Develop Reference

Realtime audio stream from outpud device to input device ( from system mixer to microphone )

I need to stream my OS mixer sound to the microphone. (to transfer them both via skype).
Important thing is -- I need to have ability to configure delay/latency of the stream.
(VAC) Virtual Audio Cable is not solution for me: it doesn't work in my case. I have an external USB sound device an app doesn't work for me. I have tried it. Truly.
I google it more than 2 days and found nothing.
So I want to try wrote my own app for this. Have no experience with NAudio.
At the moment all I have is:
using System;
using System.Collections.Generic;
using NAudio.Wave;
namespace SoundApp
{
public class AudioCable
{
private WaveOut _wvOut = null;
private DirectSoundOut _output = null;
private WaveIn _sourceStreamIn = null;
private WaveOut _sourceStreamOut = null;
public void InitDevices(string fromDevice, string toDevice)
{
Dispose();
_sourceStreamIn = new WaveIn();
_sourceStreamOut = new WaveOut();
_output = new DirectSoundOut();
if (fromDevice.Contains("INPUT"))
{
var tmp = fromDevice.Split('|')[0].Replace("INPUT: ", "").Trim(' ');
int tmpDeviceNumber = int.Parse(tmp);
_sourceStreamIn.DeviceNumber = tmpDeviceNumber;
}
else
{
var tmp = toDevice.Split('|')[0].Replace("OUTPUT: ", "").Trim(' ');
int tmpDeviceNumber = int.Parse(tmp);
_sourceStreamOut.DeviceNumber = tmpDeviceNumber;
}
Guid deviceGuid;
if (toDevice.Contains("INPUT"))
{
var tmp = toDevice.Split('|')[0].Replace("INPUT: ", "").Trim(' ');
int tmpDeviceNumber = int.Parse(tmp);
WaveInCapabilities deviceInfo = WaveIn.GetCapabilities(tmpDeviceNumber);
deviceGuid = deviceInfo.ManufacturerGuid;
}
else
{
var tmp = toDevice.Split('|')[0].Replace("OUTPUT: ", "").Trim(' ');
int tmpDeviceNumber = int.Parse(tmp);
WaveOutCapabilities deviceInfo = WaveOut.GetCapabilities(tmpDeviceNumber);
deviceGuid = deviceInfo.ManufacturerGuid;
}
_output = new DirectSoundOut(deviceGuid);
}
public void PlaySound()
{
WaveInProvider waveIn = null;
if (_sourceStreamIn != null)
{
waveIn = new WaveInProvider(_sourceStreamIn);
}
else if (_sourceStreamOut != null)
{
throw new Exception("Sorry, not supported right now");
//waveIn = new WaveInProvider(_sourceStreamOut);
}
_output.Init(waveIn);
_output.Play();
}
public void Dispose()
{
_sourceStreamIn = null;
_sourceStreamOut = null;
if (_output != null)
{
if (_output.PlaybackState == PlaybackState.Playing)
{
_output.Stop();
}
_output.Dispose();
_output = null;
}
}
public string[] GetAudioDevices()
{
var devices = new List<string>();
for (int i = 0; i < WaveIn.DeviceCount; i++)
{
WaveInCapabilities deviceInfo = WaveIn.GetCapabilities(i);
devices.Add($"INPUT: {i} | {deviceInfo.ProductName}");
}
for (int i = 0; i < WaveOut.DeviceCount; i++)
{
WaveOutCapabilities deviceInfo = WaveOut.GetCapabilities(i);
devices.Add($"OUTPUT: {i} | {deviceInfo.ProductName}");
}
return devices.ToArray();
}
}
}
And the form source:
namespace SoundApp
{
public partial class Form1 : Form
{
AudioCable _ac = new AudioCable();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
cBoxSource.DropDownStyle = ComboBoxStyle.DropDownList;
cBoxTarget.DropDownStyle = ComboBoxStyle.DropDownList;
cBoxSource.Items.AddRange(_ac.GetAudioDevices());
cBoxTarget.Items.AddRange(_ac.GetAudioDevices());
}
private void btnStartStop_Click(object sender, EventArgs e)
{
_ac.InitDevices(cBoxSource.SelectedItem.ToString(), cBoxTarget.SelectedItem.ToString());
_ac.PlaySound();
}
}
}
So at the first I'm trying to stream microphone to the sound output device.... And it does not work at all.
So My questions is:
There are no microphone sound and I'm do not understand why so. Code is valid and dont throw any errors.
Looks like there is no ability to stream outputDevice sound stream to the inputDevice with NAudio. Is there exist some hack for this?

