Develop Reference

How to load paths into ListBox and afterwards start the file per selected Index

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void cmdAdd_Click(object sender, EventArgs e)
{
OpenFileDialog OP = new OpenFileDialog();
OP.Title = "Please select the wanted .exe";
string FileName = String.Empty;
string PathName = String.Empty;
OP.InitialDirectory = #"C:\Users\" + Environment.UserName.ToString() + #"\Desktop";
OP.DefaultExt = ".exe";
OP.Filter = "Game executable (*.exe) |*.exe";
DialogResult Ergebnis = OP.ShowDialog();
if (Ergebnis == DialogResult.OK)
{
FileInfo File = new FileInfo(OP.FileName);
if (File.Exists)
{
PathName = File.FullName;
}
}
if (PathName != String.Empty)
{
textBox1.Text = PathName;
listBox1.Items.Add(PathName);
}
}
private void cmdStart_Click(object sender, EventArgs e)
{
string SelectedItem = "";
if (listBox1.SelectedItem != null)
{
SelectedItem = listBox1.SelectedItem.ToString();
/*MessageBox.Show(SelectedItem);*/
}
Process Pro = new Process();
Pro.StartInfo.FileName = SelectedItem;
DialogResult Ergebnis2 = MessageBox.Show("Would you like to start the Game right now?", "Game start?", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (Ergebnis2.Equals(true))
{
try
{
Pro.Start();
}
catch (Exception)
{
MessageBox.Show("The Start of the Program was aborted!\r\nOr you didn't specify the right Path!", "Warning!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
private void cmdSave_Click(object sender, EventArgs e)
{
StreamWriter SaveFile = new StreamWriter(#"C:\Users\" + Environment.UserName.ToString() + #"\Desktop\savedgames.txt");
foreach (var item in listBox1.Items)
{
SaveFile.WriteLine(item.ToString());
}
SaveFile.Close();
MessageBox.Show("EZPZ");
}
private void cmdLoad_Click(object sender, EventArgs e)
{
StreamReader sr = new StreamReader(#"C:\Users\" + Environment.UserName.ToString() + #"\Desktop\savedgames.txt");
string line = string.Empty;
try
{
line = sr.ReadLine();
while (line != null)
{
this.listBox1.Items.Add(line);
line = sr.ReadLine();
}
sr.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
finally
{
sr.Close();
}
}
}
Hello Stackoverflow-Community,
So i've tried to be able to start the selected File(from the Listbox) by clicking the Start button.The items in the Listbox are loaded in from a .txt-File, But it seems that the path that i get (from the .txt-File) is not actually the same that was written inside.
For example: H:\Exe\556689600.exe is written inside the .txt-File but when i check while pausing the application the value of the SelectedItem is "H:(two backslashes)Exe(two backslashes)556689600.exe" so i'd like it to be H:\Exe\556689600.exe so it can be properly started.
EDIT: The main problem is that i can't start the .exe that i selected (via cmdStart) and i don't know why.
Please keep in mind that i'm (as you can see from the code) not very experienced in programming and that i'm not an native english speaker, so pardon me for any grammatical mistakes/logic mistakes made.
Thanks in advance,
Stephen

The problem is with:
DialogResult Ergebnis2 = MessageBox.Show("Would you like to start the Game right now?", "Game start?", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (Ergebnis2.Equals(true))
DialogResult holds the Enum data 'DialogResult.Yes', so you need to compare it to that value, and not (true).
Edit:
I suggest practicing working with debug:
In this case, I plated a breakpoint on the 'cmdstart_Click' method and followed it step by step (Used F10)
I saw that we jump over the 'if' condition, and checked why.

C# How to get full path of network file?

This program is ran from the context menu after right clicking on a pdf file, it simply adds "\ CALL OFF" to the selected file, locally the program works fine, even with spaces. When ran on a file on my nas in which the path contains spaces the output from GetCommandLineArgs stops at the first space.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string[] args = System.Environment.GetCommandLineArgs();
textBox1.Text = args[1];
}
private void button2_Click(object sender, EventArgs e)
{
ProcessStartInfo start = new ProcessStartInfo();
start.Arguments = "-add-text \"/ CALL OFF\" -font \"Helvetica-Bold\" -font-size 14 -pos-left \"194 776\" " + textBox1.Text + " -o out.pdf";
start.FileName = "cpdf";
Process.Start(start);
}
}

String Join all the command line arguments back together, using space as separator, into one string and use that as the argument. You'll also need to add double-quotes around the textBox1.Text when used in start.Arguments to ensure it is received as one:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string[] args = System.Environment.GetCommandLineArgs().Skip(1).ToArray();
textBox1.Text = String.Join(" ", args);
}
private void button2_Click(object sender, EventArgs e)
{
ProcessStartInfo start = new ProcessStartInfo();
start.Arguments = "-add-text \"/ CALL OFF\" -font \"Helvetica-Bold\" -font-size 14 -pos-left \"194 776\" "
+ "\"" + textBox1.Text + "\"" + " -o out.pdf";
start.FileName = "cpdf";
Process.Start(start);
}
}

