I have a WPF application into which I'm adding some top level, catch all error handling. I handle the DispatcherUnhandledException event like so:
private void App_OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
{
if (_isHandlingError)
{
_log.Error("Critical unhandled error", e.Exception);
e.Handled = true;
return;
}
_isHandlingError = true;
var vm = _windsorContainer.Resolve<ErrorReporterViewModel>();
Dispatcher.Invoke(() =>
{
vm.Details = FailureMessageBuilder.CreateContent(e.Exception);
var view = new ErrorReporterView { DataContext = vm };
view.Show();
});
e.Handled = true;
NotifyOfException(e.Exception, vm.Description);
_isHandlingError = false;
}
The problem is, that the call to Show() (or ShowDialog) never returns, and the error dialog is never shown.
What might be the issue?
Do you have attached your event to the Application?
cApp.Dispatcher.UnhandledException += new DispatcherUnhandledExceptionEventHandler(Dispatcher_UnhandledException);
cApp.InitializeComponent();
cApp.Run(new MainWindow());
And then
private static void Dispatcher_UnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
{
...e.Exception.Message
}
Related
I have a notify icon in my Winforms form and it seems that when any kind of event happens the tray icon is duplicated.
I have debugged one of the issues, being that it is duplicated when the dialog box is closed after using it.
It happens in debug and when released.
The other issue it with a timer that runs method.
I cannot see why this happens. My timer ran 60 times last night and each time it has four methods to run and there were hundreds of icons in the tray.
My code is as follows:
public Form1()
{
InitializeComponent();
notifyIcon1.BalloonTipText = "Mappi CSV Manager is running.";
notifyIcon1.BalloonTipTitle = "Mappi CSV Manager";
notifyIcon1.Text = "Mappi CSV Manager";
}
private void Form1_Resize(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized)
{
ShowIcon = false;
ShowInTaskbar = false;
notifyIcon1.Visible = true;
notifyIcon1.ShowBalloonTip(1000);
}
}
private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
{
ShowInTaskbar = true;
notifyIcon1.Visible = false;
WindowState = FormWindowState.Normal;
}
protected override void OnClosed(EventArgs e)
{
base.OnClosed(e);
// Call Dispose to remove the icon out of notification area of Taskbar.
notifyIcon1.Dispose();
}
protected override void OnFormClosing(FormClosingEventArgs e)
{
if (CloseCancel() == false)
{
e.Cancel = true;
};
}
//When closing the form
public static bool CloseCancel()
{
const string message = "If you close the program, no files will be generated!";
const string caption = "Stop!";
var result = MessageBox.Show(message, caption,
MessageBoxButtons.YesNo,
MessageBoxIcon.Warning);
if (result == DialogResult.Yes)
return true;
else
return false;
}
//Set new value for timer
private void UdTimerValue_ValueChanged(object sender, EventArgs e)
{
timer1.Interval = Convert.ToInt32(udTimerValue.Value) * 60000;
}
//Start generating CSV's
private void Timer1_Tick(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
if (AutoGenerateEnabled)
{
richLogWindow.AppendText("CSV Created at: " + DateTime.Now + "\r\n");
var startdate = "";
if(DateTime.Now.Hour == 1)
{
richLogWindow.Clear();
startdate = DateTime.Today.AddDays(-1).ToString("yyyy-MM-dd");
CSVGenerator.GenerateCSV(startdate, this);
}
else
{
startdate = DateTime.Today.ToString("yyyy-MM-dd");
CSVGenerator.GenerateCSV(startdate, this);
}
}
else
{
return;
}
}
}
Why is this code producing another tray icon every time a button is clicked or an event happens.
TIA
I found the error. I have put RichTextBoxAppend.AddNewText("test me", new Form1()); the new form was created each time a process was run. I am an idiot!
I am trying to get my application to minimize to the notification area and that part is working. The problem is, when I double click it, it is not showing the window again.
