
else
{
textBox.Text += text;
}
}
// Gets called whenever we receive data on the serial port.
private void Serial_DataReceived(object sender,
SerialDataReceivedEventArgs e)
{
string serialData = serial.ReadExisting();
AppendText(textBox5, serialData);
}

Because i want to add an rotating 3D cube i decided to switch to WPF. I heard it is much easier to implement a 3D graphic there. So i copied my code to the new WPF project. But now i got already problems to visualize my values on the Textboxes. It doesnt work. It looks like the Evenhandler did not fire an event while receiving Data from the com port.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;
using System.ComponentModel;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data;
using System.Drawing;
namespace cube
{
/// <summary>
/// Interaktionslogik für MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
getAvailablePorts();
serial.DataReceived += Serial_DataReceived;
}
public bool button3clicked = false;
public bool button4clicked = false;
public bool button5clicked = false;
SerialPort serial = new SerialPort();
void getAvailablePorts()
{
List<string> Itemlist = new List<string>();
String[] ports = SerialPort.GetPortNames();
Itemlist.AddRange(ports);
comboBox1.ItemsSource = Itemlist;
}
private void button1_Click_1(object sender, EventArgs e)
{
try
{
if (comboBox1.Text == "" || textBox6.Text == "")
{
MessageBox.Show("Please Select Port Settings");
}
else
{
serial.PortName = comboBox1.Text;
serial.BaudRate = Convert.ToInt32(textBox6.Text);
serial.Parity = Parity.None;
serial.StopBits = StopBits.One;
serial.DataBits = 8;
serial.Handshake = Handshake.None;
serial.Open();
MessageBox.Show("connected!");
}
}
catch (UnauthorizedAccessException)
{
MessageBox.Show("Unauthorised Access");
}
}
private void button2_Click_1(object sender, EventArgs e)
{
textBox1.Clear();
textBox2.Clear();
textBox3.Clear();
textBox4.Clear();
textBox5.Clear();
MessageBox.Show("connection closed!");
serial.Close();
textBox1.Text = "test";
}
private void AppendText(string[] text)
{
try
{
textBox1.Text = text[0];
textBox2.Text = text[1];
textBox3.Text = text[2];
textBox4.Text = text[3];
}
catch (Exception) { }
}
private void Safe_Position1(TextBox tBr1, TextBox tBi1, TextBox tBj1, TextBox tBk1, string[] text)
{
if (button3clicked == true)
{
tBr1.Text = text[0];
tBi1.Text = text[1];
tBj1.Text = text[2];
tBk1.Text = text[3];
button3clicked = false;
}
}
private void Safe_Position2(TextBox tBr2, TextBox tBi2, TextBox tBj2, TextBox tBk2, string[] text)
{
if (button4clicked == true)
{
tBr2.Text = text[0];
tBi2.Text = text[1];
tBj2.Text = text[2];
tBk2.Text = text[3];
button4clicked = false;
}
}
private void Safe_Position3(TextBox tBr3, TextBox tBi3, TextBox tBj3, TextBox tBk3, string[] text)
{
if (button5clicked == true)
{
tBr3.Text = text[0];
tBi3.Text = text[1];
tBj3.Text = text[2];
tBk3.Text = text[3];
button5clicked = false;
}
}
private void Serial_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
string serialData = serial.ReadLine();
String[] text = serialData.Split(new char[] { ' ' });
AppendText(text);
Safe_Position1(textBox5, textBox7, textBox8, textBox9, text);
Safe_Position2(textBox10, textBox11, textBox12, textBox13, text);
Safe_Position3(textBox14, textBox15, textBox16, textBox17, text);
}
private void button3_Click(object sender, EventArgs e)
{
button3clicked = true;
}
private void button4_Click(object sender, EventArgs e)
{
button4clicked = true;
}
private void button5_Click(object sender, EventArgs e)
{
button5clicked = true;
}
}
}

