Visual studio 2010- Application as a service in release mode - c#

I have an desktop console application created in visual studio 2010.How do i convert it to windows service?. basically in debug mode i want it as normal app , but in release mode i want a service build output

You can do it this way:
namespace Program
{
static class Program
{
public static bool Stopped = false;
[STAThread]
static void Main(string[] args)
{
Interactive.Initialize();
Interactive.OnStopped += new Interactive.StopedDelegate(OnStopped);
Interactive.Title = Path.GetFileNameWithoutExtension(
Assembly.GetExecutingAssembly().Location);
if (args.Length == 0) Interactive.Run(RunProc);
else if (args[0] == "-svc") ServiceBase.Run(new Service());
}
public static void RunProc() { yourConsoleMain(); }
public static void OnStopped() { Stopped = true; exitFromMain(); }
}
public class Service : ServiceBase
{
public static string Name = Path.GetFileNameWithoutExtension(
Assembly.GetExecutingAssembly().Location);
public static string CmdLineSwitch = "-svc";
public static ServiceStartMode StartMode = ServiceStartMode.Automatic;
public static bool DesktopInteract = true;
public bool Stopped = false;
public Service() { ServiceName = Name; }
public void Start() { OnStart(null); }
protected override void OnStart(string[] args)
{
System.Diagnostics.EventLog.WriteEntry(
ServiceName, ServiceName + " service started.");
Thread thread = new Thread(MainThread);
thread.Start();
}
protected override void OnStop()
{
System.Diagnostics.EventLog.WriteEntry(
ServiceName, ServiceName + " service stopped.");
Stopped = true;
Application.Exit();
}
private void MainThread()
{
Interactive.Run(Program.RunProc);
if (!Stopped) Stop();
}
}
}
Let me explain this... Basically, in Main you define that your program starts as a service if it is started with argument '-svc'.
Put in RunProc() what you normally do in main(), and in OnStopped() event handler some code that will cause main() to exit.
Then, override ServiceBase and perform some basic start/stop service.
In Windows 7 and later you must explicitly define that your service can interact with desktop if you want to see some output. But there is another problem, console window cannot be shown. So I created this console simulator which can write and also read input.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Runtime.InteropServices;
namespace ProgramIO.Control
{
public delegate void WriteDelegate(string value, int x, int y);
public delegate void ReadDelegate(out string value, bool readLine);
public delegate void EnableInputDelegate(bool enable);
public partial class InteractiveForm : Form
{
private delegate void ClearInputBufferDelegate();
public enum EIOOperation { None = 0, Write, Read }
private EventWaitHandle eventInvoke =
new EventWaitHandle(false, EventResetMode.AutoReset);
private EventWaitHandle eventInput =
new EventWaitHandle(false, EventResetMode.AutoReset);
private bool readLine = false;
private string inputBuffer = "";
private int inputPosition = 0;
private int inputBufferPosition = 0;
private EIOOperation IOOperation;
private int bufferSize = 0x10000;
private bool CaretShown = false;
private delegate object DoInvokeDelegate(Delegate method, params object[] args);
private delegate void SetTitleDelegate(string value);
private delegate void SetForegroundcolorDelegate(Color value);
public string Title {
get { return Text; }
set {
if (InvokeRequired) InvokeEx(
(SetTitleDelegate)delegate(string title) { Text = title; },
1000, new object[] { value });
else Text = value; }}
public Color ForegroundColor {
get { return ForeColor; }
set {
if (InvokeRequired) InvokeEx(
(SetForegroundcolorDelegate)delegate(Color color) { ForeColor = color; },
1000, new object[] { value });
else ForeColor = value; }}
public InteractiveForm()
{
InitializeComponent();
DoubleBuffered = true;
}
#region Asynchronous Methods
private bool InvokeEx(Delegate method, int timeout, params object[] args)
{
BeginInvoke((DoInvokeDelegate)DoInvoke, new object[] { method, args });
if (eventInvoke.WaitOne(timeout)) return true;
else return false;
}
private void EnableInput(bool enable)
{
if (InvokeRequired)
InvokeEx((EnableInputDelegate)DoEnableInput, 1000, new object[] { enable });
else DoEnableInput(enable);
}
private void ClearInputBuffer()
{
if (InvokeRequired)
InvokeEx((ClearInputBufferDelegate)DoClearInputBuffer, 1000, new object[0]);
else DoClearInputBuffer();
}
public void Write(string value, int x = -1, int y = -1)
{
lock (this) {
IOOperation = EIOOperation.Write;
if (InvokeRequired)
InvokeEx((WriteDelegate)DoWrite, 1000, new object[] { value, x, y });
else DoWrite(value, x, y);
IOOperation = EIOOperation.None; }
}
public string Read(bool readLine)
{
lock (this) {
EnableInput(true);
IOOperation = EIOOperation.Read; this.readLine = readLine; string value = "";
ClearInputBuffer(); eventInput.WaitOne();
object[] args = new object[] { value, readLine };
if (InvokeRequired) {
InvokeEx((ReadDelegate)DoRead, 1000, args); value = (string) args[0]; }
else DoRead(out value, readLine);
//inputPosition = textBox.Text.Length; inputBuffer = "";
ClearInputBuffer();
IOOperation = EIOOperation.None;
EnableInput(false);
return value;
}
}
#endregion //Asynchronous Methods
#region Synchronous Methods
protected override void OnShown(EventArgs e) { base.OnShown(e); textBox.Focus(); }
public object DoInvoke(Delegate method, params object[] args)
{
object obj = method.DynamicInvoke(args);
eventInvoke.Set();
return obj;
}
private void CorrectSelection()
{
if (textBox.SelectionStart < inputPosition) {
if (textBox.SelectionLength > (inputPosition - textBox.SelectionStart))
textBox.SelectionLength -= inputPosition - textBox.SelectionStart;
else textBox.SelectionLength = 0;
