I have window form in my WPF Application when I open new window from my form I used to set the owner of the new window to my opening window. But when I have converted the parent window to user control the line
objSearchCareGiver.Owner = this;
gives error
Cannot implicitly convert type 'MyNameSpace.ucUserControlto 'System.Windows.Window'
can anyone explain why is this so?
Do you get a runtime error or compile-time error? I'm guessing your error is because the Window.Owner property is of type Window and user controls aren't valid. Even if a user control is a subclass of Window it may be that user controls can't own child windows. Specifically, if you look at the documentation for the Window.Owner property, it talks about the property establishing a relationship between the parent and the child form. This relationship mostly has to to with propagating visual changes from the parent to the child (e.g., closing the child window automatically when the parent window is closed, minimizing the child when the parent is minimized). These behaviors don't really make sense with a user control as the parent.
Related
I'm creating an WPF desktop application.
Desc : One main window(Parent) for whole application which includes display, completely docked display.
"X" no. of child windows, whenever whichever child is opened, On minimizing of this child, the child should get minimized on the parent window [Currently, it goes behind the main window]
WHAT I NEED : Whenever child is minimized it should not go behind, it should be minimized on parent window.
Note : I cannot use wpf.mdi.dll, since I have a data display on my main screen(Parent window, Display will be completely docked)
Perhaps you can use AvalonDock(free) or Telerik Docking(not free).
After setting
Owner = this;
ShowIntaskbar=false;
The thing worked for me
In winforms we have objForm.Owner and objForm.Parent. Whats the difference between these two.
I opened a form B from form A as a dialog and was expecting to access form A's public properties from form B using ParentForm property but finally ended up using Owner property instead as ParentForm was null !!
A parent-child relationship exists between windows when the child is embedded in the parent window and cannot move outside of its bounds. Examples are child controls like TextBox and Panel. And the MDI windowing model, MDI child windows are embedded in the MDI parent and parented to the dark-gray MDI client window.
An owned window applies to top-level windows and primarily controls their Z-order. An owned window is always on top of its owner. It is also minimized and restored along with its owner. Examples are tool windows and dialogs.
Note how a Form is normally a top-level window and does not have a parent. So wouldn't have a use for its Parent and ParentForm properties. It can however be turned into a child window by setting its TopLevel property to false. Sample code is here.
Form.Owner - Is the Form that "owns" this form. For example Find/Replace dialog would be Owned by Notepad's main window. If you
minimize the main Form, the owned form will minimize, if you restore
the main form, the owned form will restore
ContainerControl.ParentForm - Is the Form that this ContainerControl is ultimately placed on
Check this article. Their is explained Parent too.
Following problem. In my application you can open multiple modal windows. Every window is dependent on the previous opened window (hierarchical). Means that when a child window is opened, the user cannot drag this child window aside and interact with the parent window.
How can I achieve, that the surface behind the top child window freezes? I use RadWindow, by the way.
Try setting the child RadWindow's Owner property to its parent RadWindow.
The key was the bool WindowBaseAutomationPeer.IsTopmost Property of the RadWindow class. Telerik Documentation
When I called show() of MDI child from its parent for the first, got the following error...
Method: CheckReleased Line: 0 Column: 0
[Exception]: Window handle already exists.
What is the cause for this error and how to overcome it?
Call to show() of the same child for the second time is not giving any exception. why it is failing for first time only?
Iam using Dotnet 3.5 framework...
The reason could be, Are you trying to show some child controls before the Form shows up.?
This error normally show off, if you try to make some child control visible (in the form), before the window get created. Because all the child controls in the forms needs it's parent handle.
Append a MenuStrip to an MDI Parent Window (Windows Forms) c# (or) mdi child menu in wpf
http://keranservices.blogspot.in/2014/02/append-menustrip-to-mdi-parent-window.html
I'm trying to create a custom MessageBox by using a WPF Window that is called with ShowDialog().
So far, I've managed to implement everything, except for one thing.
As you know, when you use MessageBox.Show("text"); you cannot set the focus or click the parent window (the one that called the MessageBox). If you do try to click the parent window, the MessageBox will blink briefly in order to alert you that you must close if first.
Windows created with Window.ShowDialog();, however, do not show that behavior. In fact, while you cannot set the focus to the parent window, the child (called with ShowDialog()) will never blink briefly.
My question is, is there any way to implement that in WPF? I've been searching for an answer but I must admit, I am stumped.
Thanks everyone!
You need to set the Owner of the modal window correctly, e.g. using the following code from within the owning window:
Window win = new SomeModalWindow();
win.Owner = this;
win.ShowDialog();
You would have to set Owner property of the child Window to the parent Window. See the MSDN Documentation here.