This is what I'm doing, I hope it's something simple I'm doing wrong:
public partial class Main : Form
{
public Main()
{
InitializeComponent();
CreateNotifyIcon();
}
private void CreateNotifyIcon()
{
mynotifyicon.BalloonTipIcon = ToolTipIcon.Info;
mynotifyicon.BalloonTipText = "[Balloon Text when Minimized]";
mynotifyicon.BalloonTipTitle = "[Balloon Title when Minimized]";
mynotifyicon.Icon = Resources.lightning;
mynotifyicon.Text = "[Message shown when hovering over tray icon]";
}
private void MainLoad(object sender, EventArgs e)
{
Resize += MainResize;
MouseDoubleClick += MainMouseDoubleClick;
}
private void MainResize(object sender, EventArgs e)
{
try
{
if (FormWindowState.Minimized == WindowState)
{
mynotifyicon.Visible = true;
mynotifyicon.ShowBalloonTip(3000);
ShowInTaskbar = false;
Hide();
}
else if (FormWindowState.Normal == WindowState)
{
mynotifyicon.Visible = false;
}
}
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message);
}
}
private void MainMouseDoubleClick(object sender, MouseEventArgs e)
{
try
{
Show();
WindowState = FormWindowState.Normal;
ShowInTaskbar = true;
mynotifyicon.Visible = false;
}
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message);
}
}
}
Something I forgot to mention was I put a debug stop on MainMouseDoubleClick and it's never hitting that point.
Thanks for the help!
** EDIT **
I changed the double click to have a try/catch and it's not being reached at all. Not even to the try.
You need to add the click event to the notifyicon. At the moment you are registering the handler on the form.
mynotifyicon.MouseDoubleClick += MainMouseDoubleClick;
Attach the MouseDoubleClick event at the end of CreateNotifyIcon:
mynotifyicon.MouseDoubleClick += MainMouseDoubleClick;
I would recommend renaming the event handler MainMouseDoubleClick to something more appropriate and unregistering it from the form's double click event.
I have used this and its working :
this.WindowState = FormWindowState.Normal;
this.Activate();
I've got this code and I'm using it to show a button which allows the user to choose an image from his library and use it as a background for my app.
So I create a PhotoChooserTask, set it to show the camera and bind it to a method that has to be executed when the task is completed.
The button will start the task by showing the PhotoChooserTask.
The action to do on complete is quite easy, I've just got to set a boolean value and update an image source.
PhotoChooserTask pct_edit = new PhotoChooserTask();
pct_edit.ShowCamera = true;
pct_edit.Completed += pct_edit_Completed;
Button changeImageButton = new Button { Content = "Change Image" };
changeImageButton.Tap += (s, e) =>
{
pct_edit.Show();
};
void pct_edit_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
bi.SetSource(e.ChosenPhoto);
IsRebuildNeeded = true;
}
}
The problem is that it won't show the PhotoChooserTask but it will give me an exception, taking me to
private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
}
in App.xaml.cs.
This looks weird as I've got another PhotoChooserTask in the same class and this one works fine.
What's wrong with it?
VisualStudio won't even tell me what's the exception and so there's no way to figure it out!
EDIT:
I just found out that the exception is thrown when I call
pct_edit.Show();
in the button's tap event.
You should be defining your chooser as a field in your class. It's a requirement that you have page scope for the PhotoChooser. You then subscribe to it in your constructor. This is stated on the MSDN here
class SomeClass
{
readonly PhotoChooserTask pct_edit = new PhotoChooserTask();
SomeClass()
{
pct_edit.ShowCamera = true;
pct_edit .Completed += new EventHandler<PhotoResult>(pct_edit_Completed);
}
}
You can use try to check what is the problem
changeImageButton.Tap += (s, e) =>
{
try
{
PhotoChooserTask pct_edit = new PhotoChooserTask();
pct_edit.ShowCamera = true;
pct_edit.Completed += (s,e) =>
{
if (e.TaskResult == TaskResult.OK)
{
var bi = new BitmapImage() // maybe you didn't initialize bi?
bi.SetSource(e.ChosenPhoto);
IsRebuildNeeded = true;
}
}
pct_edit.Show();
}
catch (Exception ex)
{
Message.Show(ex.Message);
}
};
Put brakepoint on Message, then you can check everything inside ex.
Please in my code i try to catch win32.systemevents.sessionended event to procede with saving of my app data by the end of session in case the app is not closed manually .. some time ago this has been workin and now that i had my project grown a lil it is not any more..? i have tried to find something meaningfull for few days but found nothing really.. when i try to catch another systemevent like MonitorResolutionChanged it works well but this one not. I have also tried to register within the mainWindow (app form ..), nothing :-( Please any idea?
