Silly thing I need help with.
When I run my application if I hit the X button to close the window, it stops the application. What I want is for it to hide the winform but keep running on the task bar (already have it running on the task bar).
Is there a simple solution for me to do this?
Keeping the taskbar button requires the window to stay alive. You can do so by just having the window minimize instead of close. Which requires implementing the FormClosing event, something like this:
bool shouldTerminate;
protected override void OnFormClosing(FormClosingEventArgs e) {
if (e.CloseReason == CloseReason.UserClosing && !shouldTerminate) {
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
base.OnFormClosing(e);
}
You can handle formclosing event and make it hide the form instead of closing it.
void myForm_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
this.Hide();
}
Rather than keep it running in Taskbar, what you need to do is to hide it on application load, and keep it running in System Tray area. The NotifyIcon control will help you achieve this behavior. You can find how to implement such behavior in this MSDN article.
Also see:
Creating Tray Applications in .NET: A Practical Guide
minimize app to system tray
How can I make a .NET Windows Forms application that only runs in the System Tray?
Related
I've a very heavy application that takes some time to close itself (it also depends on the pc where it is running.. but this is not the matter right now)
I would like to show a custom window with a message during this closing time, but as soon as i call the "Shutdown" method every window disappears (except made for the MessageBox).
This is the code i'm trying to use to achieve my objective
void MainWindow_Closing(object sender, CancelEventArgs e)
{
Task.Factory.StartNew(() =>
{
var closingWaitTest = "application closing, please wait;
Application.Current.Dispatcher.Invoke(() =>
{
var closingSplash = new ClosingSplashWindow(closingWaitTest);
closingSplash.Show();
});
MessageBox.Show(closingWaitTest);
});
Application.Current.Shutdown();
}
I Added a messageBox just to check, and it actually works. I mean, the MessageBox stays open until the application process is alive (i check that from the windows TaskManager) while my Window is instantly closed.
Hope someone can give some advice about this,
thanks in advance (:
EDIT -
So, the main problem is that as soon as i call the Application.Current.Shutdown my splash window instantly closes, while the application process is still up and running for some time (disposing all my things before calling shutdown actually reduced this time a bit).
The point is that i would like to show a window for the entirety of time that the process is still up; given the fact that a MessageBox behaves exactly like that, my question is:
Is there a way to make my ClosingSplashWindow behave like a MessageBox and stay visible until the application process is really dead?
Since Application.Current.Shutdown(); is going to close the application immediately. Maybe you first have a flag to track that application is being closed, cancel the Closing event and initiate the Resource cleanup followed by Application.Current.Shutdown(); again.
The Application_Closing handler may get fired once again, since you've a flag which says you're about to close you can directly exit the handler and all should be good.
First of all, you want to have a flag which indicates that your application is currently shutting down:
private bool IsShuttingDown { get; set; }
Then you should cancel closing operation, perform some heavy work and shut down your application:
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
if (!IsShuttingDown)
{
e.Cancel = true;
ShowSplashWindow();
PerformHeavyOperation();
Application.Current.Shutdown();
IsShuttingDown = true;
}
}
In the end I solved the problem creating another application that shows a window while the main application process is still up and running.
I know it is not the best way to do it, but i was not able to do it in any other way..
Thank for the support! :)
I have started prototyping a C# MDI application and am running into an issue. It seems that when an MDIChild is open in the MDIParent I have to hit the close buttom on the parent multiple times to close the application. Each click on the close button closes one of the MDIChildren.
I suspected that it had to do with my MDIChildren's base form's on close method.
private void _AssetFormBase_FormClosing(object sender, FormClosingEventArgs e)
{
if(sender != this.MdiParent)
{
e.Cancel = true;
this.Hide();
}
}
Though my trick above does not seem to work. I assume that when the MDIParents close is called it in turn first calls all of its childrens close methods. So if the sender is the parents then instead of cancelling and hiding (to preserve the forms state), I would not do this and allow whatever normally happens to happen.
