I have popup on my current application. There is one image inside popup control. Now when I click on that image, I want to have object of main app window.
When I write this, it gives me null.
Window window = VisualTreeHelpers.FindVisualParent<Window>(Image);
And When i write this, it gives me object of POPUP windo, not application window.
window = Window.GetWindow(Image);
How would I get main application window from Popup Image control ?
Application.Current.MainWindow
MainWindow is automatically set with a reference to the first Window
object to be instantiated in the AppDomain.
You can specify a different main window by setting MainWindow
assigning another Windows object to the MainWindow property.
Link to MSDN page is here.
Related
How can I iterate to the window control from a form in the below hiearchy?
Windows.Forms--> WPF UserControl --> WPF Window(Using ShowDialog).
LogicalTreeHelper.GetChildren does not catch the Window object.
A window that is opened by calling Show does not automatically have a relationship with the window that opened it; specifically, the opened window does not know which window opened it. This relationship can be established using the Owner property and managed using the OwnedWindows property. FRom here - Window.Show Method()
But you can't set Owner for your WPFWindow because 'Owner' property can get only WPFWindow but you have as owner WinForms window. Maybe you can just save WindowControl as instance variable in you class so then you can get it any time you want.
WPF 4.5
I've got an app where I show a modal Window from my app's main Window by instantiating it, setting its owner to be the main Window, and then calling ShowDialog(). The modal Window has "Topmost=true". The main Window does not.
When I run my app the modal Window shows in front of the main Window, and it is kept in front of the main Window just as expected. However, I can simply click on the main Window behind the modal Window to Activate the main Window and manipulate it...I can even close it!
In my humble opinion this is definitely not the desired behavior for an application with a modal Window. I'm confused as to why WPF handles it this way. More important, I need a solution that will keep the modal Window in front while also blocking access to the main Window behind it (isn't that supposed to be a basic function of a modal Window?)
I believe this desired behavior has always been the default behavior when using ShowDialog in WinForms (way back in the day.) What am I missing here, and how can I get this working with WPF?
You have to set the owner window before ShowDialog :
modalWindow.Owner = RootWindow;
I have a MainWindow in my WPF app.
This MainWindow has a menu on the left and when a menu option is selected a UserControl is loaded on the right.
This is similar to Master Pages in asp.net
What I want to do now is to have a modal window show from the UserControl which will only allow the user to interact with the modal window.
I have seen examples of the Main Window showing a modal window (http://www.codeproject.com/Articles/36516/WPF-Modal-Dialog) but not sure on how to load this from a UserControl.
There's this: dialogs and mvvm but this is the best example I've seen of dealing with it: mvvm and closing forms
The first link I've not used and stumbled across while looking for the second link to post that here. The second link has two downloads, you can ignore the _service download, it's basically the same.
One way in WPF is this method
Add a new Window to the project.
Add other controls onto the window as needed.
In XAML name the window such as x:Name="MyWindow"
Put on Dependency properties on the window and have each of the controls bind to the window's data context such as {Binding MyText, ElementName=MyWindow}. (Note I still use, even for WPF these Visual Studio code snippets to add different dependency properties, these save time for a very redundant operations of adding them: Silverlight Snippets.
In the location where you want to launch the model dialog use this example:
Example:
var about = new About(); // Create the new window
// I've added a CompanyName dependency property.
about.CompanyName = "OmegaMan Industries";
about.ShowDialog();
I have an application which starts with a simple start screen allowing the user to select either New or Open a project. When selecting New I have a new window displayed which is a wizard that collects data to be passed to the Main window.
I create a new Window for the Main window and show that.
Then I close the wizard easily enough with this.close();
But how do I close the initial window which is the Startup URI window?
Application.Current.MainWindow.Close();
Pass the Startup window to the main window as a constructor parameter or property, then call Close() on it.
I have a WPF app with a Window (RootWindow) with a Toolbar and a Frame (ContentFrame). Initially the Toolbar is hidden.
I load a Login UserControl into the Frame and when the user correctly logs in I'd like to close the UserControl and then make the Parent Window toolbar visible.
Seems such a simple thing to do.
However, you cannot close a UserControl from within the UserControl. So how do I break out of the UserControl so I can remove it from the RootWindow (ContentFrame.Source=Nothing) and also make the toolbar Visible.
I can get a handle for the Parent Window with the following code but I cannot access the controls within it
Dim parentWindow As Window = Window.GetWindow(Me) 'Get a handle for parent window
Ideally, I'd like to be able to access Parent Window Controls from within a Child UserControl or at least be able to Trigger an event in the Parent Window from the Child UserControl.
To find the parent in the hirearchy you can use this code:
http://www.hardcodet.net/2009/03/detecting-double-click-events-on-the-wpf-datagrid
Although the problem solved in above article is for DataGrid, the code to find parent is generic enough and should work in your case.