I want to prevent my desktop application from being maximized. It should not become maximized by any means - by double clicking on title bar, or by clicking Windows + Up arrow on the keyboard, etc.
-> I disable both the MaximizeBox and MinimizeBox.
-> I also set the MaximumSize and MinimumSize for my WinForm
Still when I press Windows + Up arrow, my win form Shifts to top left of the screen, I mean it gets maximized.
So please tell me any way to prevent this thing happening...
There are actually two completely separate issues at work here. Granted, they look basically the same from a functional perspective, but from an implementation-model perspective (as Windows itself would naturally use) they are unrelated.
As others have answered, you can prevent your form from being maximized by setting its MaximizeBox property to false. This removes the WS_MAXIMIZEBOX style on the form's underlying window, which prevents the window manager from allowing the window to be maximized. It disables the maximize box on the window's caption bar (the one between the minimize box and the close box), disables the "Maximize" option on the window/system menu, and any other methods of maximizing a window that I may have forgotten.
However, this has nothing to do with the Win+↑ keyboard shortcut, which invokes Aero Snap the same as would dragging the window to the the magic position sat the edges of the screen. The window manager, whether as a result of a bug or a feature of Aero Snap, still allows you to effectively "maximize" windows that should not otherwise be maximized. Setting the MaximizeBox property doesn't affect this, so if you truly want to prevent the user from changing the window's size this way, you will need to disable Aero Snap's effect on your window.
Unfortunately, there's no method (at least, not to my knowledge) of programmatically disabling Aero Snap on a per-window or per-process basis (also see this related question). If the user has Aero Snap enabled, you can assume that they want that behavior and applications aren't supposed to tamper with it. The only thing you can do is completely disable resizing your window. In WinForms, you do that by setting the FormBorderStyle property to one of the following: FormBorderStyle.FixedSingle, FormBorderStyle.Fixed3D, or FormBorderStyle.FixedDialog. If you still want your window to be resizable in other ways, you will need to write the code to handle that manually, which is not a particularly easy task.
Thus, I encourage you to very carefully consider whether this is really necessary. All other non-maximizable windows accomplish this simply by setting the MaximizeBox property (or doing the equivalent in their UI framework), which means that they can still be effectively maximized via Aero Snap. If this works for everyone else's windows, including those that are part of Windows itself, it should probably work for you.
The form has a property called MaximizeBox - set this to false.
In regard to your second question, check out this question and it's answers for the best ways to implement keyboard shortcuts in WinForms.
this.FormBorderStyle = FormBorderStyle.FixedSingle;
That line of code will prevent the user from re-sizing the Window.
In addition to that you hide/disable the maximize box and that should do what you asked.
To disable the maximize box use this
this.MaximizeBox = false;
To hide the maximize box use this as well
this.MinimizeBox = false;
If Maximize and Minimize are set to false the buttons disappear.
Setting the MaximumSize equal to the Size (or some size) at least stops the windows from going full-screen. It still snaps to the top left corner but it's still a window at least and looks right - like it's Windows being stupid instead of your program.
You can prevent the windows snapping to the upper left corner by setting:
private void toolbox_Move(object sender, EventArgs e)
{
this.WindowState = FormWindowState.Normal;
}
in the move event of the form.
There is a property of the Form class named "MaximumBox" you have to set False in the properties window of your form... This actually will disable the form from being maximized by any way... Also if you want to control your form sizes you can work with such properties as "MinimumSize, MaximumSize" setting their values at your discretion or creating an event handler for the MaximumSizeChanged and MinimumSizeChanged events...
You can try to RegisterHotKey Win+Up if your window or application is activated and unregister this hot key if it is deactivated. You must catch the hotkey and return appropriate value to prevent further processing.
Look at WM_ACTIVATEAPP, WM_ACTIVATE and WM_NCACTIVATE. The first can be used if you want to disable the Win+UP for all your windows.
Set formborderstyle to fixedsingle
Maximizebox=false
Set the maximumsize to the size of winform's default size
Ex: if size(646,385) then set maximumsize(646,385)
One thing you can do is set the MaximumSize and MinimumSize in the same value but not 0,0.
It's easy easy! Apply the folling code to maintain window's state to normal when a resize event is triggered.
protected override void OnResize(EventArgs e) {
base.OnResize(e);
WindowState = FormWindowState.Normal;
}
Related
I have a C# winforms application with a fixed-size starting dialog. After making some changes entirely unrelated to this form, the form now opens maximized, filling the entire screen with the actual content still at the regular size in upper left corner. Dragging the title bar down a bit with the mouse causes it to restore to its appropriate size.
The form has
MaximizeBox = False
StartPosition = CenterScreen
FormBorderStyle = Fixed3D
Does anyone have any suggestions what might be causing it to open maximized, and how to stop it?