Retrieving the File Name of a .mp3 file without the path

Reasoning:
I've seen this question duplicated a few times on this website, and each one seems to bring people to same conclusion.
Okay, so I have a music player located within a window. When the window opens, an OpenFileDialog method is ran, to where the user must pick a .mp3 file. Once done, they can play the file whilst navigating other windows in the program.
I'm trying to:
Enter the file name of the selected file into a label. With this, I want to show the file name as it is being played. I want to only show the file name, not the path to it as well.
What I've seen on duplicate questions:
Repeating fixes whereby I can use the following code to pick up the file name with or without the file extension:
label1.Content = Path.GetFileName(media.Source.ToString());
label1.Content = Path.GetFileNameWithoutExtension(media.Source.ToString());
Issue:
I've tried to enter this on my program, but I don't have the "Path" section (I'm not too sure of the actual name of this part of code).
The closest I can get to this is: class System.Windows.Shapes.Path | Draws a series of connected lines and curves.
I don't seem to have another "path" in my VS, so I'm not too sure what to do.
Code (Sorry about the code here, it was a little awkward to copy into the question box)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Microsoft.Win32;
using System.Windows.Threading;
namespace WolfAlbumCatalogue
{
/// <summary>
/// Interaction logic for MusicPlayer.xaml
/// </summary>
public partial class MusicPlayer : Window
{
private MediaPlayer mediaPlayer = new MediaPlayer();
AlbumCatalogue albumCatalogue;
public MusicPlayer(AlbumCatalogue parent)
{
InitializeComponent();
albumCatalogue = parent;
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "MP3 files (*.mp3)|*.mp3|All files(*.*)|*.*";
if (openFileDialog.ShowDialog() == true)
mediaPlayer.Open(new Uri(openFileDialog.FileName));
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(1);
timer.Tick += timer_Tick;
timer.Tick += miniTimer_Tick;
timer.Start();
albumCatalogue.img_musicPlayerWindow.IsEnabled = false;
lbl_songName.Content = Path
}
private void rec_closeHover_MouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
this.Close();
albumCatalogue.img_musicPlayerWindow.IsEnabled = true;
}
void timer_Tick(object sender, EventArgs e)
{
if (mediaPlayer.Source != null)
{
lbl_timer.Content = String.Format("{0} / {1}", mediaPlayer.Position.ToString(#"mm\:ss"), mediaPlayer.NaturalDuration.TimeSpan.ToString(#"mm\:ss"));
}
else
{
lbl_timer.Content = "No file selected...";
}
}
void miniTimer_Tick(object sender, EventArgs e)
{
if (mediaPlayer.Source != null)
{
lbl_miniTimer.Content = String.Format("{0} / {1}", mediaPlayer.Position.ToString(#"mm\:ss"), mediaPlayer.NaturalDuration.TimeSpan.ToString(#"mm\:ss"));
}
else
{
lbl_miniTimer.Content = "No file selected...";
}
}
private void btn_play_Click(object sender, RoutedEventArgs e)
{
mediaPlayer.Play();
lbl_play_pause.Content = "Playing...";
lbl_play_pause.Visibility = Visibility.Visible;
}
private void btn_pause_Click(object sender, RoutedEventArgs e)
{
mediaPlayer.Pause();
lbl_play_pause.Content = "Paused.";
lbl_play_pause.Visibility = Visibility.Visible;
}
private void btn_stop_Click(object sender, RoutedEventArgs e)
{
mediaPlayer.Stop();
lbl_play_pause.Visibility = Visibility.Hidden;
}
private void rec_titleBar_MouseDown(object sender, MouseButtonEventArgs e)
{
this.DragMove();
}
private void rec_windowBkg_MouseDown(object sender, MouseButtonEventArgs e)
{
this.DragMove();
}
private void rec_btnOpenAudioFile_MouseDown(object sender, MouseButtonEventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "MP3 files (*.mp3)|*.mp3|All files(*.*)|*.*";
if (openFileDialog.ShowDialog() == true)
mediaPlayer.Open(new Uri(openFileDialog.FileName));
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(1);
timer.Tick += timer_Tick;
timer.Start();
}
}
}
I would copy in the XAML too but I use blend animations and it's way too long for this question. If you need it, please let me know :)
That said, I think that's everything!
Thank you

Include the header System.IO in your application.
(using System.IO;) .If it is not found you need to add the reference System dll.

How to make a customized progressbar in c#

I would like to learn how to make a progressbar like the one shown in this video.
I tried to replicate it in VS C#, but I get the error:
C# Property or indexer cannot be assigned to -- it is read only
If I try using if (txProgressBar.Text.Length == 85), I will get this in the TextBox (txProgressBar)
System.Windows.Forms.TextBox, Text: System.Windows.Forms.TextBox, Text: Syst...██
Textbox Progressbar Tutorial VB 2010
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace CustomizedProgressBar
{
public partial class Form1 : Form
{
int last = 1;
public Form1()
{
InitializeComponent();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (txProgressBar.Text.Length = "85")
{
timer1.Stop();
MessageBox.Show("Counted!");
}else
{
if (last == 1)
{
txProgressBar.Text = txProgressBar + "█";
last = 2;
}
else
{
txProgressBar.Text = txProgressBar.Text + "█";
last = 1;
}
}
}
private void btnClear_Click(object sender, EventArgs e)
{
txProgressBar.Text = "";
}
private void btnStart_Click(object sender, EventArgs e)
{
timer1.Start();
}
private void btnStop_Click(object sender, EventArgs e)
{
timer1.Stop();
}
}
}

Your line:
txProgressBar.Text = txProgressBar + "█";
should be
txProgressBar.Text = txProgressBar.Text + "█"; or txProgressBar.Text &= "█";

I realized what was the problem. The txProgressBar.Text = txProgressBar + "█"; was missing the *.Text. That solved the problem and the message is shown as well.