c# Progressbar, Overflow returns negative value

I'm creating a backup application. I have 5 folders in different locations what needs to be copied to one backup folder. (solved via checkbox.checked)
The main issue is that some of the folders are more than 3-4GB in total (with all subfolders) Progressbar is not updated because "maxbyte" returns a negative value. (I assume int32 overflows after 2gb file copy)
(Sorry can't explain it more in details..I'm just a beginner C# programmer)
using System;
using System.ComponentModel;
using System.Linq;
using System.Windows.Forms;
using System.IO;
using memoQClientBackuTool;
namespace memoQBackupTool
{
public partial class BGWorker : Form
{
public BGWorker()
{
InitializeComponent();
}
BackgroundWorker bw;
string source = "";
string target = "";
bool isfile = false;
int filecount = 0;
int currentFileNr = 1;
string newFilename = "";
int maxbytes = 0;
public void ShowProgress(string from, string to, bool isf)
{
InitializeComponent();
source = from;
target = to;
isfile = isf;
bw = new BackgroundWorker();
bw.DoWork += new DoWorkEventHandler(bw_DoWork);
bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
bw.WorkerReportsProgress = true;
bw.WorkerSupportsCancellation = true;
GetFileData();
}
private void GetFileData()
{
if (isfile)
{
FileInfo fi = new FileInfo(source);
maxbytes = Convert.ToInt32(fi.Length);
//
//set progress bar length
//
progressBar1.Minimum = 0;
progressBar2.Minimum = 0;
progressBar1.Maximum = maxbytes;
progressBar2.Maximum = 1;
bw.RunWorkerAsync();
}
else
{
GetDirectoryInfo(source);
//
//set progress bar length
//
progressBar1.Minimum = 0;
progressBar2.Minimum = 0;
progressBar1.Maximum = maxbytes;
progressBar2.Maximum = filecount;
bw.RunWorkerAsync();
}
}
private void GetDirectoryInfo(string source)
{
string[] files = Directory.GetFiles(source);
foreach (string file in files)
{
FileInfo fi = new FileInfo(file);
maxbytes += Convert.ToInt32(fi.Length);
filecount += 1;
}
string[] folders = Directory.GetDirectories(source);
foreach (string folder in folders)
{
GetDirectoryInfo(folder);
}
}
void bw_DoWork(object sender, DoWorkEventArgs e)
{
if (isfile)
{
FileStream fs = new FileStream(source, FileMode.Open);
long FileSize = fs.Length;
FileInfo fi = new FileInfo(source);
byte[] bBuffer = new byte[(int)FileSize];
fs.Read(bBuffer, 0, (int)FileSize);
fs.Close();
UpdateLabels(fi.FullName);
newFilename = fi.Name;
try
{
FileStream fss = new FileStream(target + "\\" + newFilename, FileMode.CreateNew);
BinaryWriter biwr = new BinaryWriter(fss);
for (int i = 0; i < bBuffer.Length; i += 15000)
{
if (i + 15000 < bBuffer.Length)
{
biwr.Write(bBuffer, i, 15000);