I think all the relevant information should be in the beginning till void Main but i put it all in case you would need or want to see more .. Thanx a lot Tomas
My code:
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Threading;
using MovablePython; // my own class within this project
using Avn; //my own referenced assembly
namespace DirDist
{
class Program
{
private static string appGuid = "Cddbserviceman";
private static System.Windows.Forms.ContextMenu nIMenu;
internal static System.Windows.Forms.NotifyIcon notifyIcon1;
private static MenuItem showItem;
public static MenuItem justCDsItem;
private static MenuItem searchItem;
private static MenuItem settingsItem;
private static MenuItem quitItem;
internal static Form1 mainWindow;
private static Hotkey hk;
internal static Registration.LicenceState mode; // app mode - registered/trial/blocked/demaged ..
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
using (Mutex mutex = new Mutex(false, appGuid))
{
if (!mutex.WaitOne(0, false))
{
MessageBox.Show("CDDB is already running on your machine \n (Check status bar for access ..)");
return;
}
GC.Collect();
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
mode = Registration.Startup();
Program.mainWindow = new Form1();
mainWindow.Activate();
//mainWindow.Validate();
//mainWindow.Update();
mainWindow.Visible = false;
PutIcon();
//Microsoft.Win32.SystemEvents.SessionEnded += SystemEvents_SessionEnded;
Microsoft.Win32.SystemEvents.SessionEnded += new Microsoft.Win32.SessionEndedEventHandler(SystemEvents_SessionEnded);//**zkousime zda funguje pro hibernaci ..
RegisterHotKey(true);
Application.Run();
}
}
static void SystemEvents_SessionEnded(object sender, Microsoft.Win32.SessionEndedEventArgs e)
{
//MessageBox.Show("SessionEnded fired");
RegisterHotKey(false);
notifyIcon1.Visible = false;
notifyIcon1.Dispose();
notifyIcon1 = null;
if (!mainWindow.dBSaved) mainWindow.SaveDb(Form1.settings.dBPath);
if (mainWindow.index != null) mainWindow.SaveIndex(Form1.settings.indexPath);
Microsoft.Win32.SystemEvents.SessionEnded -= new Microsoft.Win32.SessionEndedEventHandler(SystemEvents_SessionEnded);
mainWindow.Close();
}
// zaregistruje globalni hotkey ctrl+shift+F Pro hledani
private static void RegisterHotKey(bool active)
{
if (!active)
{
if (hk != null) hk.Unregister();
}
else
{
if(hk ==null) hk = new Hotkey();
hk.KeyCode = Keys.F;
//hk.Windows = true;
hk.Shift = true;
hk.Control = true;
//hk.Pressed += delegate { Console.WriteLine("Windows+1 pressed!"); };
hk.Pressed += delegate { searchItemClick(new object(), new EventArgs()); };
if (hk.GetCanRegister(mainWindow)) hk.Register(mainWindow);
else ; // just do nothing
}
}
private static void PutIcon()
{
if (notifyIcon1 == null)
{
showItem = new MenuItem ("&Show interface", new System.EventHandler (showInfaceClick));
justCDsItem = new MenuItem ("&Jus'CDs",new System.EventHandler ( justCDsClick));
justCDsItem.Checked = Form1.settings.justCDs;
searchItem = new MenuItem("Search CDDB",new System.EventHandler (searchItemClick));
searchItem.Shortcut = Shortcut.CtrlShiftF;
searchItem.ShowShortcut = true;
settingsItem = new MenuItem("Settings", new System.EventHandler(settingsItemClick));
quitItem = new MenuItem("&Quit", new System.EventHandler(quitItemClick));
nIMenu = new System.Windows.Forms.ContextMenu(new MenuItem[5] { showItem, justCDsItem, searchItem,settingsItem, quitItem });
notifyIcon1 = new System.Windows.Forms.NotifyIcon();
notifyIcon1.ContextMenu = nIMenu;
notifyIcon1.Icon = new System.Drawing.Icon(System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location) + "\\Icon1.ico");
//notifyIcon1.Icon = new System.Drawing.Icon(System.IO.Path.GetDirectoryName(
//System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase ) + "Icon1.ico");
//notifyIcon1.Icon = new System.Drawing.Icon("Icon1.ico");
notifyIcon1.DoubleClick += new EventHandler(notifyIcon1_DoubleClick);
notifyIcon1.Visible = true;
}
}
/* private static void notifyIcon1_MouseMove(object sender, MouseEventArgs mea)
* aby to fungovalo je treba upravit contextmenu na contextmenustrip a taky ty items .. az nakonec
* je tu kolem uz rozdelana priprava ..
