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  • Application.Current.Shutdown() vs. Application.Current.Dispatcher.BeginInvokeShutdown()

    - by Daniel Rose
    First a bit of background: I have a WPF application, which is a GUI-front-end to a legacy Win32-application. The legacy app runs as DLL in a separate thread. The commands the user chooses in the UI are invoked on that "legacy thread". If the "legacy thread" finishes, the GUI-front-end cannot do anything useful anymore, so I need to shutdown the WPF-application. Therefore, at the end of the thread's method, I call Application.Current.Shutdown(). Since I am not on the main thread, I need to invoke this command. However, then I noticed that the Dispatcher also has BeginInvokeShutdown() to shutdown the dispatcher. So my question is: What is the difference between invoking Application.Current.Shutdown(); and calling Application.Current.Dispatcher.BeginInvokeShutdown();

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  • deploying a styles library for plugin developers

    - by bitbonk
    I have an application that my customers can write plugins (that have WPF UIs) for. Now I would like to expose a set of styles as a library that they can use and that will help them with the development of the UIs sO they don't have to reivent the weel. How would I idealy expose those styles without actually having to deploy a lot of xaml files? How is something like this usually done in WPF so it does not break tooling support (blend, vs). How do I expose it and how does the cusomer reference those styles?

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  • Nhibernate , collections and compositeid

    - by Ciaran
    Hi, banging my head here and thought that some one out there might be able to help. Have Tables below. Bucket( bucketId smallint (PK) name varchar(50) ) BucketUser( UserId varchar(10) (PK) bucketId smallint (PK) ) The composite key is not the problem thats ok I know how to get around this but I want my bucket class to contanin a IList of BucketUser. I read the online reference and thought that I had cracked it but havent. The two mappings are below -- bucket -- <id name="BucketId" column="BucketId" type="Int16" unsaved-value="0"> <generator class="native"/> </id> <property column="BucketName" type="String" name="BucketName"/> <bag name="Users" table="BucketUser" inverse="true" generic="true" lazy="true"> <key> <column name="BucketId" sql-type="smallint"/> <column name="UserId" sql-type="varchar"/> </key> <one-to-many class="Bucket,Impact.Dice.Core" not-found="ignore"/> </bag> -- bucketUser --

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  • Create UserControl DependencyProperty of which value can be chosen in dropdown list (as combo box)

    - by Viet
    Hello everybody, I'm a starter at WPF, now i would like to make a WPF userControl library which include a Rating bar userControl. All the steps of creating the rating Bar has been done, however i would like to add a property RatingValue: public static readonly DependencyProperty RatingValueProperty = DependencyProperty.Register("RatingValue", typeof(int), typeof(RatingControl), new FrameworkPropertyMetadata(0, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(RatingValueChanged))); public int RatingValue { get { return (int)GetValue(RatingValueProperty); } set { SetValue(RatingValueProperty, value); } } private static void RatingValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { //... change the rating value } that the user of my UserControl can modify by a value from 0 to 5 that are shown in a dropdown list (combo box) in the Properties windows (as some exist properties of Usercontrols like Visibility, windows style, background ...) How can i do? Thank you very much in advance, Viet

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  • How to Redraw or Refresh a screen

    - by viky
    I am working on a wpf application. Here I need to use System.Windows.Forms.FolderBrowserDialog in my Wpf application. System.Windows.Forms.FolderBrowserDialog openFolderBrowser = new System.Windows.Forms.FolderBrowserDialog(); openFolderBrowser.Description = "Select Resource Path:"; openFolderBrowser.RootFolder = Environment.SpecialFolder.MyComputer; if (openFolderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.OK) { //some logic } when I select a Folder and click OK, I launch another System.Windows.Forms.FolderBrowserDialog with same code, My problem is when I select a Folder and click OK, the shadow of FolderBrowserDialog remains on the screen(means my screen doesn't refresh). I need to minimize or resize it in order to remove the shadow of FolderBrowserDialog. How can I solvet his issue? Any help plz?

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  • How reusable should ViewModel classes be?

    - by stiank81
    I'm working on a WPF application, and I'm structuring it using the MVVM pattern. Initially I had an idea that the ViewModels should be reusable, but now I'm not too sure anymore. Should I be able to reuse my ViewModels if I need similar functionality for a WinForms application? Silverlight doesn't support all things WPF does - should I be able to reuse for Silverlight applications? What if I want to make a Linux GUI for my application. Then I need the ViewModel to build in Mono - is this something I should strive for? And so on.. So; should one write ViewModel classes with one specific View in mind, or think of reusability?