bw.ReportProgress(15000);
}
else
{
biwr.Write(bBuffer, i, bBuffer.Length - i);
bw.ReportProgress(bBuffer.Length - i);
}
}
biwr.Close();
fss.Close();
} catch (IOException){
MessageBox.Show("Nincs olyan...");
}
}
else
{
string[] temp = source.Split('\\');
target += "\\" + temp[temp.Count() - 1];
DirectoryInfo s = new DirectoryInfo(source);
DirectoryInfo t = new DirectoryInfo(target);
CopyDirectory(s, t);
}
if (bw.CancellationPending)
{
e.Cancel = true;
return;
}
}
public void CopyDirectory(DirectoryInfo di_source, DirectoryInfo di_target)
{
if (Directory.Exists(di_target.FullName) == false)
{
Directory.CreateDirectory(di_target.FullName);
}
foreach (FileInfo fi in di_source.GetFiles())
{
newFilename = fi.Name;
FileStream fs = new FileStream(fi.FullName, FileMode.Open);
long FileSize = fs.Length;
byte[] bBuffer = new byte[(int)FileSize];
fs.Read(bBuffer, 0, (int)FileSize);
fs.Close();
UpdateLabels(fi.FullName);
if (File.Exists(di_target.ToString() + "\\" + fi.Name))
{
Random rand = new Random();
newFilename = newFilename + "_" + rand.Next(1, 10000);
}
FileStream fss = new FileStream(di_target.ToString() + "\\" + newFilename, FileMode.CreateNew);
BinaryWriter biwr = new BinaryWriter(fss);
for (int i = 0; i < bBuffer.Length; i += 500000)
{
if (i + 500000 < bBuffer.Length)
{
biwr.Write(bBuffer, i, 500000);
bw.ReportProgress(500000);
}
else
{
biwr.Write(bBuffer, i, bBuffer.Length - i);
bw.ReportProgress(bBuffer.Length - i);
}
}
biwr.Close();
fss.Close();
}
foreach (DirectoryInfo di_SourceSubDir in di_source.GetDirectories())
{
DirectoryInfo nextSubDir = di_target.CreateSubdirectory(di_SourceSubDir.Name);
CopyDirectory(di_SourceSubDir, nextSubDir);
}
}
void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value += e.ProgressPercentage;
int copied = progressBar1.Value / 1024;
int total = maxbytes / 1024;
lbl_kbscopied.Text = copied + "/" + total;
}
delegate void UpdateLabelsDelegate(string filename);
void UpdateLabels(string fname)
{
if (!InvokeRequired)
{
lbl_filename.Text = "Copying: " + fname;
lbl_filenr.Text = "File: " + currentFileNr + "/" + filecount;
currentFileNr++;
progressBar2.Value += 1;
}
else
{
Invoke(new UpdateLabelsDelegate(UpdateLabels), new object[] { fname });
}
}
private void button1_Click(object sender, EventArgs e)
{
Cursor.Current = Cursors.WaitCursor;
bw.CancelAsync();
}
private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled)
{
Cursor.Current = Cursors.Default;
CustomMsgBox.Show("The task has been canceled", "Error", "OK");
this.Close();
}
else if (e.Error != null)
{
MessageBox.Show("Error. Details: " + (e.Error as Exception).ToString());
}
else
{
this.Close();
}
}
}
}