Any idea what the issue might be?
The sender is not what you think it is. Use e.CloseReason instead, you'll get CloseReason.MdiFormClosing. But don't test for that specific value, you also don't want to prevent the operating system from shutting down. Use:
private void _AssetFormBase_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
e.Cancel = true;
this.Hide();
}
}
Note that you'll also get UserClosing when you call Close() in your own code.
this.ShowInTaskbar = false;
this.WindowState = FormWindowState.Minimized;
//this.visible = false (Hotkeys stop working forever but the grey rest of the form would disappear from above taskbar)
ReRegisterHotkeys();
I use the code above to minimize my application with a tray icon. Now the minimized rest of my form hangs still in the left right corner a little above the taskbar where the start button resides. Visible is only the forms grey titlebar with the little "x" to close it and its caption text above the title bar.
This is very weird. I set my form to "mimimized" and set not to show in taskbar and it still does.
I have registered Hotkeys with my form so I may not set it to "invisible" else the hotkeys somehow cease to work even if I re-register the Hotkeys afterwards again.
I found no alternative yet to remove this minimized form caption other than set it to "invisible"
or removing its titlebar what I also don't want to do. I need titlebar, titlebar icon and titlebar control area in this program, the form shall not become a toolwindow or without borders.
How do I make this grey rest of the form above the taskbar disappearing without setting my form to a toolwindow and without setting it totally invisible. My Hotkeys must still work after it and the form must still keep its titlebar, icon and control area when I set it back to normal again.
I took my hotkey code from this example. The only difference is that I packed the procedure to register the hotkey into a sub-function named "ReRegisterHotkeys()".
Important:
The issue with the titlebar showing when form is minimized is not connected with the registered hotkeys.
It's a common "C# issue". If I have a form and minimize it and set it to invisible in taskbar
it is still shown the titlebar with the "x" in the taskbar. This I want to remove without making
the form invisible or without removing the window style.
"this.show" or "this.hide" behaves the same fatal as "this.visible=true/false" since the hotkeys are gone. I create my form as shown by default and want not to create it hidden already.
This is what shall be not there - how to remove it without hurting:
All you have to do is call Hide() and Show() when you want to hide and show your form.
NOTE: Hide() will hide from taskbar as well.
private void Form1_Resize(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized)
Hide();
}
You may hide and show the NotifyIcon opposite to the form to not have a icon when the form is shown.
Obviously you need a NotifyIcon to display your app in the system tray.
Finally your code will look like this:
private void Form1_Resize(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized)
{
Hide();
notifyIcon1.Visible = true;
}
}
private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
{
Show();
notifyIcon1.Visible = false;
WindowState = FormWindowState.Normal;
}
I have a C# GUI app that shows a message using MessageBox.Show(Message);, however if the user fails to click on this, and then requests shutting down the PC, it blocks the shutdown.
How do I prevent my open dialog box from blocking the shutdown?
I'm assuming you're using WinForms since you didn't mention WPF. You can't use a MessageBox if you want to control closing behavior. You'll have to build your own screen to act as a message box and use the ShowDialog method to display it. Your screen can handle the FormClosing event to detect when Windows is shutting down:
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.WindowsShutDown)
{
//...
}
}
So you'll want to allow the screen to close in this case and perhaps take other action for other types of close signals. To prevent the screen from closing, set the Cancel flag on the FormClosingEventArgs parameter to true;
I am coding a Windows form based application in C#.
When I click on the red cross(x) on the top right corner of the windows it should not stop the execution of the program. It should instead go to next part of the program. What do I need to do in order to have my program behave this way?
You can use the form closing event to cancel the closing of the form. In the designer click the lighting symbol in the properties and double click the form closing entry. This should make the code for you. It should make a function a bit like this:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
}
You need to add the e.Cancel that will stop the form closing