I'm trying to use backgroundworker with webBrowser to download images but getting exception. What should i do?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.IO;
using HtmlAgilityPack;
using mshtml;
using System.Text.RegularExpressions;
namespace Extract_Images
{
public partial class Form1 : Form
{
private string[] linkstoextract;
private int numberoflinks;
private int currentLinkNumber = 0;
private string mainlink;
private WebClient client;
private WebBrowser webBrowser1;
private string htmlCode;
private bool pagesorimages = false;
public Form1()
{
InitializeComponent();
webBrowser1 = new WebBrowser();
webBrowser1.ScriptErrorsSuppressed = true;
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
label1.Text = "Number of links: ";
mainlink = "http://www.test.com/";
numberoflinks = 13;
backgroundWorker1.RunWorkerAsync();
}
private void ProcessNextLink()
{
if (currentLinkNumber < numberoflinks)
{
currentLinkNumber++;
string linktonav = mainlink + "index"+currentLinkNumber.ToString() + ".html";
pagesorimages = false;
backgroundWorker1.ReportProgress(0,currentLinkNumber);
webBrowser1.Navigate(linktonav);
}
}
int count = 0;
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
mshtml.HTMLDocument objHtmlDoc = (mshtml.HTMLDocument)webBrowser1.Document.DomDocument;
string pageSource = objHtmlDoc.documentElement.innerHTML;
List<string> links = new List<string>();
string[] hrefs = this.webBrowser1.Document.Links.Cast<HtmlElement>()
.Select(a => a.GetAttribute("href")).Where(h => h.Contains(".jpg")).ToArray();
foreach(string a in hrefs)
{
using (WebClient client = new WebClient())
{
client.DownloadFile(a, #"C:\Images\file" + count + ".jpg");
}
count ++;
pagesorimages = true;
backgroundWorker1.ReportProgress(0, count);
}
//ProcessNextLink();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
ProcessNextLink();
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
if (pagesorimages == false)
{
label1.Text = e.UserState.ToString();
}
if (pagesorimages == true)
{
label2.Text = e.UserState.ToString();
}
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
}
}
}
The exception is on the second ReportProgress:
backgroundWorker1.ReportProgress(0, count);
This operation has already had OperationCompleted called on it and further calls are illegal
What i want to do is to report first the current page number in this case it's 1 to label1.
And then to report the number of downloaded images in this page to label2.
Then to move to the next page with the method ProcessNextLink(); and again report the page number it should be 2 and then to report the number of images downloaded in page 2.
But i'm getting this exception already on the first page.
It was working fine without the backgroundworker in the event webBrowser1_DocumentCompleted i called ProcessNextLink(); in the bottom and it was working fine. But with the backgroundworker it's not working.

How can i tell the StreamWriter when writing whats in the textBox1 to separate each string after a ,?

This is my code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace Grads_Scripts
{
public partial class Form1 : Form
{
string cmd = "";
string exepath = #"C:\OpenGrADS\Contents\Cygwin\Versions\2.0.2.oga.2\i686\opengrads.exe";
private static StringBuilder cmdOutput = null;
Process cmdProcess;
StreamWriter cmdStreamWriter;
public Form1()
{
InitializeComponent();
cmd = "set xsize 650 500";
ProcessCommands();
}
private void ProcessCommands()
{
cmdOutput = new StringBuilder("");
cmdProcess = new Process();
cmdProcess.StartInfo.FileName = exepath;
cmdProcess.StartInfo.UseShellExecute = false;
cmdProcess.StartInfo.CreateNoWindow = true;
cmdProcess.StartInfo.RedirectStandardOutput = true;
cmdProcess.OutputDataReceived += new DataReceivedEventHandler(SortOutputHandler);
cmdProcess.StartInfo.RedirectStandardInput = true;
cmdProcess.Start();
cmdStreamWriter = cmdProcess.StandardInput;
cmdProcess.BeginOutputReadLine();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
cmdStreamWriter.WriteLine(textBox1.Text);
}
private void button2_Click(object sender, EventArgs e)
{
textBox2.Text = cmdOutput.ToString();
textBox2.AppendText(textBox1.Text);
}
private void button3_Click(object sender, EventArgs e)
{
cmdStreamWriter.Close();
cmdProcess.WaitForExit();
cmdProcess.Close();
}
private static void SortOutputHandler(object sendingProcess,
DataReceivedEventArgs outLine)
{
if (!String.IsNullOrEmpty(outLine.Data))
{
cmdOutput.Append(Environment.NewLine + outLine.Data);
}
}
}
}
When i type in the textBox1 a command for example: set xsize 650 500 then click the button1 to execute the command it will do this command.
But now i want to be able to type more then one command for example in the textBox1 if i will type: set xsize 650 500,clear
And then click on button1 i want it to separate the two commands the first one is set xsize 650 500 and the second command is clear i will know it by the , that separate them
So what i want to do is here:
private void button1_Click(object sender, EventArgs e)
{
cmdStreamWriter.WriteLine(textBox1.Text);
}
I click only once and it will make the first command set xsize 650 500 and then automatic right after will do the second command clear so i will not need to type every single command and click the button and then type another command and click the button but to enter batch of commands separate by , and it will execute each command automatic one by one.
By logical like a list or queue of commands and it will execute command one by one automatic.

I would use split and then loop through each string
private void button1_Click(object sender, EventArgs e)
{
string[] cmdTextParts = textBox1.Text.Split(',');
foreach (string item in cmdTextParts)
{
cmdStreamWriter.WriteLine(item);
}
}