This problem is happening when the FormBorderStyle = None and a button is used to set the WindowState. Chunks of the form turn invisible when the form is restored from a minimized state or is maximized from a normal state.
The code for maximizing and minimize:
private void MaximizeButton_Click(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Normal)
{
WindowState = FormWindowState.Maximized;
}
else
{
WindowState = FormWindowState.Normal;
}
}
private void minimize_button_Click(object sender, EventArgs e)
{
WindowState = FormWindowState.Minimized;
}
I have failed to recreate this glitch in any other winform based application of mine.
I appreciate the help , hope you all are having a comfortable covid stay.
Simply refresh the window once its state becomes maximized. Unlike WPF, Winforms doesn't have a StateChanged event, so use SizeChanged to detect if the window it's maximized, and refresh it.
private void Window_SizeChanged(object sender, EventArgs e)
{
if(WindowState == FormWindowState.Maximized)
Refresh();
}
Related
I'm working on a Win Forms project where I'm trying to create an button to toggle full screen on/off every time i click the button,so if you click once, it becomes full screen, if you click again, it becomes normal again.
please tell me how to do that.
I am not sure about the exact requirements but this should help you.
Add Form1_Load and button1_Click events.
private void Form1_Load(object sender, EventArgs e)
{
// Normal when the form opens
WindowState = FormWindowState.Normal;
}
private void button1_Click(object sender, EventArgs e)
{
// Toggle on a button click
WindowState = WindowState == FormWindowState.Normal ? FormWindowState.Maximized : FormWindowState.Normal;
}
I have an application that I do not want to show in the taskbar. When the application is minimized it minimizes to the SysTray.
The problem is, when I set ShowInTaskbar = false the minimized application shows above the task bar, just aboe the Windows 7 start button. If I set ShowInTaskbar = true the application minimizes correctly, but obviously the application shows in the taskbar.
Any idea why this is happening and how I can fix it?
EDIT: For the sake of clarity, here is the code I'm using:
private void Form1_Resize(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized) {
this.Hide();
this.Visible = false;
notifyIcon1.Visible = true;
}
else
{
notifyIcon1.Visible = false;
}
}
private void btnDisable_Click(object sender, EventArgs e)
{
// Minimize to the tray
notifyIcon1.Visible = true;
WindowState = FormWindowState.Minimized; // Minimize the form
}
There is no event handler to establish when a form's minimise request has been fired. So to 'get in' before the form has been minimised you'll have to hook into the WndProc procedure
private const int WM_SYSCOMMAND = 0x0112;
private const int SC_MINIMIZE = 0xF020;
[SecurityPermission(SecurityAction.LinkDemand,
Flags = SecurityPermissionFlag.UnmanagedCode)]
protected override void WndProc(ref Message m)
{
switch(m.Msg)
{
case WM_SYSCOMMAND:
int command = m.WParam.ToInt32() & 0xfff0;
if (command == SC_MINIMIZE && this.minimizeToTray)
{
PerformYourOwnOperation(); // For example
}
break;
}
base.WndProc(ref m);
}
and then you can merely hide the form in the PerformYourOwnOperation(); method
public void PerformYourOwnOperation()
{
Form form = GetActiveForm();
form.Hide();
}
You will then need some mechanism to Show() the hidden form otherwise it will be lost.
Another way is using the the form's resize event. However, this fires after the form is minimised. To do this you can do something like
private void Form_Resize(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized)
{
// Do some stuff.
}
}
I hope this helps.
My guess is that you also have to hide the window. To get this behavior in WPF, I have to do the following:
WindowState = WindowState.Minimized;
Visibility = Visibility.Hidden;
ShowInTaskbar = false;
Since WPF and WinForms both ultimately come down to Win32 windows, you probably have to do the same thing.
Here is one of the simplest solutions (I think so):
//Deactivate event handler for your form.
private void Form1_Deactivate(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized) Hide();
}
You can use a NotifyIcon to get the program to show up in the system tray, and watch for the window's resize event to toggle the visibility to hidden.
Here is how to watch for the window's resize event.
How to detect when a windows form is being minimized?
Here is a tutorial for using the NotifyIcon provided by CodeProject. The NotifyIcon is a windows forms element so it will still work in your application.
http://www.codeproject.com/Articles/36468/WPF-NotifyIcon
Add handler for resizing:
private void Form1_Resize(object sender, EventArgs e)
{
Visible = WindowState != FormWindowState.Minimized;
}
I'm new with c# but know c++ and c, my problem is that I can't get my form to show up again after it got minimized to the system tray.