textBox.SelectionStart = inputPosition; }
}
protected void DoClearInputBuffer()
{
inputPosition = textBox.Text.Length; inputBuffer = "";
}
protected void DoEnableInput(bool enable)
{
if (enable) { textBox.ReadOnly = false; textBox.SetCaret(true); }
else { textBox.ReadOnly = true; textBox.SetCaret(false); }
}
protected void DoWrite(string value, int x, int y)
{
string[] lines = textBox.Text.Split(new string[] { "\r\n" }, StringSplitOptions.None);
string[] addLines = new string[0];
if (y == -1) y = lines.Length - 1;
if (lines.Length - 1 < y) addLines = new string[y - lines.Length - 1];
if (y < lines.Length) {
if (x == -1) x = lines[y].Length;
if (lines[y].Length < x)
lines[y] += new String(' ', x - lines[y].Length) + value;
else
lines[y] = lines[y].Substring(0, x) + value +
((x + value.Length) < lines[y].Length ?
lines[y].Substring(x + value.Length) : ""); }
else {
y -= lines.Length;
if (x == -1) x = addLines[y].Length;
addLines[y] += new String(' ', x - addLines[y].Length) + value; }
textBox.Text = (string.Join("\r\n", lines) +
(addLines.Length > 0 ? "\r\n" : "") + string.Join("\r\n", addLines));
textBox.Select(textBox.Text.Length, 0); textBox.ScrollToCaret();
inputBuffer = "";
}
protected void DoRead(out string value, bool readLine)
{
value = "";
if (readLine) {
int count = inputBuffer.IndexOf("\r\n");
if (count > 0) { value = inputBuffer.Substring(0, count); }}
else if (inputBuffer.Length > 0) {
value = inputBuffer.Substring(0, 1); }
inputBuffer = "";
}
private void textBox_TextChanged(object sender, EventArgs e)
{
if (IOOperation == EIOOperation.Read) {
inputBuffer = textBox.Text.Substring(inputPosition);
if (!readLine || inputBuffer.Contains("\r\n")) eventInput.Set(); }
if (textBox.Text.Length > bufferSize) { textBox.Text =
textBox.Text.Substring(textBox.Text.Length - bufferSize, bufferSize);
textBox.Select(textBox.Text.Length, 0); textBox.ScrollToCaret(); }
}
private void textBox_KeyDown(object sender, KeyEventArgs e)
{
if (IOOperation != EIOOperation.Read ||
(e.KeyCode == Keys.Back && inputBuffer.Length == 0))
e.SuppressKeyPress = true;
}
private void textBox_MouseUp(object sender, MouseEventArgs e)
{
CorrectSelection();
}
private void textBox_KeyUp(object sender, KeyEventArgs e)
{
if (!(IOOperation == EIOOperation.Read) ||
((e.KeyCode == Keys.Left || e.KeyCode == Keys.Up) &&
textBox.SelectionStart < inputPosition))
CorrectSelection();
}
private void InteractiveForm_FormClosing(object sender, FormClosingEventArgs e)
{
eventInput.Set();
lock (this) { }
}
#endregion //Synchronous Methods
}
public class InteractiveWindow : TextBox
{
[DllImport("user32.dll")]
static extern bool HideCaret(IntPtr hWnd);
[DllImport("user32.dll")]
static extern bool ShowCaret(IntPtr hWnd);
private delegate void SetCaretDelegate(bool visible);
private const int WM_SETFOCUS = 0x0007;
private bool CaretVisible = true;
public void SetCaret(bool visible)
{
if (InvokeRequired) Invoke((SetCaretDelegate)DoSetCaret, new object[] { visible });
else DoSetCaret(visible);
}
private void DoSetCaret(bool visible)
{
if (CaretVisible != visible)
{
CaretVisible = visible;
if (CaretVisible) ShowCaret(Handle);
else HideCaret(Handle);
}
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_SETFOCUS)
{
if (CaretVisible) { ShowCaret(Handle); }
else HideCaret(Handle);
}
}
}
}
namespace ProgramIO
{
using ProgramIO.Control;
public static class Interactive
{
public delegate void StopedDelegate();
public delegate void RunDelegate();
public static bool Initialized = false;
private static InteractiveForm frmIO = null;
private static Thread IOThread = null;
private static EventWaitHandle EventStarted =
new EventWaitHandle(false, EventResetMode.AutoReset);
public static string Title {
get { return frmIO.Title; }
set { frmIO.Title = value; } }
public static Color ForegroundColor {
get {return frmIO.ForeColor; }
set { frmIO.ForeColor = value; } }
public static event StopedDelegate OnStopped = null;
private static void form_Show(object sender, EventArgs e)
{
frmIO = sender as InteractiveForm;
EventStarted.Set();
}
private static void form_FormClosed(object sender, FormClosedEventArgs e)
{
lock (frmIO) {
frmIO = null;
Application.Exit(); }
}
public static void Initialize()
{
IOThread = new Thread(IOThreadProc);
IOThread.Name = "Interactive Thread"; IOThread.Start();
EventStarted.WaitOne();
Initialized = true;
}
public static void Run(RunDelegate runProc = null)
{
if (!Initialized) Initialize();
if (runProc != null) runProc();
Application.Run();
if (OnStopped != null) OnStopped();
}
public static void IOThreadProc()
{
InteractiveForm form = new InteractiveForm();
form.Shown += new EventHandler(form_Show);
form.FormClosed += new FormClosedEventHandler(form_FormClosed);
Application.Run(form);
}
public static void Write(string value, int x = -1, int y = -1)
{
if (frmIO != null) lock (frmIO) { frmIO.Write(value, x, y); }
}
public static void WriteLine(string value)
{
if (frmIO != null) lock (frmIO) {
Interactive.Write(value); Interactive.Write("\r\n"); }
}
public static int Read()
{
if (frmIO != null) lock (frmIO) {
string input = frmIO.Read(false);
if (input.Length > 0) return input[0]; }
return 0;
}
public static string ReadLine()
{
if (frmIO != null) lock (frmIO) { return frmIO.Read(true); }
else return "";
}
}
}
This last class, Interactive, actually serve as invoker for asynchronous methods, and it is used in Main() at the beginning.
You can skip this whole second section of code if you don't want to see console window when program is run as a windows service.
I have also created an Installer class for this, but it would be just to much code on this page.
EDIT: This InteractiveForm is actually a form with designer class, but very simple, consisting only of Form and EditBox inside filling its area.