{
notifyIcon1.ShowBalloonTip(2000,AppName,"Active",ToolTipIcon.None);
} */
// clicks on NotificationIcon context menu ..
private static void showInfaceClick(object sender, EventArgs e)
{
mainWindow.tabControl1.SelectedIndex = 0;
mainWindow.Show();
}
private static void justCDsClick(object sender, EventArgs e)
{
Form1.settings.justCDs = mainWindow.checkBox1.Checked = justCDsItem.Checked = !Form1.settings.justCDs;
if (mainWindow.Visible) mainWindow.Update();
}
private static void searchItemClick(object sender, EventArgs e)
{
mainWindow.tabControl1.SelectedIndex = 1 ;
//this.Size = new Size(this.Width, SystemInformation.PrimaryMonitorSize.Height);
mainWindow.Location = new System.Drawing.Point(SystemInformation.PrimaryMonitorSize.Width - mainWindow.Width, SystemInformation.PrimaryMonitorSize.Height - mainWindow.Height);
//mainWindow.Location = new System.Drawing.Point(880, 500);
mainWindow.Show();
}
private static void settingsItemClick(object sender, EventArgs e)
{
mainWindow.tabPage3_GotFocus(new Object(), new EventArgs());
mainWindow.tabControl1.SelectedIndex = 2;
mainWindow.Show();
}
public static void quitItemClick(object sender, EventArgs e)
{
if (DialogResult.Cancel == MessageBox.Show("Really exit application and stop scanning?",Form1.AppName,MessageBoxButtons.OKCancel,MessageBoxIcon.Question)) return;
if (!mainWindow.dBSaved) mainWindow.SaveDb(Form1.settings.dBPath);
//if (mainWindow.index != null) mainWindow.SaveIndex(Form1.settings.indexPath);
if (Form1.settings.fileIndex) mainWindow.SaveIndex(Form1.settings.indexPath);
mainWindow.Close();
mainWindow = null;
notifyIcon1.Visible = false;
Application.Exit();
}
static void notifyIcon1_DoubleClick(object sender, EventArgs e)
{
//throw new NotImplementedException();
//if (!mainWindow.Visible) mainWindow.WindowState = FormWindowState.Normal; else mainWindow.WindowState = FormWindowState.Minimized;
//if (!mainWindow.Visible) mainWindow.Show(); else mainWindow.Hide();
if (!mainWindow.Visible) mainWindow.Visible = true; else mainWindow.Visible = false;
}
}
}
OK. So here is the catch and solution . In Windows it is not determined whether win32.systemevents.sessionended shall be risen or form.close() will be called first by operating system. moreover it seems that if form.close() is called first then sessionended is omited even though form is not closed and disposed due to canceling closing process. in my system this behaviour changed after i ran some registry cleaning software. anyway understanding this we have to take care of both possible scenarios.
1. catch win32.systemevents.sessionended (or sessionending) event whatever suits our needs better and be
.
.
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Microsoft.Win32.SystemEvents.SessionEnded += new Microsoft.Win32.SessionEndedEventHandler(SystemEvents_SessionEnded);
Program.mainWindow = new Form1();
mainWindow.Activate();
mainWindow.Visible = false;
PutIcon();
RegisterHotKey(true);
Application.Run();
}
}
public static void SystemEvents_SessionEnded(object sender, Microsoft.Win32.SessionEndedEventArgs e)
{
// do whatever needed and exit application ..