That's the code I used to hide it:
protected override void OnResize(EventArgs e)
{
base.OnResize(e);
bool cursorNotInBar = Screen.GetWorkingArea(this).Contains(Cursor.Position);
if (this.WindowState == FormWindowState.Minimized && cursorNotInBar)
{
this.ShowInTaskbar = false;
notifyIcon.Visible = true;
this.Hide();
}
}
You need to undo the changes you made to the form to make it hide...to make it display again:
private void notifyIcon_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
this.Show();
this.ShowInTaskbar = true;
this.WindowState = FormWindowState.Normal;
notifyIcon.Visible = false;
}
}
on notifyIcon click event try:
this.Show();
(I'm not sure but this one could work too: this.Visible = true)
by the way try to handle OnClosing event on your form instead of OnResize
(I have suitable code in home, when i got there ill share it)
You can use this.Show() to show the form again after minimized. If this is not working, just tell me, will provide another solution.
I know you will be thinking "Not again this question", as I found like a hundred results when I searched for it. But when I put in the code as described on the pages here, it just minimizes to right above the start menu.
This is the code I use (I added a message box to see if the code gets triggered, but the message box never pops up):
private void Form1_Resize(object sender, EventArgs e)
{
MessageBox.Show("Works1");
if (WindowState == FormWindowState.Minimized)
{
this.Hide();
}
}
Because I don't know if it links to Form1 or Form, I have tried both, to no avail.
private void Form_Resize(object sender, EventArgs e)
{
MessageBox.Show("Works");
if (WindowState == FormWindowState.Minimized)
{
this.Hide();
}
}
Now, when you double click on the Form, it puts this line in the Form1.Designer.cs:
this.Load += new System.EventHandler(this.Form1_Load);
Do I need a similar line to trigger the minimize event?
As you can see, I am completely lost :)
Oh, and it doesn't minimize to the taskbar, as I am using the following code to hide the form on run:
protected override void OnLoad(EventArgs e)
{
Visible = false; // Hide form window.
ShowInTaskbar = false; // Remove from taskbar.
base.OnLoad(e);
}
You need the event
private void Form1_Resize(object sender, EventArgs e)
{
}
Creating Event Handlers on the Windows Forms Designer
Add a NotifyIcon component to your Form. Make sure you set an icon via the properties pane otherwise it will be invisible.
Create an event handler for the form's Control.SizeChanged event. In that event handler place the following code:
sample code:
private void MainForm_SizeChanged(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized)
ShowInTaskbar = false;
}
And then to make the form visible again the NotifyIcon.MouseDoubleClick event handler you can place the following code:
private void trayIcon_MouseDoubleClick(object sender, MouseEventArgs e)
{
WindowState = FormWindowState.Normal;
ShowInTaskbar = true;
}
The basic thing you need to know is events. Events are triggered when certain things happen to your form (or any control). For example, when the form is resized, or loaded, or clicked, an event is raised. You can hook into this event to execute your own code when the event happens.
In your case you want to execute code to minimize the form, on the event that the form is resized. So you need to hook your method to the resize event. The name of your method is not relevant, so let's use a better name:
private void HideWhenMinimized(object sender, EventArgs e)
{
MessageBox.Show("Works1");
if (WindowState == FormWindowState.Minimized)
{
this.Hide();
}
}
To hook your HideWhenMinimized method into the Resize event of the form, you have to do it like this:
this.Resize += new System.EventHandler(this.HideWhenMinimized);
If you add that line of code in the form's constructor or Load event, then your code gets called as soon as the form is resized.
How can I make the (default) Close button (at top right corner) in my application, to work it as Minimize.
Actually I want to minimize the application on clicking the cross-symbol, but exit the application, when use clicks on my menu option Exit.
I wrote this code for minimizing the form on clicking close button:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (minimize_on_close == "Yes")
{
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
}
and wrote this code for exiting the application, on clicking exit from menu options.
private void exitToolStripMenuItem1_Click(object sender, EventArgs e)
{
Application.Exit();
}
But now, when I click on Exit menu option, then also the form is being minimized, and not exiting.
Can anyone please help?
Check to see whether FormClosingEventArgs.CloseReason is equal to CloseReason.UserClosing before deciding to minimize the window. Alternatively, compare for CloseReason.ApplicationExitCall.
From the documentation for CloseReason:
Members
...
UserClosing
The user is closing the form through the user interface (UI), for example by clicking the Close button on the form window, selecting Close from the window's control menu, or pressing ALT+F4.
...
ApplicationExitCall
The Exit method of the Application class was invoked.
Try this
EDIT
May use Resize Event to do it,
private void Form1_Resize(object sender, EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized)
this.Hide();
}
Then using the FormClosing Event to cancel Close and minimize the Form as below
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
}