Basicallly you need 3 projects in your solution:
Application itself
WinService for production
Console Application for test purposes
So your application must have some kind of Start() method with e.g. infinite loop that does all work and maybe Stop() method to stop processing.
Winservice project must contain class derived from ServiceBase, it'l have OnStartmethod that calls your application's Start and OnStop that calls application's Stop method.
Next, in console application you do pretty much same - calling Start method in console's entry point.
So far for debug you run your console app, and for release you publish your winservice project
Winservice class might look like:
upd
Winservice codez:
public class MyWinService : ServiceBase
{
IMyApplicationService _myApplicationService;
//constructor - resolve dependencies here
public MyWinService()
{
_myApplicationService = new MyApplicationService();
}
protected override void OnStart(string[] args)
{
base.OnStart(args);
try
{
_myApplicationService.Start();
}
catch (Exception exception)
{
//log exception
}
}
protected override void OnStop()
{
base.OnStop();
try
{
_myApplicationService.Stop();
}
catch (Exception exception)
{
//log exception
}
}
}
Application service:
public class MyApplicationService : IMyApplicationService
{
public MyApplicationService()
{
//some initializations
}
public Start()
{
//do work here
}
public Stop()
{
//...
}
}

Related

Two identical multithreading scripts are causing memoryleak

I am working on my own multithreading for my algorithm independed pathfinding for unity. However, when I am executing two the same class I get a memory leak and when only executing one instance I am having no issues. I really want to use at least two threads if it is necessary.
Below is the class I have issues with. Keep in mind, that two independend threads will have to execute parts of this script. AddJob can be called from the main unity thread but will most likely be called from another update thread for the agents.
namespace Plugins.PathFinding.Threading
{
internal class PathFindingThread
{
private Thread m_Worker;
private volatile Queue<CompletedProcessingCallback> m_CallbackQueue;
private volatile Queue<IAlgorithm> m_QueuedTasks;
internal int GetTaskCount
{
get
{
return m_QueuedTasks.Count;
}
}
internal PathFindingThread()
{
m_Worker = new Thread(Run);
m_CallbackQueue = new Queue<CompletedProcessingCallback>();
m_QueuedTasks = new Queue<IAlgorithm>();
}
private void Run()
{
Debug.Log("<b><color=green> [ThreadInfo]:</color></b> PathFinding Thread Started ");
try
{
while(true)
{
if (m_QueuedTasks.Count > 0)
{
IAlgorithm RunningTask = m_QueuedTasks.Dequeue();
RunningTask.FindPath(new IAlgorithmCompleted(AddCallback));
}
else
break;
}
Debug.Log("<b><color=red> [ThreadInfo]:</color></b> PathFinding Worker is idle and has been Stopped");
}
catch(Exception)
{
Debug.Log("<b><color=red> [ThreadInfo]:</color></b> PathFinding thread encountred an error and has been aborted");
}
}
internal void AddJob(IAlgorithm AlgorithmToRun)
{
m_QueuedTasks.Enqueue(AlgorithmToRun);
//Debug.Log("Added Job To Queue");
}
private void AddCallback(CompletedProcessingCallback callback)
{
m_CallbackQueue.Enqueue(callback);
}
private void Update()
{
if (m_CallbackQueue.Count > 0)
{
if (m_CallbackQueue.Peek().m_Callback != null) { }
m_CallbackQueue.Peek().m_Callback.Invoke(m_CallbackQueue.Peek().m_Path);
m_CallbackQueue.Dequeue();
}
if (m_Worker.ThreadState != ThreadState.Running && m_QueuedTasks.Count != 0)
{
m_Worker = new Thread(Run);
m_Worker.Start();
}
}
}
internal delegate void IAlgorithmCompleted(CompletedProcessingCallback callback);
internal struct CompletedProcessingCallback
{
internal volatile FindPathCompleteCallback m_Callback;
internal volatile List<GridNode> m_Path;
}
}
namespace Plugins.PathFinding
{
internal enum TypeOfNode
{
Ground,
Air
}
//used to store location information since array can only take rounded numbers
internal struct Position
{
internal int x;
internal int y;
internal int z;
}
internal class GridNode
{
internal Position M_PostitionInGrid { get; private set; }
internal Vector3 M_PostitionInWorld { get; private set; }
internal TypeOfNode M_type { get; private set; }
internal bool m_IsWalkable = true;
internal GridNode m_ParrentNode;
internal int Hcost;
internal int Gcost;
internal int Fcost { get { return Hcost + Gcost; } }
internal GridNode(Position postion , Vector3 WorldPosition)
{
M_PostitionInGrid = postion;
m_IsWalkable = true;
M_PostitionInWorld = WorldPosition;