RegisterHotKey(false);
notifyIcon1.Visible = false;
notifyIcon1.Dispose();
notifyIcon1 = null;
if (!mainWindow.dBSaved) mainWindow.SaveDb(Form1.settings.dBPath);
if (mainWindow.index != null) mainWindow.SaveIndex(Form1.settings.indexPath);
Microsoft.Win32.SystemEvents.SessionEnded -= new Microsoft.Win32.SessionEndedEventHandler(SystemEvents_SessionEnded);
if (mainWindow != null)
{
mainWindow.Dispose();
mainWindow = null;
}
Application.Exit();
}
2. properly override form.OnClosing() because this is being called when form is closing either manually by user or by system when shuting down, loging off etc. or create hanler for main form.Closing:
public Form1()
{
this.Closing += new CancelEventHandler(this.Form1_Closing);
InitializeComponent();
}
private void Form1_Closing(Object sender, CancelEventArgs e)
{
if (systemShutdown) Program.SystemEvents_SessionEnded(this, new Microsoft.Win32.SessionEndedEventArgs(Microsoft.Win32.SessionEndReasons.SystemShutdown));
else
{
e.Cancel = true;
this.Hide();
}
}
just want to mention that message pump must be runnig in order to sessionended be risen. Application.run() accomplishes that.
in my case as you can see i had to dig even deeper as i had closing redirected just to hide the app not to close it ( i just hide the app to notification irea icon and close it manually when i need .. ) and so i had to use some kind of way to specify the situation when this is called because sender is unfortunatelly and unexpectedly always this ..?
this is done by overring WndProc and catching propper message .here you can listen pretty much to everything inside windows ( like disc inserted / removed )but it is hooked only to a form and implementation gets often not so simple as you have to manully define various values and structs and compare against those values .. other then that its pretty simple:
private static int WM_QUERYENDSESSION = 0x11;
private static bool systemShutdown = false;
protected override void WndProc(ref System.Windows.Forms.Message m)
{
if (m.Msg==WM_QUERYENDSESSION)
{
systemShutdown = true;
}
base.WndProc(ref m);
}
this was found here:
http://msdn.microsoft.com/en-us/library/microsoft.win32.systemevents.sessionending.aspx
Thinking a bit further we can possibly omit point 1 as system shall probably always try to call mainForm.close() but i keep it as i can not be certain about windows behaviour once it runs those things in different order again .. and also it is the mainly suggested solution for reacting to system shut down ..
hope this is helpfull for someone. greets from prague tomas
Here is something that you could try
For a shutdown, override the OnShutdown method:
protected override void OnShutdown()
{
//your code here
base.OnShutdown();
}
For a logoff:
First, add an event handler to Microsoft.Win32.SystemEvents.SessionEnded in the Service Constructor:
public MyService()
{
InitializeComponent;
Microsoft.Win32.SystemEvents.SessionEnded += new Microsoft.Win32.SessionEndedEventHandler(SystemEvents_SessionEnded);
}
Then add the handler:
void SystemEvents_SessionEnded(object sender, Microsoft.Win32.SessionEndedEventArgs e)
{
//your code here
}
This should catch any ended session, including the console itself (the one running the services).
The following works fine for a windows form.
It simply uses a delegate to reactivate a GroupBorder on the parent form when the child form is closed.
private void uxUpdateDataButton_Click(object sender, EventArgs e)
{
uxRevisionHelperGroupBox.Enabled = false;
uxBindingNavigator.Hide();
uxFormDatabase myNewDisplay = new uxFormDatabase();
myNewDisplay.FormClosed += delegate { activateGroupBorder(); };
myNewDisplay.Show();
}
public void activateGroupBorder()
{
uxRevisionHelperGroupBox.Enabled = true;
uxBindingNavigator.Show();
}
Is it possible to do the equivalent to the above but for a messagebox instead of the child form?
This is my attempt which is not the solution:
private void uxAuthorPictureBox_Click(object sender, EventArgs e)
{
uxRevisionHelperGroupBox.Enabled = false;
uxBindingNavigator.Hide();
MessageBox myMessage = new MessageBox;
myMessage.close += delegate { activateGroupBorder(); };
myMessage.Show("hello world");
}
public void activateGroupBorder()
{
uxRevisionHelperGroupBox.Enabled = true;
uxBindingNavigator.Show();
}
MessageBox.Show(...) is synchronous call, i.e. execution doesn't continue further until box is closed. Why can't you just call your activateGroupBorder() after the message box is done? E.g.:
MessageBox.Show("hello world");
this.activateGroupBorder();