I have a user control that has a Grid as a main container. This control needs to display a modal dialog. However, when I show the dialog (implements ChildWindow) from the control, nothing happens, no errors and no dialog.
MyDialog dialog = new MyDialog();
dialog.Show();
If ChildWindow is something that can only be displayed from the main page and not user control, what's my alternative?
Solved the problem by creating a user control and putting it in the same grid location as the original control with Visibility:Collapsed. Every time I'd need a modal dialog, I'd disable the user control that is visible and set Visibility:Visible on the modal dialog user control.
This blog post helped a great deal: Silverlight Tutorial Part 6: Using User Controls to Implement Master/Detail Scenarios
Related
I'm creating a WPF application and I have 3 Windows (MainWindow, Window2 and Window3). When I start the project Window2 loads right after my MainWindow is loaded. And when I click a Button, Window3 opens
Window3 w3 = new Window3(this, this.window2);
w3.ShowDialog();
but I'm not able to do things (click controls etc.) in Window2, I know that ShowDialog() method is disabling other open Windows but is there a possibility to access using those controls in Window2. How could I get access to Window2's functionalities when Window3 is open?
PS.(Sorry for asking a stupid question but I'm beginner in WPF)!
You can access System.Windows.Application static class's Windows collection to have list of all currently opened windows. Then you can iterate the collection and find your window by type or some other criteria. One way would be:
var window3 = Application.Current.Windows.OfType<Window3>().FirstOrDefault();
Edit:
In comments to the question you stated that you were opening window using w3.Show() method. That opens window in non modal way. While after editing the question w3.ShowDialog() opens the window in modal way.
You can learn more about modal windows at MSDN
A modal dialog box is displayed by a function when the function needs additional data from a user to continue. Because the function depends on the modal dialog box to gather data, the modal dialog box also prevents a user from activating other windows in the application while it remains open.
So to be able to switch focus between windows they should be non modal and opened using Show method instead of ShowDialog.
So here's the idea of it...
I have an application that I am designing with WPF. It has a Main Window with a frame inside to navigate through pages. The navigation aspect is done through the window (kind of like a template with a footer that has the navigation controls) and the pages have the individual content. On certain pages I would like to have an ADD (+) button that causes a popup that has a form inside to add personal information to the database (First name, last name, address, .etc) While this popup is open I would not like them to be able to access any other part of the application until they press OK or CANCEL. I'd like to be able to call this popup from the individual pages unless there is another workaround.
Any ideas or assistance would be appreciated!
some wpf popups Here and Here.
I am new in MVVM world. I have a question about the child window and I want some explanation. I have some collection of data and I am displaying it in the datagrid of main window. I want to select a item from collection and want to display that data in some Modal Window, Dialog or Popup. I want to edit that data and these changes should be reflected in the datagrid of main window.
Can anyone tell me what is good choice among Modal Window, Dialog and pop up. I am using MVVM Light Toolkit.
In my opinion choise between modal and non-modal window depends only on the UI experience you want to achieve. If for some reason update of the row item can't be done simultanously to other actions on the grid items you need modal one.
As described here Dialog boxes overview
A modal dialog box is displayed by a function when the function needs additional data from a user to continue. Because the function depends on the modal dialog box to gather data, the modal dialog box also prevents a user from activating other windows in the application while it remains open.
Modal dialog would be easier solution as you dont need extra validation on the row you are editing - you simply can edit one row at the time (and I assume you it wouldn't be possible to remove this row in main view while editing in edit window).
If you want to have changes done in child window reflected in your main grid, just use observable collection of items in your main view and pass certain item from this collection as a DataContext of your child window.
New Thought, Maybe I am looking at this totally incorrectly. So Here is exactly what I am trying to do in case there is another option I am not aware of.
I have a WPF app, the main window shows a smaller dialog window using ShowDialog(), when a user clicks on the parent window that showed the dialog, I need to make the dialog window, flash, shake or blink.
AresAvatar posted a link that looks like it might be able to use, but is there another option I am not aware of?
My original Question.
Mouse click event when Modal window's parent is clicked in WPF app?
I have a wpf app that shows a modal window using ShowDialog().
I would like to fire an event when the user tries to click the parent window that is now disabled.
Is it possible on the parent to receive a click event when it has shown a modal window?
When I attempted this using an interaction trigger, the events never fired on parent window.
Otherwise, what suggestions / options are there.
Thanks
No WPF events are sent under these conditions. The only Windows message I can see that gets sent is WM_WINDOWPOSCHANGING. You could check for that message, and check if the window was disabled when it occurred. Here's a good article on checking WM_WINDOWPOSCHANGING.
Edit: that link seems to be dead. Here's an example on StackOverflow of checking window messages.
I know this is an old question but I'll post my solution in case any one needs it.
Set the dialog.owner prior to calling ShowDialog().
var dialog = new DialogWindow();
dialog.owner = MainWindow;
dialog.ShowDialog();
The result is that clicking on the main window, brings the dialog window to the front and makes the dialog window flash.
Suppose multiple Modal Windows shown above each other.
All of those have ShowInTaskbar = false, which means that in the TaskBar you only see the MainForm and all Modal Windows are hidden.
Now you press ALT+ TAB and the most upper modal Windows disappears. But you cannot get it back in front.
How should be this done correctly in your opinion?
If a modal window is getting stuck behind the main form, it sounds like you are not setting its owner. When you call showDialog(), you need to pass in the main form like this:
modalWin.showDialog(mainForm);
Any time you call showDialog(), and your program has another form that should be underneath, it is best to pass it as the owner. If you show modal window when there is already a modal window up, then pass the first modal window as the owner.
OK Just to complete it:
This is how to set an Owner to be a Winform for a Winform:
form.ShowDialog(ownerInstance);
This is how to set an Owner to be a Winform for a WPF Window:
MyWpfDialog dialog = new MyWpfDialog();
new System.Windows.Interop.WindowInteropHelper(dialog).Owner = ownerInstance.Handle;
dialog.ShowDialog();
This is how to set an Ownder to be a Wpf Window for a Wpf Window:
.Owner = Window.GetWindow(ownerInstance)