}
}
}
internal delegate void FindPathCompleteCallback(List<GridNode> Path);
internal abstract class IAlgorithm
{
protected GridNode m_SavedStart;
protected GridNode m_SavedTarget;
protected List<GridNode> m_LocatedPath;
protected FindPathCompleteCallback m_Callback;
internal FindPathCompleteCallback GetCallback
{
get
{
return m_Callback;
}
}
protected PathFindingGrid m_grid;
internal abstract void FindPath(IAlgorithmCompleted callback);
protected abstract List<GridNode> CreatePath(PathFindingGrid Grid, GridNode Start, GridNode Target);
protected abstract List<GridNode> RetracePath(GridNode start, GridNode target);
}
namespace Plugins.PathFinding.Astar
{
internal class AstarFinder : IAlgorithm
{
//construction of the Algorithm
internal AstarFinder(GridNode start, GridNode target, FindPathCompleteCallback Callback)
{
m_SavedStart = start;
m_SavedTarget = target;
m_Callback = Callback;
m_LocatedPath = new List<GridNode>();
m_grid = PathFindingGrid.GetInstance;
}
//function to start finding a path
internal override void FindPath(IAlgorithmCompleted callback)
{
//running Algorithm and getting the path
m_LocatedPath = CreatePath(PathFindingGrid.GetInstance, m_SavedStart, m_SavedTarget);
callback.Invoke(
new CompletedProcessingCallback()
{
m_Callback = m_Callback,
m_Path = m_LocatedPath
});
}
//Algorithm
protected override List<GridNode> CreatePath(PathFindingGrid Grid, GridNode Start, GridNode Target)
{
if(Grid == null ||
Start == null ||
Target == null)
{
UnityEngine.Debug.Log("Missing Parameter, might be outside of grid");
return new List<GridNode>();
}
List<GridNode> Path = new List<GridNode>();
List<GridNode> OpenSet = new List<GridNode>();
List<GridNode> ClosedSet = new List<GridNode>();
OpenSet.Add(Start);
int Retry = 0;
while (OpenSet.Count > 0)
{
if(Retry > 3000 || Grid == null)
{
UnityEngine.Debug.Log("Path Inpossible Exiting");
break;
}
GridNode CurrentNode = OpenSet[0];
for (int i = 0; i < OpenSet.Count; i++)
{
if(OpenSet[i].Fcost < CurrentNode.Fcost || OpenSet[i].Fcost == CurrentNode.Fcost && OpenSet[i].Hcost < CurrentNode.Hcost)
{
CurrentNode = OpenSet[i];
}
}
OpenSet.Remove(CurrentNode);
ClosedSet.Add(CurrentNode);
if(CurrentNode == Target)
{
Path = RetracePath(CurrentNode,Start);
break;
}
GridNode[] neighbour = Grid.GetNeighbouringNodes(CurrentNode);
for (int i = 0; i < neighbour.Length; i++)
{
if (!neighbour[i].m_IsWalkable || ClosedSet.Contains(neighbour[i]))
continue;
int CostToNeighbour = CurrentNode.Gcost + Grid.GetDistance(CurrentNode, neighbour[i]);
if(CostToNeighbour < neighbour[i].Gcost || !OpenSet.Contains(neighbour[i]))
{
neighbour[i].Gcost = CostToNeighbour;
neighbour[i].Hcost = Grid.GetDistance(neighbour[i], Target);
neighbour[i].m_ParrentNode = CurrentNode;
if (!OpenSet.Contains(neighbour[i]))
OpenSet.Add(neighbour[i]);
}
}
Retry++;
}
return Path;
}
//retracing the path out of a node map
protected override List<GridNode> RetracePath(GridNode start, GridNode target)
{
List<GridNode> Output = new List<GridNode>();
GridNode current = start;
while(current != target)
{
Output.Add(current);
current = current.m_ParrentNode;
}
Output.Reverse();
return Output;
}
}
}
This shows the core of your code made thread safe.
internal class PathFindingThread
{
Task m_Worker;
ConcurrentQueue<CompletedProcessingCallback> m_CallbackQueue;
ConcurrentQueue<IAlgorithm> m_QueuedTasks;
internal int GetTaskCount
{
get
{
return m_QueuedTasks.Count;
}
}
internal PathFindingThread()
{
m_CallbackQueue = new ConcurrentQueue<CompletedProcessingCallback>();
m_QueuedTasks = new ConcurrentQueue<IAlgorithm>();
m_Worker = Task.Factory.StartNew(() =>
{
while (true)
{
IAlgorithm head = null;
if (m_QueuedTasks.TryDequeue(out head))
{
head.FindPath(new IAlgorithmCompleted(AddCallback));
}
else
{
Task.Delay(0);
}
}
});
}
internal void AddJob(IAlgorithm AlgorithmToRun)
{
m_QueuedTasks.Enqueue(AlgorithmToRun);
}
private void AddCallback(CompletedProcessingCallback callback)
{
m_CallbackQueue.Enqueue(callback);
}
private void Update()
{
CompletedProcessingCallback cb = null;
if (m_CallbackQueue.TryDequeue(out cb))
{
cb.m_Callback.Invoke(cb.m_Path);
}
}
}
Volatile is only good for changing the value of the field - not calling methods on a collection that is referenced by the field.
You propably do not need to have Volatile in CompletedProcessingCallback, but it depends where else this is used. Certainly having volatile on a struct field is a bad smell.
Resolve these thread issues first, then see if you still have the problem.