Report progress not in absolute values, but in relative; percentage, for example.
Let say that 1MB file is 100% of progress bar. That means that you have to initialize it with 100: progressBar1.Maximum = 100. Then every 15000 bytes that were copied is a little bit more than 1%. Instead of bw.ReportProgress(15000) do bw.ReportProgress(1).

I will suggest to use long instead of int wherever you are getting total bytes copied/uploaded so far. If I understood your code you are using int in for loop where you call ReportProgress

Field is never assigned to, and will always have its default value null (CS0649)

I've been searching for answers everywhere and I can't seem to solve mine. Anyone know a solution for this? I'm getting the following errors:
Line 25: Field 'Champion_Item_List_Downloader.MainForm.championsList' is never assigned to, and will always have its default value null (CS0649)
Line 26: Field 'Champion_Item_List_Downloader.MainForm.rolesList' is never assigned to, and will always have its default value null (CS0649)
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.ComponentModel;
namespace Champion_Item_List_Downloader
{
/// <summary>
/// Description of MainForm.
/// </summary>
public partial class MainForm : Form
{
const string listFile = "Lists.txt";
private System.Collections.Generic.List<string> championsList;
private System.Collections.Generic.List<string> rolesList;
public MainForm()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
loadList(listFile);
}
public void loadList(string file){
try {
using (StreamReader r = new StreamReader(file))
{
string line;
bool isChamp = false;
while ((line = r.ReadLine()) != null)
{
if (line == #"[Champions]") {
isChamp = true;
}
if(line != #"[Champions]" && line != #"[Types]" && line != "")
{
if(isChamp == true){
championsList.Add(line);
} else {
rolesList.Add(line);
}
}
}
}
} catch (Exception) {
}
}
public void loadStringList(string file, List<string> list){
try {
using (StreamReader r = new StreamReader(file))
{
string line;
while ((line = r.ReadLine()) != null)
{
list.Add(line);
}
}
} catch (Exception) {
}
}
void Btn_DownloadClick(object sender, EventArgs e)
{
WebClient webClient = new WebClient();
progressBar.Maximum = championsList.Count * rolesList.Count;
int count = 0;
progressBar.Value = 0;
string fileName = "";
string url = "";
string path = "";
foreach (string c in championsList)
{
foreach (string r in rolesList)
{
try {
fileName = c + #"_" + r + #"_scrape.json";
url = #"http://www.lolflavor.com/champions/" + c + #"/Recommended/" + fileName;
path = #"Champions\" + c + #"\Recommended\";
Directory.CreateDirectory(path);
webClient.DownloadFile(new Uri(url), path + fileName);
count++;
progressBar.Value = count;
} catch (Exception) {
}
}
}
progressBar.Value = progressBar.Maximum;
MessageBox.Show("Download completed!\n" + count.ToString() + " item lists successfully downloaded.");
}
void MainFormLoad(object sender, System.EventArgs e)
{
throw new NotImplementedException();
}
}
}

You have not initialized your lists anywhere.
Try initializing them where they are declared:
private System.Collections.Generic.List<string> championsList = new System.Collections.Generic.List<string>();
private System.Collections.Generic.List<string> rolesList = new System.Collections.Generic.List<string>();
Or within the constructor:
private System.Collections.Generic.List<string> championsList;
private System.Collections.Generic.List<string> rolesList;
public MainForm()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
// loadList uses these lists so they should be initialized before the call to loadList to avoid a NullReferenceException.
championsList = new System.Collections.Generic.List<string>();
rolesList = new System.Collections.Generic.List<string>();
loadList(listFile);
}
Or lazily at the time they are needed:
private System.Collections.Generic.List<string> championsList;
private System.Collections.Generic.List<string> rolesList;
public void loadList(string file){
if (championsList == null) championsList = new System.Collections.Generic.List<string>();
if (rolesList == null) rolesList = new System.Collections.Generic.List<string>();
try {
using (StreamReader r = new StreamReader(file))
{
...
}
} catch (Exception) {
}
}
void Btn_DownloadClick(object sender, EventArgs e)
{
WebClient webClient = new WebClient();
if (championsList == null) championsList = new System.Collections.Generic.List<string>();
if (rolesList == null) rolesList = new System.Collections.Generic.List<string>();
progressBar.Maximum = championsList.Count * rolesList.Count;
int count = 0;
progressBar.Value = 0;
string fileName = "";
string url = "";
string path = "";
foreach (string c in championsList)
{
foreach (string r in rolesList)
{
...
}
}
progressBar.Value = progressBar.Maximum;
MessageBox.Show("Download completed!\n" + count.ToString() + " item lists successfully downloaded.");
}
P.S. because you already have using System.Collections.Generic declared, you could write it more simply as:
private List<string> championsList = new List<string>();
private List<string> rolesList = new List<string>();

There is never a call to championsList = new System.Collections.Generic.List<string>().
Thus it's never initialized

