I have a form which can be set to .Enabled = false;. The client still might click on it by accident which can turn out to be very annoying since every time you click on it you will get this ding sound. I was wondering whether it's possible to disable that or not.
Instead of setting Enable to false, you can hide the whole title bar with those two lines of code:
this.Text = "";
this.ControlBox = false;
This will result in user not being able to move the window, you can store the original title then restore it later if you want.
You could register to the Move event for the form and restore its location to wherever you want it to be (it should zero in to the top left corner IIRC).
Related
Universal app does not allow to remove or disable the close button it seems. We can hide it by going full screen. But when moving cursor over it, brings title bar back. Is there any way to remove the close button?
Reason : I am working on screen time. After allowed time gets over, I want to block the screen. I should remove close button so that user cant get over my app.
Edit : Removing close button wont help completely. It is a part of work. I am just asking how to remove it.
In Windows 10 version 1703 (build 10.0.15063) and beyond, you can prevent the app from closing, using the SystemNavigationManagerPreview class.
Add this to your app manifest:
<Capabilities>
<rescap:Capability Name="confirmAppClose" />
</Capabilities
You need to have the rescap namespace at the Package element:
xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
In the constructor of your main form, add:
var sysNavMgr = SystemNavigationManagerPreview.GetForCurrentView();
sysNavMgr.CloseRequested += OnCloseRequested;
OnCloseRequested can be implemented as follows:
private void OnCloseRequested(object sender, SystemNavigationCloseRequestedPreviewEventArgs e)
{
var deferral = e.GetDeferral();
e.Handled = true;
deferral.Complete();
}
With current released API, we are able to customize the color of these three buttons in title bar. But there is no property or method could be used to disable or remove these buttons.
In UWP, we can use ApplicationView.TitleBar | titleBar property to get the title bar like following:
ApplicationViewTitleBar titleBar = Windows.UI.ViewManagement.ApplicationView.GetForCurrentView().TitleBar;
This property's type is ApplicationViewTitleBar. It only has several properties that can customize the button's color like:
titleBar.ButtonBackgroundColor = Windows.UI.Colors.White;
titleBar.ButtonForegroundColor = Windows.UI.Colors.White;
titleBar.ButtonHoverBackgroundColor = Windows.UI.Colors.White;
titleBar.ButtonHoverForegroundColor = Windows.UI.Colors.White;
titleBar.ButtonInactiveBackgroundColor = Windows.UI.Colors.White;
titleBar.ButtonInactiveForegroundColor = Windows.UI.Colors.White;
titleBar.ButtonPressedBackgroundColor = Windows.UI.Colors.White;
titleBar.ButtonPressedForegroundColor = Windows.UI.Colors.White;
Using these properties may make the close button invisible like:
However this won't actually hide these buttons. Users can still minimize or maximize the app and when the pointer is over the top right corner, they will still see the close button.
From Windows 8.1, if we want users to use only an application and do nothing else including closing the application, we can use Kiosk Mode. For more info, please see Enable Kiosk Mode in Windows 8.1 and Set up a kiosk on Windows 10 Pro, Enterprise, or Education. However this won't meet your requirement as you want to block the screen after allowed time gets over.
So UWP may not be the best choice for your requirement. You may try to implement it with classic desktop apps.
in App.Xaml.cs add this code :
// Collapse Title bar
CoreApplication.GetCurrentView().TitleBar.ExtendViewIntoTitleBar = true;
Window.Current.SetTitleBar(null);
ApplicationView view = ApplicationView.GetForCurrentView();
view.TryEnterFullScreenMode();
C++ Version
// COLLAPSE THE TITLE BAR
Windows::ApplicationModel::Core::CoreApplication::GetCurrentView()->TitleBar->ExtendViewIntoTitleBar = true;
Window::Current->SetTitleBar(nullptr);
Windows::UI::ViewManagement::ApplicationView^ view = Windows::UI::ViewManagement::ApplicationView::GetForCurrentView();
view->TryEnterFullScreenMode();
On the Windows Form application I have a Lamp image (a black and white one, and a bright one. For OFF and ON respectively).
Using the Button how can I achieve the scenario such that same button will turn the property of the image (pictureBox in my case) to show the Lamp as ON and pressing the same button again will turn the Lamp off.
I am accessing the 'Visible' property of picture box.
Put two images on top of each other and get the button to switch which one of them is enabled.
In the form designer you make one of them visible and the other non-visible. The code in the button handler can then be something like:
lightImage.Visible = !lightImage.Visible;
darkImage.Visible = != lightImage.Visible;
That will swap which one is visible and eliminate the need to keep state elsewhere.
A bit late to the party, but you can use a checkbox and set the appearance to button.
I think that would do what is expected by the original post.
I'm not sure about the way to put 2 images over each other, but if you want to reach the same effect:
place the 2 image files in your project resources
in the click event of the button, toggle the button image depending on a setting:
this would be in the click event:
Properties.Settings.Default.IsOptimizedForTracer !=Properties.Settings.Default.IsOptimizedForTracer;
if (!Properties.Settings.Default.IsOptimizedForTracer)
{
btnOptimizeForTracer.Image = Properties.Resources.TracerOFF;
return;
}
btnOptimizeForTracer.Image = Properties.Resources.TracerON;
I was wondering if there are any gotchas for making a form completely transparent (as opposed to hiding it). For instance, I know that these are things that got my by surprise when hiding a form:
If a form is hidden, you cannot interact with its controls (can't add HTML to a webbrowser control, can't push a button, etc.)
Changing the WindowState (minimized, maximized, etc) of a window while it is hidden will cause the window to appear outside the scope of your work area when the form is shown again.