Form is opening in Background once the Splash Screen is getting closed

I have created a splash screen. On my splash screen I have given a progress bar and two buttons to perform some action. On button click I am displaying respective forms once the modules of those forms are getting loaded completely along with showing the progress on progress bar. Once the respective form will open, Splash screen shall be closed and Form should be shown on top of the screen.
But the issue is that after the splash screen closing, My form is opening in background or you can say getting out of focus which should not happen. I have checked various solutions given on google or stackoverflow but could not able to resolve my problem.
Following is my code :
SplashScreen.cs
// <--- Data Members
// --->
public SplashScreen()
{
InitializeComponent();
this.Opacity = 0.0;
UpdateTimer.Interval = TIMER_INTERVAL;
UpdateTimer.Start();
this.ClientSize = this.BackgroundImage.Size;
}
static public void ShowSplashScreen()
{
if (ms_frmSplash != null)
{
return;
}
ms_oThread = new Thread(new ThreadStart(SplashScreen.ShowForm));
ms_oThread.IsBackground = true;
ms_oThread.SetApartmentState(ApartmentState.STA);
ms_oThread.Start();
while (ms_frmSplash == null || ms_frmSplash.IsHandleCreated == false)
{
System.Threading.Thread.Sleep(TIMER_INTERVAL);
}
}
static public void CloseForm()
{
if (ms_frmSplash != null && ms_frmSplash.IsDisposed == false)
{
ms_frmSplash.m_dblOpacityIncrement = -ms_frmSplash.m_dblOpacityDecrement;
}
ms_oThread = null;
ms_frmSplash = null;
}
static public void SetStatus(string newStatus)
{
SetStatus(newStatus, true);
}
static public void SetStatus(string newStatus, bool setReference)
{
if (ms_frmSplash == null)
{
return;
}
ms_frmSplash.m_sStatus = newStatus;
if (setReference)
{
ms_frmSplash.SetReferenceInternal();
}
}
static public void SetReferencePoint()
{
if (ms_frmSplash == null)
{
return;
}
ms_frmSplash.SetReferenceInternal();
}
static private void ShowForm()
{
ms_frmSplash = new SplashScreen();
Application.Run(ms_frmSplash);
}
private void SetReferenceInternal()
{
if (m_bDTSet == false)
{
m_bDTSet = true;
m_dtStart = DateTime.Now;
ReadIncrements();
}
double dblMilliseconds = ElapsedMilliSeconds();
m_alActualTimes.Add(dblMilliseconds);
m_dblLastCompletionFraction = m_dblCompletionFraction;
if (m_alPreviousCompletionFraction != null && m_iIndex < m_alPreviousCompletionFraction.Count)
{
m_dblCompletionFraction = (double)m_alPreviousCompletionFraction[m_iIndex++];
}
else
{
m_dblCompletionFraction = (m_iIndex > 0) ? 1 : 0;
}
}
private double ElapsedMilliSeconds()
{
TimeSpan ts = DateTime.Now - m_dtStart;
return ts.TotalMilliseconds;
}
private void ReadIncrements()
{
string sPBIncrementPerTimerInterval = SplashScreenXMLStorage.Interval;
double dblResult;
if (Double.TryParse(sPBIncrementPerTimerInterval, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, out dblResult) == true)
{
m_dblPBIncrementPerTimerInterval = dblResult;
}
else
{
m_dblPBIncrementPerTimerInterval = .0015;
}
string sPBPreviousPctComplete = SplashScreenXMLStorage.Percents;
if (sPBPreviousPctComplete != "")
{
string[] aTimes = sPBPreviousPctComplete.Split(null);
m_alPreviousCompletionFraction = new ArrayList();
for (int i = 0; i < aTimes.Length; i++)
{
double dblVal;
if (Double.TryParse(aTimes[i], System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, out dblVal) == true)
{
m_alPreviousCompletionFraction.Add(dblVal);
}
else
{
m_alPreviousCompletionFraction.Add(1.0);
}
}
}
else
{
m_bFirstLaunch = true;
m_sTimeRemaining = "";
}
}
private void StoreIncrements()
{
string sPercent = "";
double dblElapsedMilliseconds = ElapsedMilliSeconds();
for (int i = 0; i < m_alActualTimes.Count; i++)
{
sPercent += ((double)m_alActualTimes[i] / dblElapsedMilliseconds).ToString("0.####", System.Globalization.NumberFormatInfo.InvariantInfo) + " ";
}
SplashScreenXMLStorage.Percents = sPercent;
m_dblPBIncrementPerTimerInterval = 1.0 / (double)m_iActualTicks;
SplashScreenXMLStorage.Interval = m_dblPBIncrementPerTimerInterval.ToString("#.000000", System.Globalization.NumberFormatInfo.InvariantInfo);
}
public static SplashScreen GetSplashScreen()
{
return ms_frmSplash;
}
private void UpdateTimer_Tick(object sender, System.EventArgs e)
{
if (Program.isRadarSelected)
{
if (count >= 100)
{
UpdateTimer.Stop();
this.Close();
}
else
{
updateProgressBar();
count += 5;
}
}
if (m_dblOpacityIncrement > 0)
{
m_iActualTicks++;
if (this.Opacity < 1)
{
this.Opacity += m_dblOpacityIncrement;
}
}
else
{
if (this.Opacity > 0)
{
this.Opacity += m_dblOpacityIncrement;
}
else
{
StoreIncrements();
UpdateTimer.Stop();
this.Close();
}
}
}
private void updateProgressBar()
{
SplashScreen.SetStatus("Loading : " + count + " %");
statusLabel.Text = m_sStatus;
m_dblLastCompletionFraction += m_dblPBIncrementPerTimerInterval;
int width = (int)Math.Floor(statusPanel.ClientRectangle.Width * m_dblLastCompletionFraction);
int height = statusPanel.ClientRectangle.Height;
int x = statusPanel.ClientRectangle.X;
int y = statusPanel.ClientRectangle.Y;
if (width > 0 && height > 0)
{
m_rProgress = new Rectangle(x, y, width, height);
if (!statusPanel.IsDisposed)
{
Graphics g = statusPanel.CreateGraphics();
LinearGradientBrush brBackground = new LinearGradientBrush(m_rProgress, Color.FromArgb(58, 96, 151), Color.FromArgb(181, 237, 254), LinearGradientMode.Horizontal);
g.FillRectangle(brBackground, m_rProgress);
g.Dispose();
}
}
}
private void RadarSelectionButton_Click(object sender, EventArgs e)
{
Program.isButtonClicked= true;
}
Program.cs
internal static class Program
{
public static bool isButtonClicked= false;
[STAThread]
private static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
SplashScreen.ShowSplashScreen();
Application.DoEvents();
while (!isButtonClicked)
{
System.Threading.Thread.Sleep(50);
}
Application.Run(new MyForm());
SplashScreen.CloseForm();
}
}
As far as I remember Application.Run(...) is blocking, meaning that your splash screen would never close before the main window is closed. You could try the code below. Let me know how it goes.
internal static class Program
{
public static bool isButtonClicked= false;
[STAThread]
private static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
SplashScreen.ShowSplashScreen();
Application.DoEvents();
while (!isButtonClicked)
{
System.Threading.Thread.Sleep(50);
}
var window = new MyForm();
window.Load += (s, e) =>
{
SplashScreen.CloseForm();
window.Activate();
}
Application.Run(window);
}
}
Regarding you CloseForm method, I am unsure how you intended it to work. The only thing you are doing is setting the opacity? But as far as you write this is not your issue. But I would think that you need to signal the main window of the splash screen to close, before the Application.Run(..) would exit.
And also the while loop in the ShowSplashScreen method; Why? Consider using stuff like ManualResetEvent for waiting and signaling between threads. Always better to wait for an event rather than polling.

