wpf

Windows Multiple User Application Best Practices

I am developing a WPF application that will hook into a SQLLite database and I have a number of reservations around multiple users: When I install my application should I assume that each windows user account will mean only one user of my application or should I include a login for my app (drawback is that the user will have to log in ...

WPF Dispatcher {"The calling thread cannot access this object because a different thread owns it."}

first I need to say that I´m noob with WPF and C#. Application: Create Mandelbrot Image (GUI) My disptacher works perfektly this this case: private void progressBarRefresh(){ while ((con.Progress) < 99) { progressBar1.Dispatcher.Invoke(DispatcherPriority.Send, new Action(delegate { ...

Show elipses where text will be truncated as per iTunes

I a building an application with a similar layout to iTunes i.e. it has a sidebar that doubles as a menu. Some of the text will exceed the boundary and rather that having it be truncated I would like to show ellipses (see line image below "Purchased on My iPh..."). How would I go about this in WPF? Suppose I made the boundary movabl...

Show underlying applications mouse cursor when hovering over visible section of my application.

I am writing a WPF application that allows the user to draw over the entire screen when the right mouse button is held down. I use a full screen transparent overlay form to achieve this, however, as I draw lines with the mouse, what's happening is that the portion of my window that contains the line is becoming visible (as expected). The...

problem running system.net.webclient and process.start off a control event

The following code causes my vs 2008 wpf project to hang, I'm not sure why. Both Part 1 and Part 2 work perfectly fine independently, but when I run them together on an control event (click a button for example) the program hangs. I've also tried shell execute for part 2 - same results. However, this code when run within the form loaded...

Can I create a standalone (not ran in browser, having full trust) application with Moonlight?

I look forward to develop a WPF MVVC application which is to be ran both on Windows with .Net Framework and Mac/Linux with Mono. As far as I understand the only part of of WPF implemented in Mono is Silverlight as Moonlight. As far as I've read it is possible to develop a standalone application with Silverlight 3, but is it possible wi...

WPF: Update Listbox automatically C#

Hi, I have two WPF windows developed using the surface SDK, one that is a data entry form, and the second dispays the data in a listbox. The listbox displays the data perfectly but when I add a new record using the data entry form, the listbox is not updated until I reopen the window. Is there a way to automatically update the listbox t...

WPF Prism interesting sample application

Hi, I'm looking for a good example of WPF Prism (or Composite Application Guidance) sample code that would not be as complicated as the StockTraderRI or as simple as HelloWorld but could explain all the important aspect of writing an application with Prism, preferably with database connection. Tutorials are also appreciated. I have googl...

Configure ListBox in WPF so that I will be possible to select multiple items without holding CTRL key

I have a Listbox that allows user to select multiple items. Normally user can do that by holding CTRL key and clicking the item he or she wants to select. Is it possible to configure this listbox so that the user will not have to hold the CTRL key when selecting items ? So that he or she will just click the item (without holding anythin...

Change mouse cursor while left mouse button is pressed?

Hello, I need to change the mouse cursor while the left mouse button is pressed. Unfortunately changes to the mouse cursor are ignored until the left mouse button is released. Is there any workaround to this? Thanks for any hint! (I'm using WPF and C#) EDIT: Sample Project: http://cid-0432ee4cfe9c26a0.skydrive.live.com/self.aspx/%c3%...

Can you change the style of an object based on a property within the object in WPF?

I have a class for message, and the objects are being displayed in a ListBox and there's a property for the message based on whether it's sent to or from the user. Is there a way to create two different styles and change them depending on this property? ...

Programatic re-evalutation of MVVM command's "can execute" state

Hello! I'm writing a WPF application using the MVVM pattern, based on the following article: WPF Apps With The Model-View-ViewModel Design Pattern I have two buttons on my View with the buttons' "Command" property bound (with data binding) to a given instance of the RelayCommand class (see "Figure 3 The RelayCommand Class" from the art...

How to automatically scroll ScrollViewer - only if the user did not change scroll position

I would like to create the following behaviour in a ScrollViewer that wraps ContentControl: When the ContentControl height grows , the ScrollViewer should automatically scroll to the end. This is easy to achive by using ScrollViewer.ScrollToEnd(). However, if the user uses the scroll bar, the automatic scrolling shouldn't happen anymore....

Is there anything similar to WPF and MVVM in Java world?

Is there anything similar to WPF and MVVM in Java world? ...

WPF WriteableBitmap

I'm using WriteableBitmap on an image of type Bgra32 to change the pixel value of certain pixels. I'm setting the value to 0x77CCCCCC. After calling WritePixels, the pixels I set to 0x77CCCCCC show up with a value of 0x77FFFFFF. Why does this happen? How do I make the pixels have the correct value? UPDATE: I found out that what is...

WPF XAML: How to trigger style change in ListBoxItem ancestor to user class?

I have an ObservableCollection of items of my class "PlaylistItem" that implements INotifyPropertyChanged. The collection is databound to a ListBox and everything else is working. I want to know what markup to use to trigger a style change of the wrapping ListBoxItem based on a property (e.g. "Playing", bool) of the PlaylistItem. How ...

How to duplicate the "background" applied to text in Aero window titlebars?

All windows in Aero have this kind of whiteish background on their text. I'd like to create an equivalent of this effect for a GlassWindow I'm using that has a TextBlock in the label area, but I'm not really a designer so I have no idea how to approach this. How can I reproduce this background effect? ...

Xaml Namescope and Template Question Concerning WPF ContextMenu

Everything in the code below works except for the binding on the ContextMenu. This is evidently due to the fact that the ContextMenu is located inside of a Style, which puts it in a different namescope from the rest of the xaml. I am looking for a solution where I won't have to instantiate a ContextMenu in the code-behind, since the ap...

WPF - How do I style a row based on a binding property value?

Hey! So I am trying to bind a collection of objects (IList<>) to a WPF datagrid. I would like to make the row background a different color if the 'artist' property is null or empty. I am checking the value stored at the property on the LoadingRow datagrid event. Currently my implementation seems to style all of the rows with an empty or...

Programmatically Setting ControlTemplate Item

I'm having trouble figuring out how to programmatically setting the "Stroke" of my arrow. I'm using these buttons in a menu bar and I want the one currently selected to have it's arrow change to green and all the others gray. <Style x:Key="FooterGrayButtonStyle" TargetType="{x:Type Button}"> <Setter Property="HorizontalConten...