Getting client information in C#

I have an application that scans the local network for connected PC's.
I want to get the client information (IP address, MAC address, Host name...) and the connection state (download rate, upload rate), and put them in the ListView, but the problem is that this information is not constant!
How could I get this information in real time? The info in the ListView changes every time the info of the client changes?
My current code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Collections;
using System.Text;
using System.Windows.Forms;
using NetUtils;
using System.Net;
namespace WindowsFormsApplication5
{
public partial class Form1 : Form
{
private IPScanner _scanner;
private class HostSorterByIP : IComparer
{
public int Compare(object x, object y)
{
byte[] bytes1 = ((IPScanHostState)((ListViewItem)x).Tag).Address.GetAddressBytes();
byte[] bytes2 = ((IPScanHostState)((ListViewItem)y).Tag).Address.GetAddressBytes();
int i = bytes1.Length - 1;
for (; i > 0 && bytes1[i] == bytes2[i]; i--)
;
return bytes1[i] - bytes2[i];
}
}
public Form1()
{
InitializeComponent();
_scanner = new IPScanner((int)_spnConcurrentPings.Value, (int)_spnPingsPerScan.Value, _cbContinuousScan.Checked,
(int)_spnTimeout.Value, (int)_spnTTL.Value, _cbDontFragment.Checked, (int)_spnBufferSize.Value);
_scanner.OnAliveHostFound += new IPScanner.AliveHostFoundDelegate(_scanner_OnAliveHostFound);
_scanner.OnStartScan += new IPScanner.ScanStateChangeDelegate(_scanner_OnStartScan);
_scanner.OnStopScan += new IPScanner.ScanStateChangeDelegate(_scanner_OnStopScan);
_scanner.OnRestartScan +=new IPScanner.ScanStateChangeDelegate(_scanner_OnRestartScan);
_scanner.OnScanProgressUpdate +=new IPScanner.ScanProgressUpdateDelegate(_scanner_OnScanProgressUpdate);
_lvAliveHosts.ListViewItemSorter = new HostSorterByIP();
_cmbRangeType.SelectedIndex = 0;
}
private void _scanner_OnAliveHostFound(IPScanner scanner, IPScanHostState host)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanner.AliveHostFoundDelegate(_scanner_OnAliveHostFound), scanner, host);
return;
}
ListViewItem item = new ListViewItem();
item.Tag = host;
item.BackColor = Color.GreenYellow;
item.SubItems.Add(host.Address.ToString());
item.SubItems.Add("");
item.SubItems.Add("");
item.SubItems.Add("");
_lvAliveHosts.Items.Add(item);
_lvAliveHosts.Sort();
host.OnHostNameAvailable += new IPScanHostState.HostNameAvailableDelegate(host_OnHostNameAvailable);
host.OnStateChange += new IPScanHostState.StateChangeDelegate(host_OnStateChange);
if (!host.IsTesting())
{
item.ImageIndex = (int)host.QualityCategory;
item.SubItems[2].Text = host.AvgResponseTime.ToString("F02") + " ms";
item.SubItems[3].Text = ((float)(host.LossCount) / host.PingsCount).ToString("P");
item.SubItems[4].Text = host.HostName;
}
//AddLogEntry("Host [" + host.Address.ToString() + "] is alive.");
Timer newTimer = new Timer();
newTimer.Tag = item;
newTimer.Interval = 2000;
newTimer.Tick += new EventHandler(newTimer_Tick);
newTimer.Enabled = true;
}
void host_OnHostNameAvailable(IPScanHostState host)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanHostState.HostNameAvailableDelegate(host_OnHostNameAvailable), host);
return;
}
ListViewItem item = FindListViewItem(host);
if (item != null)
item.SubItems[4].Text = host.HostName;
}
private ListViewItem FindListViewItem(IPScanHostState host)
{
foreach (ListViewItem item in _lvAliveHosts.Items)
{
if (item.Tag == host)
return item;
}
return null;
}
private void host_OnStateChange(IPScanHostState host, IPScanHostState.State oldState)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanHostState.StateChangeDelegate(host_OnStateChange), host, oldState);
return;
}
if (!host.IsTesting())
{
ListViewItem item = FindListViewItem(host);
if (item != null)
{
if (host.IsAlive())
{
item.ImageIndex = (int)host.QualityCategory;
item.SubItems[2].Text = host.AvgResponseTime.ToString("F02") + " ms";
item.SubItems[3].Text = ((float)(host.LossCount) / host.PingsCount).ToString("P");
}
else
{
//AddLogEntry("Host [" + host.Address.ToString() + "] died.");
host.OnStateChange -= host_OnStateChange;
host.OnHostNameAvailable -= host_OnHostNameAvailable;