Edit:
WindowState = Normal
is also set.
Edit 2:
I found the problem. My update routine was shutting down the original process so it could be updated (inappropriately, but that is a different bug), then restarting it with code I had borrowed from elsewhere, and part of that restart code was:
process.StartInfo.WindowStyle = ProcessWindowStyle.Maximized;
Thank you for the assistance. Though no direct answer was given (nor expected with the spotty information), it did point me in the right direction.
The Window being Maximised is normally set on the forms "WindowState", Light Reading. You need this to be set to WindowState.Normal. It's possible someone's set it to maximised in the designer? or somewhere else in the code. the 3 lines of code you have shown are not the problem.
Edit:
You need to do some investigation if you cant give us code from your form, Hook into some resize events, and see what's triggered it off. Forms dont just start up maximised unless they're told to and maximizing a window triggers a resize event.
I have two windows form and both set the topmost property to true. But the form border style of the one form is Set to "None". The other form has border. When these two forms launch together, the one without the border is always on top and overlap the other form. How do i make the form with border always on top? thanks.
I suggest you to start the form with borders last or set other form TopMost property to false.
[Edit] I sugest you to look at the Forms Owner property - http://msdn.microsoft.com/en-us/library/system.windows.forms.form.owner.aspx.
formWithoutBorders.AddOwnedForm(borderForm);
borderForm.Show();
Show (make Visible) the window that is supposed to be on top, later as the other window.
Topmost only works between non-topmost and topmost windows. Between Topmost windows, the normal rules apply of what window to show.
To understand why this is happening, I recommend Raymond Chen's What if two programs did this article
How do I prevent resizing my application window?
How can I do that?
On the main Form (or any Form that you don't want to be resizable), change the FormBorderStyle property to Fixed______ (FixedSingle, Fixed3D, FixedDialog, FixedToolWindow).
Another way is to define your form size and set the actual size as MinimumSize and MaximumSize via the properties.
This doesn't change your BorderStyle and the end user can't modify the size of the form.
There are a few of workarounds for this:
Set maximum size property to a value you prefer. If you do not want the application window to be shrunk as well, then set a minimum size property. If you prefer the application to have the exact same size as that of design time, then set both maximum size and minimum size as size of your window. (Once you set maximum size or minimum size from the designer, you can't resize your window programmatically, unless you re-set maximum size and minimum size programmatically again)
Set FormBorderStyle to FixedSingle or FixedDialog. The difference in looks wont be noticeable for untrained eyes, but one considerable difference I'd found from my experience is that, when you make it FixedSingle, you can still change the size programmatically. With FixedDialog its not possible. That's a huge advantage for FixedSingle property. (If you want to change size of your window programmatically here after going for FixedDialog, then you got to programmatically change FormBorderStyle first, which would create a slight blink effect when running the application).
So simply go for FixedSingle. And to make sense, do the following:
a. Set maximize box property to false.
b. Set SizeGripStyle to Hide. (#colithium points this)
Try this:
Change FormBorderStyle to Fixed(Single, 3D, Dialog).
You can change the ResizeMode property of the Window object to CanMinimize or NoResize in the xaml or via the designer.
There is a problem to find these properties in older versions of Visual Studio, like Visual Studio 2008 and ResizeMode does not appear here.
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
}
How can I create in C# a Windows Form without taskbar (where the minimize and maximize button are placed).
Thanks.
That's called a Title bar.
Set the FormBorderStyle property to None.
Set Form.ControlBox to false and Form.Text to "". This is not the same as the TaskBar (which is the strip along the bottom (typically) in Windows)
To completely remove the title bar you'll need to set the FormBorderStyle to "None" as indicated by SLaks; however, you'll loose all of the other properties of the form's border. If you want anything more customized than that I'd recommend you override the form's OnPaint method but if you don't know what you're doing there your in for a world of hurt.
I have created a taskbar using tabcontrols which works similarly to the Windows taskbar.
I want to make my own taskbar fixed on top of the windows.
It should not be movable, resizable, and it should be "docked" to the top.
I have not tried to do this, but my first attempt would be the following:
set form to be 'TopMost'
set border to 'None'
set Location: (0,0), Size(Screen.Width,H), where H is the Height you want your form to be
set 'ShowInTaskBar' to false
Something you might consider: how will you handle multiple screens?
You'll likely want to add a context menu allowing you to exit the application, since it won't have the normal system buttons. Also, you might consider what happens when the user presses ALT-F4: will your program close? If not, you'll need to add some code in the FormClosing event handler to cancel closing.
Hope this sets you in the right direction!
A long long time ago Jeffery Richter demonstrated how to do a true taskbar in a sample called AppBar (I've used it myself as a boiler plate), so here are some pages that may be of interest:
http://www.google.com/search?q=Jeffrey+Richter+appbar+c#