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  • Delete image file used by XAML

    - by Frode Lillerud
    I'm trying to delete a Image file in WPF, but WPF locks the file. <Image Source="C:\person.gif" x:Name="PersonImage"> <Image.ContextMenu> <ContextMenu> <MenuItem Header="Delete..." x:Name="DeletePersonImageMenuItem" Click="DeletePersonImageMenuItem_Click"/> </ContextMenu> </Image.ContextMenu> </Image> And the Click handler just looks like this: private void DeletePersonImageMenuItem_Click(object sender, RoutedEventArgs e) { System.IO.File.Delete(@"C:\person.gif"); } But, when I try to delete the file it is locked and cannot be removed. Any tips on how to delete the file?

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  • Can I expose only a portion of one .NET DLL's public classes via a different "API" DLL?

    - by Ben McIntosh
    I am designing a WPF application that uses a DLL with maybe 40 public classes. I need these to be public for a variety of reasons including ease of data binding and obfuscation. I would like to allow other people to use only a portion of these classes as an API for my software. I thought I would create the main library (core.dll) and an API library (coreAPI.dll) with the API DLL to be referenced in a new project. Is there a way to allow coreAPI.dll to expose only a few of the classes that exist in core.dll? It's not so much a security issue as I primarily want to simply hide some of the unwanted classes from the Visual Studio Intellisense. Again, internal classes for the ones I want to hide is not really an option because I need to data bind some of these classes in WPF and for that, they must be public. Are there any other ways of doing this?

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  • Changing the colour of Aero glass for my window?

    - by Roger Lipscombe
    I'm using DwmExtendFrameIntoClientArea in my WPF application to get the glass effect. This is working fine. What I'd like to do is change the colour used for the glass -- I'm writing a countdown timer, and I'd like the window to be the normal glass colour most of the time, and then to go red (but still with glass) when the time runs out. I found this question, which talks about how to apply a gradient glass, and that works fine when picking a different colour. Unfortunately, the borders are not coloured appropriately. When I turn off the borders by using ResizeMode="NoResize", then I end up with square corners. I'd like to keep the rounded corners. I looked at creating an irregularly-shaped window, by using AllowTransparency="True" and that works fine, but doesn't look like an Aero glass window. It looks a bit flat. So: my question: how do I create a window in WPF that looks like Aero glass transparency, but uses a different colour?

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  • Should I inherit from a stackpanel instead of a stack panel, grid or other UI element or UserControl

    - by Joel Barsotti
    So I'm building a peice of UI that might me in a dialog window or might be in embedded in part of a bigger page. I don't have alot of experience with WPF, but in ASP.NET you always used UserControls, because their wasn't anyt really generic UI inherit to inherit from (and in a way UserControl was just a div). My coworker has written alot of controls that inherit directly from stackpanel. That seems like a decent way of doing things. But when I went to create a control for the code I was going to write I was presented with a dialog that only included the UserControl, which I wasn't that familiar with in the context of WPF. So can someone explain to me the difference from building a control that inherits from user control vs inheriting directly from a stackPanel?

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  • What is the significance of ProjectTypeGuids tag in the visual studio project file

    - by sudarsanyes
    What is the significance of the ProjectTypeGuids tag in a visual studio project?? When I created a WPF application, i am seeing two guids in here. {60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} Does these represent WPF and Windows type of applications? If I create my own project type (.myproj) that has .xaml and .cs files, what should I fill in this ProjectTypeGuids tags? Should I also need to fill the ProjectType tag? It would also be better if someone differentiate the ProjectType and ProjectTypeGuids tags. P.S. I am using Visual Studio 2010 RC currently Thanks

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  • Window Size when SizeToContent is not specified

    - by moogs
    When the following XAML used, the window size is not 5000x5000, but some small window where the button is cropped. <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" > <Button Width="5000" Height="5000">XXX</Button> </Window> From what I can tell, size I did not specify the SizeToContent attribute, the default is "Manual", so it will use *size of a window is determined by other properties, including Width, Height, MaxWidth, MaxHeight, MinWidth, and MinHeight. * From the WPF Windows Overview, it seems those other properties are FrameworkElement::MinHeight/Width, and FrameworkElement::MaxHeight. But since the default for the Mins are 0, the Maxs are Infinity and the Width/Height is Nan....what's going on? Where is WPF getting the window size? Any pointers to the right direction would be appreciated.

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  • Create popup "toaster" notifications in Windows with .NET

    - by Draak
    I am using .NET and am creating a desktop app/service that will display notifications in the corner of my Desktop when certain events are triggered. I don't want to use a regular Message Box b/c that would be too intrusive. I want notifications to slide into view and then fade out after a few seconds. I am thinking of something that will act very much like the Outlook alerts that one gets when a new message arrives. The question is: Should I use WPF for this? I've never done anything with WPF but will happily try it if that's best means to the end. Is there a way to accomplish this with regular .NET libraries?