item.BackColor = Color.IndianRed;
Timer removeTimer = new Timer();
removeTimer.Tag = item;
removeTimer.Interval = 2000;
removeTimer.Tick += new EventHandler(removeTimer_Tick);
removeTimer.Enabled = true;
}
}
}
}
void newTimer_Tick(object sender, EventArgs e)
{
Timer timer = (Timer)sender;
timer.Stop();
timer.Tick -= newTimer_Tick;
ListViewItem item = (ListViewItem)timer.Tag;
item.BackColor = Color.White;
}
void removeTimer_Tick(object sender, EventArgs e)
{
Timer timer = (Timer)sender;
timer.Stop();
timer.Tick -= newTimer_Tick;
ListViewItem item = (ListViewItem)timer.Tag;
_lvAliveHosts.Items.Remove(item);
}
private void _scanner_OnStartScan(IPScanner scanner)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanner.ScanStateChangeDelegate(_scanner_OnStartScan), scanner);
return;
}
foreach (ListViewItem item in _lvAliveHosts.Items)
{
((IPScanHostState)item.Tag).OnStateChange -= host_OnStateChange;
((IPScanHostState)item.Tag).OnHostNameAvailable -= host_OnHostNameAvailable;
}
_lvAliveHosts.Items.Clear();
_prgScanProgress.Value = 0;
EnableSettings(false);
}
private void EnableSettings(bool enable)
{
_cmbRangeType.Enabled = _tbRangeStart.Enabled = _tbRangeEnd.Enabled = _spnTimeout.Enabled = _spnTTL.Enabled = _spnBufferSize.Enabled = _cbDontFragment.Enabled =
_spnConcurrentPings.Enabled = _spnPingsPerScan.Enabled = _cbContinuousScan.Enabled = enable;
_btnStartStop.Text = enable ? "&Start" : "&Stop";
if (enable)
_prgScanProgress.Text = "Scanner is not running!";
}
private void _btnStartStop_Click(object sender, EventArgs e)
{
if (!_scanner.Active)
{
try
{
_scanner.Start(_cmbRangeType.SelectedIndex == 0
? new IPScanRange(IPAddress.Parse(_tbRangeStart.Text), IPAddress.Parse(_tbRangeEnd.Text))
: new IPScanRange(IPAddress.Parse(_tbRangeStart.Text), int.Parse(_tbRangeEnd.Text)));
}
catch (FormatException)
{
MessageBox.Show(this, "Cannot parse IP range or subnetmask!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
_scanner.Stop(false);
}
private void _scanner_OnStopScan(IPScanner scanner)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanner.ScanStateChangeDelegate(_scanner_OnStopScan), scanner);
return;
}
EnableSettings(true);
_prgScanProgress.Value = 0;
}
void _scanner_OnRestartScan(IPScanner scanner)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanner.ScanStateChangeDelegate(_scanner_OnRestartScan), scanner);
return;
}
_prgScanProgress.Value = 0;
}
void _scanner_OnScanProgressUpdate(IPScanner scanner, IPAddress currentAddress, ulong progress, ulong total)
{
if (InvokeRequired)
{
BeginInvoke(new IPScanner.ScanProgressUpdateDelegate(_scanner_OnScanProgressUpdate), scanner, currentAddress, progress, total);
return;
}
int prog = (int)((100 * progress) / total);
_prgScanProgress.Value = prog;
_prgScanProgress.Text = prog.ToString() + "%" + " [" + currentAddress.ToString() + "]";
}
private void _cmbRangeType_SelectedIndexChanged(object sender, EventArgs e)
{
if (_cmbRangeType.SelectedIndex == 0)
{
_lRangeSep.Text = "-";
_lRangeEnd.Text = "Range &End:";
_tbRangeEnd.Size = new Size(130, _tbRangeEnd.Size.Height);
}
else
{
_lRangeSep.Text = "/";
_lRangeEnd.Text = "Subnet &Mask:";
_tbRangeEnd.Size = new Size(32, _tbRangeEnd.Size.Height);
}
}
//private void _lvAliveHosts_DoubleClick(object sender, EventArgs e) { _btnAddHost_Click(sender, e); }
private void IPScanForm_FormClosing(object sender, FormClosingEventArgs e) { _scanner.Stop(true); }
private ListViewItem.ListViewSubItem _activeTooltipSubitem = null;
private static string[] QualityCategoryNames = { "Very Poor", "Poor", "Fair", "Good", "Very Good", "Excellent", "Perfect" };
private void _lvAliveHosts_MouseMove(object sender, MouseEventArgs e)
{
ListViewItem item = _lvAliveHosts.HitTest(e.Location).Item;
if (item != null)
{
ListViewItem.ListViewSubItem subitem = _lvAliveHosts.HitTest(e.Location).SubItem;
if (subitem != null && item.SubItems.IndexOf(subitem) == 0)
{
if (_activeTooltipSubitem != subitem)
{
_ttQuality.Show("Quality: " + QualityCategoryNames[item.ImageIndex], _lvAliveHosts, item.SubItems[1].Bounds.X, subitem.Bounds.Y);
_activeTooltipSubitem = subitem;
}
return;
}
}
_activeTooltipSubitem = null;
_ttQuality.Hide(_lvAliveHosts);
}
}
}