c# String Length Event

Basically I want to launch an event when a string reaches a specific length.
I have a Static String
Static String _Info;
So i have My Delegate that has an integer as a Parameter !
public Delegate void ReachLengthHandler(int Length);
and My event :
public event ReachLengthHandler ReachLengthEvent;
And a Method that Keep addingSome informations to that string :
public void AddInfo()
{
new Thread(() =>
{
while(true)
_Info += ""; //Basically add the inputs of the user here !
if (_Info.Length > 500)
{
if (ReachLengthEvent != null)
ReachLengthEvent(_Info.Length);
}
}).Start();
}
Do you think its the right way to do this event or there are any cleaner ways ?
EDIT :
I want this event because I want to save this string in a Database table row so I don't want to expand the possible size of a row !
As some pointed out in the comments, you may be trying to solve an instance of the XY Problem -- but assuming you're not, you are not approaching things in an object-oriented way, starting with encapsulation.
This could be a start, FWIW:
public class MaxLengthEventArgs : EventArgs
{
public MaxLengthEventArgs(string value)
{
LastAppended = value;
}
public string LastAppended { get; private set; }
}
public delegate void MaxLengthEventHandler(object sender, MaxLengthEventArgs args);
public class StringAccumulator
{
protected StringBuilder Builder { get; private set; }
public StringAccumulator(int maxLength)
{
if (maxLength < 0)
{
throw new ArgumentOutOfRangeException("maxLength", "must be positive");
}
Builder = new StringBuilder();
MaxLength = maxLength;
}
public StringAccumulator Append(string value)
{
if (!string.IsNullOrEmpty(value))
{
var sofar = value.Length + Builder.Length;
if (sofar <= MaxLength)
{
Builder.Append(value);
if ((OnMaxLength != null) && (sofar == MaxLength))
{
OnMaxLength(this, new MaxLengthEventArgs(value));
}
}
else
{
throw new InvalidOperationException("overflow");
}
}
return this;
}
public override string ToString()
{
return Builder.ToString();
}
public int MaxLength { get; private set; }
public event MaxLengthEventHandler OnMaxLength;
}
class Program
{
static void Test(object sender, MaxLengthEventArgs args)
{
var acc = (StringAccumulator)sender;
Console.WriteLine(#"max length ({0}) reached with ""{1}"" : ""{2}""", acc.MaxLength, args.LastAppended, acc.ToString());
}
public static void Main(string[] args)
{
var acc = new StringAccumulator(10);
try
{
acc.OnMaxLength += Test;
acc.Append("abc");
acc.Append("def");
acc.Append("ghij");
Console.WriteLine();
acc.Append("ouch...");
Console.WriteLine("(I won't show)");
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
Console.ReadKey();
}
}
Also, keep in mind that strings in .NET are immutable.
Accumulating them using string concatenation, as you did in
_Info += ""
... isn't going to scale well (performance-wise).
'HTH,
Usually eventhandler is used with specific signature.
public delegate void ReachLengthHandler(object sender, EventArgs args);
class Program
{
public event ReachLengthHandler handler;
private const int Threshhold = 500;
public string Info
{
set
{
if (value.Length > Threshhold)
{
this.OnReachLength(null);
}
}
}
public void OnReachLength(EventArgs args)
{
this.handler?.Invoke(this, args);
}
}