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  • Is there a path of least resistance that a newcomer to graphics-technology-adoption can take at this point in the .NET graphics world?

    - by Rao
    For the past 5 months or so, I've spent time learning C# using Andrew Troelsen's book and getting familiar with stuff in the .NET 4 stack... bits of ADO.NET, EF4 and a pinch of WCF to taste. I'm really interested in graphics development (not for games though), which is why I chose to go the .NET route when I decided choose from either Java or .NET to learn... since I heard about WPF and saw some sexy screenshots and all. I'm even almost done with the 4 WPF chapters in Troelsen's book. Now, all of a sudden I saw some post on a forum about how "WPF was dead" in the face of something called Silverlight. I searched more and saw all the confusion going on at present... even stuff like "Silverlight is dead too!" wrt HTML5. From what I gather, we are in a delicate period of time that will eventually decide which technology will stabilize, right? Even so, as someone new moving into UI & graphics development via .NET, I wish I could get some guidance from people more experienced people. Maybe I'm reading too much? Maybe I have missed some pieces of information? Maybe a path exists that minimizes tears of blood? In any case, here is a sample vomiting of my thoughts on which I'd appreciate some clarification or assurance or spanking: My present interest lies in desktop development. But on graduating from college, I wish to market myself as a .NET developer. The industry seems to be drooling for web stuff. Can Silverlight do both equally well? (I see on searches that SL works "out of browser"). I have two fair-sized hobby projects planned that will have hawt UIs with lots of drag n drop, sliding animations etc. These are intended to be desktop apps that will use reflection, database stuff using EF4, networking over LAN, reading-writing of files... does this affect which graphics technology can be used? At some laaaater point, if I become interested in doing a bit of 3D stuff in .NET, will that affect which technologies can be used? Or what if I look up to the heavens, stick out my middle finger, and do something crazy like go learn HTML5 even though my knowledge of it can be encapsulated in 2 sentences? Sorry I seem confused so much, I just want to know if there's a path of least resistance that a newcomer to graphics-technology-adoption can take at this point in the graphics world.

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  • Using file-path to images stored within the Application Settings

    - by Bill
    I am trying to develop an application that uses a number of images that are stored in a seperate remote file location. The file-paths to the UI elements are stored within the Application Settings. Although I understand how to access and use the file-path from Settings in C# (Properties.Settings.Default.pathToGridImages + "OK.png"), I am at a loss to figure out how to utilize the Settings paths in WPF, and can only seem to access the file if I include the file-path, such as: <Grid.Background> <ImageBrush ImageSource="C:\Skins\bottomfill.png" TileMode="Tile" /> </Grid.Background> I would have thought that concatenating "Properties.Settings.Default.pathToGridImages" with "bottomfill.png" in WPF could be done much like it can be done in C#. Can anyone please point me in the right direction?

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  • StockTrader RI > Controllers, Presenters, WTF?

    - by SandRock
    I am currently learning how to make advanced usage of WPF via the Prism (Composite WPF) project. I watch many videos and examples and the demo application StockTraderRI makes me ask this question: What is the exact role of each of the following part? SomethingService: Ok, this is something to manage data SomethingView: Ok, this is what's displayed SomethingPresentationModel: Ok, this contains data and commands for the view to bind to (equivalent to a ViewModel). SomethingPresenter: I don't really understand it's usage SomethingController: Don't understand too I saw that a Presenter and a Controller are not necessary but I would like to understand why they are here. Can someone tell me their role and when to use them?

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  • How to do the processing and keep GUI refreshed using databinding?