You need to enclose the path name in quotes, you add \":
string quoted = "\"" + textBox1.Text + "\"";
to get:
start.Arguments = "-add-text \"/ CALL OFF\" -font \"Helvetica-Bold\" -font-size 14 -pos-left \"194 776\" \"" + textBox1.Text + "\" -o out.pdf";
If you are passing it as a command line argument to the program then you need to quote it there as well:
myExe -file "Long path with spaces\file.pdf"

Can't Close SerialPort, arduino sending with 200hz data to serial monitor

Halllo
I have made my first project and it works, well sort of, I can not get it to close serial port.
I am running 200hz in the Serialmonitor and the save funktion works perfect.
I suspect that it attempts to read data while I am trying to close the port.
It does not come up with an error but hanging in the debugger trying to close the port.
MY CODE IN VISUAL STUDIO 2015:
using System;
using System.Windows.Forms;
using System.IO.Ports;
namespace Arduino_Serial
{
public partial class Form1 : Form
{
private SerialPort myport;
private DateTime datetime;
private string in_data1;
private int runtime_sec = 0;
private float runtime_milis = 0;
public Form1()
{
InitializeComponent();
}
private void Start_Click_1(object sender, EventArgs e)
{
myport = new SerialPort();
myport.BaudRate = 115200;
myport.PortName = Port_name_tb.Text;
myport.Parity = Parity.None;
myport.DataBits = 8;
myport.StopBits = StopBits.One;
myport.DataReceived += Myport_DataReceived;
try
{
myport.Open();
timer2.Enabled = true;
timer1.Enabled = true;
Data_tb.Text = "\"Arduino\"" + "\n";
Data_tb.AppendText("Time" + "\t" + "Raw_data" + "\t" + "MAP" + "\n");
Data_tb.AppendText("Sec " + "\t" + "Raw_data" + "\t" + "KPA" + "\n");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error");
}
}
void Myport_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
in_data1 = myport.ReadLine();
Invoke(new EventHandler(displaydata_event));
}
private void displaydata_event(object sender, EventArgs e)
{
datetime = DateTime.Now;
string time = datetime.Hour + ":" + datetime.Minute + ":" + datetime.Second;
Data_tb.AppendText(("\n")+ (runtime_milis) + ("\t")+ in_data1 );
}
private void Stop_bt_Click(object sender, EventArgs e)
{
try
{
myport.ReadTimeout = 1000000000;
myport.Close();
timer2.Enabled = false;
timer1.Enabled = false;
runtime_milis = 0;
runtime_sec = 0;
}
catch (Exception ex2)
{
MessageBox.Show(ex2.Message, "Error");
}
}
private void Save_bt_Click(object sender, EventArgs e)
{
try
{
datetime = DateTime.Now;
String time = datetime.Year + "-"+ datetime.Month + "-"+ datetime.Day + "_" + datetime.Hour + "." + datetime.Minute + "." + datetime.Second;
string pathfile = #"C:\DATA\";
string filename = "Arduino_" + time + ".msl";
System.IO.File.WriteAllText(pathfile + filename, Data_tb.Text);
MessageBox.Show("Data has been saved");
Close();
}
catch (Exception ex3)
{
MessageBox.Show(ex3.Message, "Error");
}
}
private void timer1_Tick(object sender, EventArgs e)
{
runtime_sec++;
}
private void timer2_Tick(object sender, EventArgs e)
{
runtime_milis++;
}
}
}

Why doesn't my disconnect button work?