Beep in C# .NET application on server side

To debug a firewall delay issue I need an application that will produce a beep on server side when it detects an HTTP GET request.
This code (test.ashx):
<%# WebHandler Language="C#" Class="TestHandler" %>
using System;
using System.Web;
public class TestHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
HttpResponse Response = context.Response;
try
{
Response.Write("Before beep");
Console.Beep();
Response.Write("After beep");
}
catch (Exception ex)
{
Response.Write(ex.Message + "<br />\n" + ex.InnerException.Message);
}
}
public bool IsReusable { get { return false; } }
}
produces sound only when debugging in IIS Express. After moving the web app to IIS, the sound disappears.
The three easy ways of producing a sound are System.Console.Beep(), System.Media.SoundPlayer, and System.Media.SystemSounds.Beep().
Unfortunately, these methods only work in desktop applications, and won't work in service applications. When ASP.Net apps are run under IIS Express (a desktop app), these sound methods work. However, when ASP.Net apps are run under the IIS service, the sound methods don't work.
System.Console.Beep() ultimately calls the kernel32.dll Beep() function. It's restricted to desktop apps only (scroll down to the Requirements section).
Same for System.Media.SoundPlayer and System.Media.SystemSounds.Beep(). They call the kernel32.dll MessageBeep() and the winmm.dll PlaySound() functions, respectively. They, too, are restricted to desktop apps.
One way to get sounds to play in a service is use NAudio. It's easy to install via NuGet.
This chunk of code is the only way I could get the sound to play. It has to be played on a separate worker thread, and the execution of the worker thread needs to be paused to let the .wav file finish playing.
using System;
using System.Diagnostics;
using System.Threading;
using NAudio.Dsp;
using NAudio.Wave;
...
protected void Button1_Click(object sender, EventArgs e)
{
var waveFilename = #"c:\Windows\Media\tada.wav";
/* Trying to play the .wav file on the main thread
doesn't seem to work. */
ThreadPool.QueueUserWorkItem(
(state) =>
{
using (var audioPlayback = new AudioPlayback())
{
audioPlayback.Load(waveFilename);
audioPlayback.Play(); // Asynchronous.
/* Need to sleep for the approximate length of .wav file,
otherwise no sound is produced because of the
asynchronous Play() call. */
Thread.Sleep(2000);
}
});
}
Here's the supporting code taken from code in NAudio's NAudioWPFDemo project:
public class MaxSampleEventArgs : EventArgs
{
[DebuggerStepThrough]
public MaxSampleEventArgs(float minValue, float maxValue)
{
this.MaxSample = maxValue;
this.MinSample = minValue;
}
public float MaxSample { get; private set; }
public float MinSample { get; private set; }
}
public class FftEventArgs : EventArgs
{
[DebuggerStepThrough]
public FftEventArgs(Complex[] result)
{
this.Result = result;
}
public Complex[] Result { get; private set; }
}
public class SampleAggregator : ISampleProvider
{
// volume
public event EventHandler<MaxSampleEventArgs> MaximumCalculated;
private float maxValue;
private float minValue;
public int NotificationCount { get; set; }
int count;
// FFT
public event EventHandler<FftEventArgs> FftCalculated;
public bool PerformFFT { get; set; }
private readonly Complex[] fftBuffer;
private readonly FftEventArgs fftArgs;
private int fftPos;
private readonly int fftLength;
private int m;
private readonly ISampleProvider source;
private readonly int channels;
public SampleAggregator(ISampleProvider source, int fftLength = 1024)
{
channels = source.WaveFormat.Channels;
if (!IsPowerOfTwo(fftLength))
throw new ArgumentException("FFT Length must be a power of two");
this.m = (int) Math.Log(fftLength, 2.0);
this.fftLength = fftLength;
this.fftBuffer = new Complex[fftLength];
this.fftArgs = new FftEventArgs(fftBuffer);
this.source = source;
}
private bool IsPowerOfTwo(int x)
{
return (x & (x - 1)) == 0;
}
public void Reset()
{
count = 0;
maxValue = minValue = 0;
}
private void Add(float value)
{
if (PerformFFT && FftCalculated != null)
{
fftBuffer[fftPos].X = (float) (value * FastFourierTransform.HammingWindow(fftPos, fftLength));
fftBuffer[fftPos].Y = 0;
fftPos++;
if (fftPos >= fftBuffer.Length)
{
fftPos = 0;
// 1024 = 2^10
FastFourierTransform.FFT(true, m, fftBuffer);
FftCalculated(this, fftArgs);
}
}
maxValue = Math.Max(maxValue, value);
minValue = Math.Min(minValue, value);
count++;
if (count >= NotificationCount && NotificationCount > 0)
{
if (MaximumCalculated != null)
MaximumCalculated(this, new MaxSampleEventArgs(minValue, maxValue));
Reset();
}
}
public WaveFormat WaveFormat { get { return source.WaveFormat; } }
public int Read(float[] buffer, int offset, int count)
{
var samplesRead = source.Read(buffer, offset, count);
for (int n = 0; n < samplesRead; n += channels)
Add(buffer[n + offset]);
return samplesRead;
}
}
public class AudioPlayback : IDisposable
{
private IWavePlayer _playbackDevice;
private WaveStream _fileStream;
public void Load(string fileName)
{
Stop();
CloseFile();
EnsureDeviceCreated();
OpenFile(fileName);
}
private void CloseFile()
{
if (_fileStream != null)
{
_fileStream.Dispose();
_fileStream = null;
}
}
private void OpenFile(string fileName)
{
try
{
var inputStream = new AudioFileReader(fileName);
_fileStream = inputStream;
var aggregator = new SampleAggregator(inputStream);
aggregator.NotificationCount = inputStream.WaveFormat.SampleRate / 100;
aggregator.PerformFFT = true;
_playbackDevice.Init(aggregator);
}
catch
{
CloseFile();
throw;
}
}
private void EnsureDeviceCreated()
{
if (_playbackDevice == null)
CreateDevice();
}
private void CreateDevice()
{
_playbackDevice = new WaveOut { DesiredLatency = 200 };
}
public void Play()
{
if (_playbackDevice != null && _fileStream != null && _playbackDevice.PlaybackState != PlaybackState.Playing)
_playbackDevice.Play();
}
public void Pause()
{
if (_playbackDevice != null)
_playbackDevice.Pause();
}
public void Stop()
{
if (_playbackDevice != null)
_playbackDevice.Stop();
if (_fileStream != null)
_fileStream.Position = 0;
}
public void Dispose()
{
Stop();
CloseFile();
if (_playbackDevice != null)
_playbackDevice.Dispose();
}
}
Try this System.Media.SystemSounds.Beep.Play();