I would create the list of clients and show them in the listview.
Than, in a background thread, every X seconds, poll all of the current clients.
Next , compare the list of updated clients to a list of clients from last update.
What remain to do is to add any new client to the list, and remove any client which no longer exists.
Pay attention to the context, use InvokeRequired() to get access to the UI control from the background thread.
EDIT:
here is how to run a background thread:
static void Main(string[] args)
{
Thread worker = new Thread(DoBackgroundWork);
}
public static void DoBackgroundWork()
{
while (true)
{
//Sleep 10 seconds
Thread.Sleep(10000);
//Do some work and than post to the control using Invoke()
}
}

How to write a Text file from this Output

I have the following code so that I can search directories to find files. Now I want to add a way for users to Save the output to a text file?
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
namespace RecursiveSearchCS
{
public class Form1 : System.Windows.Forms.Form
{
internal System.Windows.Forms.Button btnSearch;
internal System.Windows.Forms.TextBox txtFile;
internal System.Windows.Forms.Label lblFile;
internal System.Windows.Forms.Label lblDirectory;
internal System.Windows.Forms.ListBox lstFilesFound;
internal System.Windows.Forms.ComboBox cboDirectory;
private System.ComponentModel.Container components = null;
public Form1()
{
InitializeComponent();
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
private void InitializeComponent()
{
this.btnSearch = new System.Windows.Forms.Button();
this.txtFile = new System.Windows.Forms.TextBox();
this.lblFile = new System.Windows.Forms.Label();
this.lblDirectory = new System.Windows.Forms.Label();
this.lstFilesFound = new System.Windows.Forms.ListBox();
this.cboDirectory = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// btnSearch
//
this.btnSearch.Location = new System.Drawing.Point(608, 248);
this.btnSearch.Name = "btnSearch";
this.btnSearch.Size = new System.Drawing.Size(75, 23);
this.btnSearch.TabIndex = 0;
this.btnSearch.Text = "Search";
this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
//
// txtFile
//
this.txtFile.Location = new System.Drawing.Point(8, 40);
this.txtFile.Name = "txtFile";
this.txtFile.Size = new System.Drawing.Size(120, 20);
this.txtFile.TabIndex = 4;
this.txtFile.Text = "*.*";
//
// lblFile
//
this.lblFile.Location = new System.Drawing.Point(8, 16);
this.lblFile.Name = "lblFile";
this.lblFile.Size = new System.Drawing.Size(144, 16);
this.lblFile.TabIndex = 5;
this.lblFile.Text = "Search for files containing:";
//
// lblDirectory
//
this.lblDirectory.Location = new System.Drawing.Point(8, 96);
this.lblDirectory.Name = "lblDirectory";
this.lblDirectory.Size = new System.Drawing.Size(120, 23);
this.lblDirectory.TabIndex = 3;
this.lblDirectory.Text = "Look In:";
//
// lstFilesFound
//
this.lstFilesFound.Location = new System.Drawing.Point(152, 8);