Has anybody run into similar problems (or completely different ones!) while using a form with opacity set to 0 (completely transparent)?
If you don't need the form anymore, hide it.
But if you still have a task or timers running in the form you want to keep, or you want to keep the user's input, then you'd do good to set the opacity to 0%.
This is what I do when I want a form to be hidden, but still active:
frmMain.Opacity = 0; // To make it invisible.
frmMain.VisibleInTaskbar = false; // To make the taskbar entry of the form disappear, and to make sure that the WindowState isn't changed.
frmMain.Enabled = false; // To make sure the user doesn't type something in the form, or presses a button (by pressing enter) by accident.
From the up votes for my comment, I guess I'll submit it as an answer. I would discourage using Form.Opacity = 0. Even though you can disable the form to prevent accidental interaction, I would think the transparent form would overlay other windows and confuse the user as to why he can't interact with windows behind your transparent one.
As for the gotcha's for Form.Hide(), I typically queue form responses so that when the form returns into view (or visibility), it goes through the queue to process actions (i.e. changing FormState). Changing the form while it's hidden can also really confuse the user.
I have a NotifyIcon which shows Baloon Tips with some information. Is there a way to send some command to close this BaloonTip depending on my choice from within code (and not by using mouse)?
a) Click BaloonTip (normally by clicking anywhere within the TrayTip)
b) Close BaloonTip (normally by pressing X in TrayTip window).
Answering my own question:
To show BaloonTip:
NotifyIcon.ShowBalloonTip(4, "Something", "Somnething2", ToolTipIcon.Info);
To make BaloonTip dissapear right away one have to use
NotifyIcon.Visible = false;
NotifyIcon.Visible = true;
I need to create a user control in C#.Net, which can be added to the application without being visible - just like the FolderBrowserDialog. It's a new window which I'll be using often so I think this is the right way. The window will be opened by envoking the showDialog-Method as known from the other dialog.
Any Idea?
Thanks and regards,
Daniel
Since all these "invisible" controls derive from Component class, you should start by reading the MSDN article on it: http://msdn.microsoft.com/en-us/library/system.componentmodel.component.aspx.
simply set Visible to false or isn't this what you're asking for ?
A UserControl is by definition not a Form; I think what you really want is a Component. That said, couldn't you really just create a new Form class that has the functionality you want? Whenever you want to display it, create a new instance and call ShowDialog. Or, if you want to preserve state, add an instance as a class member to your parent form, call its Show method whenever you want to display it, and add an event handler to its FormClosing event to check:
if (e.CloseReason == CloseReason.UserClosing)
and, if so,
e.Cancel = true;
Hide();
(This last part is to prevent errors if the user closes the form and then tries to display again after it's been disposed.)
I think more information may be needed, but if your crating a custom user control, the control should have a .Visible property. The follow is an example of how a button can be located on the form but hidden from a user.
button.Visible = true; // shows the button
button.Show(); // Shows the button
button.Visible = false; // hides the button
button.Hide(); // Hides the button
While the button may still be on the form/control, it will not be interactible by the user. You can still perform programmatic control on the button, but essentially it is not a user control while it is 'hidden'. If you want there to be a sort of hidden button that the user can click you will need to do other things to obtain this but It doesn't should like that is what you want.
This show/hide thought process sounds a lot like pains and confusion leftover from classic VB. The old form methods of show and hide, etc., were confusing and often left me as a developer in a position to not know whether an object existed or if was merely invisible. And checking was only trivial if you used On Error Goto to prevent a null reference. So right off I would advise not to think in terms of visibility unless you are doing something with a web page and need to maintain space and state.
First, create a Windows form and add it to your project, assuming that is the type of project that you are describing. Decorate the form with the proper controls, and where applicable, create properties to allow public access to the control values. Also set the DialogResult property of the buttons that either "OK" or "Cancel" the form. Give it an appropriate border style of either Fixed3D or FixedDialog. Maybe also set the property for where you want the form to appear on startup -- center parent, center screen, Windows default, etc. The event handlers for both "OK" and "Cancel" should invoke this.Close(); to close the window.
From the calling point in the code, here's some hypothetical code to get you going in the right direction. Write something like this in the place where you want to invoke your Dialog.
int intResult = 0;
string strResult = null;
MyDialogForm frm = new MyDialogForm();
frm.Title = "Select an Item";
frm.SomeProperty = 0;
frm.SomeOtherProperty = true;
if (frm.ShowDialog() == DialogResult.OK)
{
intResult = frm.Result;
strResult = frm.StringResult;
}
else if (frm.ShowDialog() == DialogResult.Cancel)
{
// User clicked the cancel button. Nothing to do except maybe display a message.
MessageBox.Show("Canceled Task");
}
...
// Somewhere further on down, but within scope, simply repeat
// what you just did, but without having to reinstantiate the
// form Window. But if you make it that far within the same
// scope, this method might be too busy and may need to be
// factored down.
So in short:
Scrap show/hide -- its not a good
practice.
Save the form data without
using an invisible form to save it;
that's the class's job.
If the UI requires a lot of flipping back and
forth between windows, check your
design for other alternatives for
solving the original problem. Maybe a design pattern such as MVC is for you, depending upon the size and complexity of your application.
Sound good?
You can put that control in a Panel. Set the panel height = 0 visible = false when you dont want to show the control.
And do the vice versa when you want to show it.
Derive from Control, not UserControl, and in the constructor set Visible = false.
Also create an event handler in the constructor.
VisibleChanged += new EventHandler(SetVisibleFalse);
Create a method named SetVisibleFalse.
private void SetVisibleFalse(object sender, EventArgs e)
{
if (Visible) Visible = false;
}