    - by macias
    History of the problem This is continuation of my previous question How to start a thread to keep GUI refreshed? but since Jon shed new light on the problem, I would have to completely rewrite original question, which would make that topic unreadable. So, new, very specific question. The problem Two pieces: CPU hungry heavy-weight processing as a library (back-end) WPF GUI with databinding which serves as monitor for the processing (front-end) Current situation -- library sends so many notifications about data changes that despite it works within its own thread it completely jams WPF data binding mechanism, and in result not only monitoring the data does not work (it is not refreshed) but entire GUI is frozen while processing the data. The aim -- well-designed, polished way to keep GUI up to date -- I am not saying it should display the data immediately (it can skip some changes even), but it cannot freeze while doing computation. Example This is simplified example, but it shows the problem. XAML part: <StackPanel Orientation="Vertical"> <Button Click="Button_Click">Start</Button> <TextBlock Text="{Binding Path=Counter}"/> </StackPanel> C# part (please NOTE this is one piece code, but there are two sections of it): public partial class MainWindow : Window,INotifyPropertyChanged { // GUI part public MainWindow() { InitializeComponent(); DataContext = this; } private void Button_Click(object sender, RoutedEventArgs e) { var thread = new Thread(doProcessing); thread.IsBackground = true; thread.Start(); } // this is non-GUI part -- do not mess with GUI here public event PropertyChangedEventHandler PropertyChanged; public void OnPropertyChanged(string property_name) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(property_name)); } long counter; public long Counter { get { return counter; } set { if (counter != value) { counter = value; OnPropertyChanged("Counter"); } } } void doProcessing() { var tmp = 10000.0; for (Counter = 0; Counter < 10000000; ++Counter) { if (Counter % 2 == 0) tmp = Math.Sqrt(tmp); else tmp = Math.Pow(tmp, 2.0); } } } Known workarounds (Please do not repost them as answers) Those two first are based on Jon ideas: pass GUI dispatcher to library and use it for sending notifications -- why it is ugly? because it could be no GUI at all give up with data binding COMPLETELY (one widget with databinding is enough for jamming), and instead check from time to time data and update the GUI manually -- well, I didn't learn WPF just to give up with it now ;-) and this is mine, it is ugly, but simplicity of it kills -- before sending notification freeze a thread -- Thread.Sleep(1) -- to let the potential receiver "breathe" -- it works, it is minimalistic, it is ugly though, and it ALWAYS slows down computation even if no GUI is there So... I am all ears for real solutions, not some tricks.

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  • Using a Button to navigate to another Page in a NavigationWindow

    - by Will
    I'm trying to use the navigation command framework in WPF to navigate between Pages within a WPF application (desktop; not XBAP or Silverlight). I believe I have everything configured correctly, yet its not working. I build and run without errors, I'm not getting any binding errors in the Output window, but my navigation button is disabled. Here's the app.xaml for a sample app: <Application x:Class="Navigation.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" StartupUri="First.xaml"> </Application> Note the StartupUri points to First.xaml. First.xaml is a Page. WPF automatically hosts my page in a NavigationWindow. Here's First.xaml: <Page x:Class="Navigation.First" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="First"> <Grid> <Button CommandParameter="/Second.xaml" CommandTarget="{Binding RelativeSource= {RelativeSource FindAncestor, AncestorType={x:Type NavigationWindow}}}" Command="NavigationCommands.GoToPage" Content="Go!"/> </Grid> </Page> The button's CommandTarget is set to the NavigationWindow. The command is GoToPage, and the page is /Second.xaml. I've tried setting the CommandTarget to the containing Page, the CommandParameter to "Second.xaml" (First.xaml and Second.xaml are both in the root of the solution), and I've tried leaving the CommandTarget empty. I've also tried setting the Path to the Binding to various navigational-related public properties on the NavigationWindow. Nothing has worked so far. What am I missing here? I really don't want to do my navigation in code. Clarification. If, instead of using a button, I use a Hyperlink: <Grid> <TextBlock> <Hyperlink NavigateUri="Second.xaml">Go! </Hyperlink> </TextBlock> </Grid> everything works as expected. However, my UI requirements means that using a Hyperlink is right out. I need a big fatty button for people to press. That's why I want to use the button to navigate. I just want to know how I can get the Button to provide the same ability that the Hyperlink does in this case.

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  • Create slide-in notifications à la Outlook in Windows with .NET

    - by Draak
    I am using .NET and am creating a desktop app/service that will display notifications in the corner of my Desktop when certain events are triggered. I don't want to use a regular Message Box b/c that would be too intrusive. The notifications would slide into view and then fade out after a few seconds. I am thinking of something that will act very much like the Outlook alerts that one gets when a new message arrives. The question is: Should I use WPF for this? I've never done anything with WPF but will happily try it if that's best means to the end. Is there a way to accomplish this with regular .NET libraries?

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  • Using image resource in XAML markup?

    - by Jeff Dahmer
    I'm trying to add little icons to my tabs in WPF but having trouble with how to set up the binding. <TabItem.Header> <StackPanel Orientation="Horizontal"> <Image Source="{Binding Source=prop:Resources.eye}" /> <Label VerticalAlignment="Center">Header</Label> </StackPanel> </TabItem.Header> The xmlns:prop is set up for the local project's Properties, I am pulling other values from it elsewhere so I know that the namespace works. The markup above compiles fine BUT I don't see the eye image in the tab. Also, is there any way to set this up into a template? I'm fairly new to XAML/WPF and each tab will have its own image...

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