this.lstFilesFound.Name = "lstFilesFound";
this.lstFilesFound.Size = new System.Drawing.Size(528, 225);
this.lstFilesFound.TabIndex = 1;
//
// cboDirectory
//
this.cboDirectory.DropDownWidth = 112;
this.cboDirectory.Location = new System.Drawing.Point(8, 128);
this.cboDirectory.Name = "cboDirectory";
this.cboDirectory.Size = new System.Drawing.Size(120, 21);
this.cboDirectory.TabIndex = 2;
this.cboDirectory.Text = "ComboBox1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(688, 277);
this.Controls.Add(this.btnSearch);
this.Controls.Add(this.txtFile);
this.Controls.Add(this.lblFile);
this.Controls.Add(this.lblDirectory);
this.Controls.Add(this.lstFilesFound);
this.Controls.Add(this.cboDirectory);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
/// <summary>
/// The main entry point for the application
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void btnSearch_Click(object sender, System.EventArgs e)
{
lstFilesFound.Items.Clear();
txtFile.Enabled = false;
cboDirectory.Enabled = false;
btnSearch.Text = "Searching...";
this.Cursor = Cursors.WaitCursor;
Application.DoEvents();
DirSearch(cboDirectory.Text);
btnSearch.Text = "Search";
this.Cursor = Cursors.Default;
txtFile.Enabled = true;
cboDirectory.Enabled = true;
}
private void Form1_Load(object sender, System.EventArgs e)
{
cboDirectory.Items.Clear();
foreach (string s in Directory.GetLogicalDrives())
{
cboDirectory.Items.Add(s);
}
cboDirectory.Text = "C:\\";
}
void DirSearch(string sDir)
{
try
{
foreach (string d in Directory.GetDirectories(sDir))
{
foreach (string f in Directory.GetFiles(d, txtFile.Text))
{
lstFilesFound.Items.Add(f);
}
DirSearch(d);
}
}
catch (System.Exception excpt)
{
Console.WriteLine(excpt.Message);
}
}
}
}
Here is also a screenshot of the Application Open:
Open Application Image
I am going to add a save button which saves to a specific location when clicked, how would I go about doing this.

If I am understanding it correctly, use a simple I/O operation.
using(StreamWriter writer = new StreamWriter("debug.txt", true))
{
foreach (string item in lstFilesFound.Items)
{
writer.WriteLine(item.ToString());
}
}
Few extra pointers:
In DirSearch, create a variable for Directory.GetDirectories(sDir). Your present code is causing this thing to calculate in every loop. Look for some more similar refactoring code in other areas.
var dirs = Directory.GetDirectories(sDir);
foreach (string d in dirs)
{
var files = Directory.GetFiles(d, txtFile.Text);
foreach (string f in files)
{
lstFilesFound.Items.Add(f);
}
DirSearch(d);
}
Hope it helps.

I'm assuming it's the list of found files you're wanting to save to a text file, how about this on your save event (rough code so not extensively tested)?
using (FileStream fs = new FileStream("c:\\files.txt", FileMode.Create, FileAccess.Write))
{
using (StreamWriter sw = new StreamWriter(fs))
{
foreach (string item in lstFilesFound.Items)
{
sw.WriteLine(item);
}
}
}