I am working on this GUI for serial port application. I recently added stop and wait protocols to the application. Surprisingly my disconnect button stopped working. I have thought through the logic and I have not been able to find the problem.
namespace WindowsFormsApplication5
{
public partial class Form1 : Form
{
public bool packetreceived = false;
private SerialPort sp = null; //<---- serial port at form level
public delegate void AddDataDelegate(String myString);
public AddDataDelegate myDelegate;
//delegate variable to disconnect
public AddDataDelegate disconnectDelegate = null;
public void AddDataMethod(String myString)
{
richTextBox1.AppendText(myString);
}
/**
* Takes byte array and returns a string representation
*
*/
public String parseUARTData(byte[] data)
{
if (data.Length == 11)
{
String rv = "";
DataFields d = new DataFields();
if (!packetreceived)
{
d = mainLogic.parseData(data);
packetreceived = true;
}
//TODO
System.Threading.Thread.Sleep(5000);
if (d.sequence == 0)
{
sp.Write("1\r\n");
}
else
{
sp.Write("0\r\n");
}
packetreceived = false;
//now display it as a string
rv += STR_OPCODE + " = " + d.opcode + "\n";
rv += STR_CRC + " = " + d.crc + "\n";
rv += STR_SEQ + " = " + d.sequence + "\n";
rv += STR_FLAGS + " = " + d.flags + "\n";
rv += STR_TEMP + " = " + d.temperature + "\n";
rv += STR_HUMID + " = " + d.humidity + "\n";
rv += STR_PH + " = " + d.ph + "\n";
return rv + "\n\n";
}
else
{
return Encoding.ASCII.GetString(data);
}
}
private void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
string s = sp.ReadExisting();
if (disconnectDelegate != null)
{
disconnectDelegate.Invoke(s);
}
richTextBox1.Invoke(this.myDelegate, new Object[] { parseUARTData(Encoding.ASCII.GetBytes(s)) });
}
private void button1_Click(object sender, EventArgs e)
{
connect.Enabled = false;
try
{
// open port if not already open
// Note: exception occurs if Open when already open.
if (!sp.IsOpen)
{
//sp.PortName = this.comboBox1.SelectedItem.ToString();
sp.Open();
}
// send data to port
sp.Write("####,###########\r\n");
disconnect.Enabled = true;
}
catch (Exception)
{
// report exception to user
Console.WriteLine(e.ToString());
}
}
private void button2_Click(object sender, EventArgs e)
{
connect.Enabled = true;
try
{
// open port if not already open
// Note: exception occurs if Open when already open.
if (sp.IsOpen)
{
// send data to port
sp.Write("+++\r\n");
//add the delegate
disconnectDelegate = new AddDataDelegate(onDisconnect);
//sp.WriteTimeout = 500;
// sp.Write("####,0\r\n");
}
}
catch (Exception)
{
Console.WriteLine(e.ToString());
}
finally
{
disconnect.Enabled = false;
}
}
public void OnApplicationExit(object sender, EventArgs e)
{
sp.Close();
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
//foreach (string port in ports)
//{
// comboBoxSerialPorts.Items.Add(port);
//}
}
private void onDisconnect(string msg)
{
string trimmedMsg = msg.Trim();
if (trimmedMsg.Equals("OK"))
{
//send the second time
sp.Write("##,0\r\n");
//null the object
disconnectDelegate = null;
}
}
private void comPort_Click(object sender, EventArgs e)
{
try
{
if (sp.IsOpen)
{
//send data to port
sp.Write("1\r\n");
MessageBox.Show("bluetooth is transmitting data...");
//message box telling user that you are asking for data.
}
}
catch (Exception)
{
// report exception to user
Console.WriteLine(e.ToString());
}
}

Can't access file

I can't seem to get access to the file I'm working with in the program I'm writing. I'm not sure how exactly to work this since I want my program to open a file of your choice, which it does, then I want it to be able to take in info into an arrary, which it does, then from there, write that information from the array to the file you opened up. When I try some code to start working on it it tells me, "The process cannot access the file 'file' because it is being used by another process." Here is what I have so far. Please let me know. Thank you. The problematic areas is the Save_Click section of the code where I wrote "This is a test" Thanks.
public partial class ListingSearch : Form
{
string line;
DialogResult result;
string fileName;
int i = 0;
string[] first = new string[100];
string[] last = new string [100];
string[] phone = new string [100];
string[] grade = new string [100];
public ListingSearch()
{
InitializeComponent();
MessageBox.Show("Please be sure to open a file before beginning");
}
private void OpenFile_Click(object sender, EventArgs e)
{
using (OpenFileDialog filechooser = new OpenFileDialog())
{
result = filechooser.ShowDialog();
fileName = filechooser.FileName;
System.IO.StreamReader file =
new System.IO.StreamReader(fileName);
while ((line = file.ReadLine()) != null)
{
string[] words = File.ReadAllText(fileName).Split(new string[] { "\n", "\r\n", ":" }, StringSplitOptions.RemoveEmptyEntries);
//firstName.Text = words[4];
//lastName.Text = words[5];
//telephone.Text = words[6];
//GPA.Text = words[7];
}
Read.Enabled = true;
}
}
private void Save_Click(object sender, EventArgs e)
{
File.AppendAllText(fileName, "This is a test");
}
private void Read_Click(object sender, EventArgs e)
{
MessageBox.Show(fileName);
MessageBox.Show(File.ReadAllText(fileName));
}
private void info_Click(object sender, EventArgs e)
{
first[i] = firstName.Text;
firstName.Text = " ";
last[i] = lastName.Text;
lastName.Text = " ";
phone[i] = telephone.Text;
telephone.Text = " ";
grade[i] = GPA.Text;
GPA.Text = " ";
i++;
}
private void displayinfo_Click(object sender, EventArgs e)
{
if (i == 0)
MessageBox.Show("Nothing to display!");
else
for (int j = 0; j < i; j++)
{
MessageBox.Show(first[j] + " " + last[j] + "\r" + phone[j] + "\r" + grade[j]);
}
}

You get error here
File.ReadAllText(fileName)
because you open same file before it here
System.IO.StreamReader file = new System.IO.StreamReader(fileName);

You need to close the file after you are finished reading it. Also, not sure why you are opening the file at all, since you subsequently use File.ReadAllText which will handle opening and closing the file all on its own.
Seems like your OpenFile_click event should just look like this:
using (OpenFileDialog filechooser = new OpenFileDialog())
{
result = filechooser.ShowDialog();
fileName = filechooser.FileName;
string[] words = File.ReadAllText(fileName).Split(new string[] { "\n", "\r\n", ":" }, StringSplitOptions.RemoveEmptyEntries);
Read.Enabled = true;
}

You haven't closed your StreamReader. C# will lock the file until you do. Or you could use a StreamWriter after you closed your StreamReader