Event handler not always called

I have custom thread which parses WiFi networks and updates the UI (DataGridView and graphs). Here is the thread method:
private void RefreshThread()
{
var watch = Stopwatch.StartNew();
while (true)
{
UpdateAllNetworks();
UpdateAllInterferences();
UpdateAllColors();
switch (ActivePage)
{
case Page.Start:
break;
case Page.Networks:
this.Invoke((MethodInvoker)delegate
{
UpdateDataGridWithNetworks();
ClearGraphs();
Draw24GHzGraph();
DrawSignalsOverTimeGraph();
});
break;
case Page.Channels:
break;
case Page.Analyze:
break;
default:
break;
}
watch.Stop();
int elapsedMs = (int) watch.ElapsedMilliseconds;
if (elapsedMs < Constants.NetworksRefreshThreadInterval)
Thread.Sleep(Constants.NetworksRefreshThreadInterval - elapsedMs);
}
}
Custom DataGridView:
public class CustomDataGridView : DataGridView
{
...
protected override void OnCellClick(DataGridViewCellEventArgs e)
{
base.OnCellClick(e);
int Index = e.RowIndex;
if (Index != -1)
{
DataGridViewRow row = Rows[Index];
PrimaryKeyForSelectedRow = row.Cells[KeyName].Value.ToString();
}
}
}
The DataGridView is my custom DataGrid where I have a click event handler. I have observed that sometimes the event handler isn't called but in most cases it is.
What could be the problem? Is it related to multithreading or the event isn't queued?
Your code blocks main thread, use separate thread for your network details update. Here is quick sample how it done.
class Program
{
static void Main(string[] args)
{
var helper = new Looper(5000, YourMethod_RefreshThread);
helper.Start();
}
private static void YourMethod_RefreshThread()
{
Console.WriteLine(DateTime.Now);
}
}
public class Looper
{
private readonly Action _callback;
private readonly int _interval;
public Looper(int interval, Action callback)
{
if(interval <=0)
{
throw new ArgumentOutOfRangeException("interval");
}
if(callback == null)
{
throw new ArgumentNullException("callback");
}
_interval = interval;
_callback = callback;
}
private void Work()
{
var next = Environment.TickCount;
do
{
if (Environment.TickCount >= next)
{
_callback();
next = Environment.TickCount + _interval;
}
Thread.Sleep(_interval);
} while (IsRunning);
}
public void Start()
{
if (IsRunning)
{
return;
}
var thread = new Thread(Work);
thread.Start();
IsRunning = true;
}
public void Stop()
{
this.IsRunning = false;
}
public bool IsRunning { get; private set; }

Categories