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  • How can I bind a instance of a custom class to a WPF TreeListView without bugs?

    - by user327104
    First, from : http://blogs.msdn.com/atc_avalon_team/archive/2006/03/01/541206.aspx I get a nice TreeListView. I left the original classes (TreeListView, TreeListItemView, and LevelToIndentConverter) intact, the only code y have Added is on the XAML, here is it: <Style TargetType="{x:Type l:TreeListViewItem}"> .... </ControlTemplate.Triggers> <ControlTemplate.Resources> <HierarchicalDataTemplate DataType="{x:Type local:FileInfo}" ItemsSource="{Binding Childs}"> </HierarchicalDataTemplate> </ControlTemplate.Resources> </ControlTemplate> ... here is my custom class public class FileInfo { private List<FileInfo> childs; public FileInfo() { childs = new List<FileInfo>(); } public bool IsExpanded { get; set; } public bool IsSelected { get; set; } public List<FileInfo> Childs { get { return childs; } set { } } public string FileName { get; set; } public string Size { get; set; } } And before I use my custom class I remove all the items inside the treeListView1: <l:TreeListView> <l:TreeListView.Columns> <GridViewColumn Header="Name" CellTemplate="{StaticResource CellTemplate_Name}" /> <GridViewColumn Header="IsAbstract" DisplayMemberBinding="{Binding IsAbstract}" Width="60" /> <GridViewColumn Header="Namespace" DisplayMemberBinding="{Binding Namespace}" /> </l:TreeListView.Columns> </l:TreeListView> So finaly I add this code to bind a Instance of my class to the TreeListView: private void Window_Loaded(object sender,RoutedEventArgs e) { FileInfo root = new FileInfo() { FileName = "mis hojos", Size="asdf" }; root.Childs.Add(new FileInfo(){FileName="sub", Size="123456" }); treeListView1.Items.Add(root); root.Childs[0].Childs.Add(new FileInfo() { FileName = "asdf" }); root.Childs[0].IsExpanded = true; } So the bug is that the button to expand the elementes dont appear and when a node is expanded by doble click the child nodes dont look like child nodes. Please F1 F1 F1 F1 F1 F1 F1 F1.

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  • How do I work with WIndows Forms in WPF?

    - by xarzu
    How do I work with WIndows Forms in WPF? In my WPF program I created a Windows Form class. In this Form, I placed an OK button and I went into the properties of the button and set the DialogResult to OK. Now, I am calling this Dialog (Window Form) from the MainWindow.xaml.cs: dres = form.ShowDialog(); if (dres != DialogResult.OK) return; The compiler is complaining: Error 3 'System.Nullable<bool>' does not contain a definition for 'OK' and no extension method 'OK' accepting a first argument of type 'System.Nullable<bool>' could be found (are you missing a using directive or an assembly reference?)

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  • Differences between WPF Custom Control Library and plain Class Library?

    - by David Veeneman
    I posted a question a few months ago about sharing resource dictionaries across assemblies. It turns out you can do that using the Component Resource Key markup extension. At the time, I could only get it working with a WPF Custom Control project, not with a plain Class Library project. Now I need to use an existing plain Class Library project to host a shared resource dictionary. That means I need to retrofit the Class Library project to support the Component Resource Key markup extension. I have added a Themes folder and a Generic.xaml resource dictionary document to the Class Library project, as well as references to PresentationCore, PresentationFramework, and WindowsBase. Unfortunately, that doesn't seem to do the trick. So, here is my question: Other than the above, what does a WPF Custom Control Library project have that a plain Class Library project doesn't? Or, to put it another way, what else could I add to my class library project to get this feature working? Thanks.

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  • How can I get to the value of my WPF UserControl DependencyProperty from UI Automation Framework?

    - by Surfbutler
    Hi, I'm having trouble getting access to my WPF UserControl DependencyProperty values through the UI Automation Framework. I've used James McCaffreys article in MSDN as a starting point (Automating IO Tests in WPF Applications, MSDN March 2009), but I can only see properties etc in standard controls such as buttons. I'm assuming there's some Automation interface I have to implement on my UserControl, but what and how? I can already see my control fine e.g. in UISpy, but I can't see the dependency properties within it. Here's what my usercontrol looks like currently in UISpy: AutomationElement General Accessibility AccessKey: "" AcceleratorKey: "" IsKeyboardFocusable: "False" LabeledBy: "(null)" HelpText: "Switches 48v Phantom Power On/Off (for Mic inputs only)." State IsEnabled: "True" HasKeyboardFocus: "False" Identification ClassName: "" ControlType: "ControlType.Custom" Culture: "(null)" AutomationId: "V48SwL" LocalizedControlType: "custom" Name: "" ProcessId: "5684 (VirtualSix)" RuntimeId: "7 5684 40026340" IsPassword: "False" IsControlElement: "True" IsContentElement: "True" Visibility BoundingRectangle: "(140, 457, 31, 20)" ClickablePoint: "155,467" IsOffscreen: "False" ControlPatterns

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  • Why the same code in WPF is slower than in Windows Forms?

    - by Marco Bettiolo
    I made bunch of benchmarks of the framework 4.0 and older and I can't understand why the same code is slower when using WPF compared to Windows Forms: This is the code, it has nothing to do with the UI elements: Random rnd = new Random(845038); Int64 number = 0; for (int i = 0; i < 500000000; i++) { number += rnd.Next(); } The code takes 5968ms - 6024ms to execute in Windows Forms and 6953ms in WPF. Here is the post with the downloadable solution: http://blog.bettiolo.it/2010/04/benchmark-of-net-framework-40.html

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  • Where should I put WPF specific code when using MVVM?

    - by Surfbutler
    I'm just getting up to speed on MVVM, but all the examples I've seen so far are binding View controls to simple non-WPF specific data types such as strings and ints. However in our app I want to be able to set a button's border brush based on a number in the Model. At the moment, I translate the number into a brush in the ViewModel to keep the View XAML only, but is that right? I don't like putting WPF specific code in the ViewModel, but equally I don't like the idea of putting code-behind on my View panel. Which is the best way? Thanks

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  • Could not see memory being released on closing MFC modal dialog that hosts wpf user control using HW

    - by Naveen Chiluka
    This is in continuation with my last question posted "Continuous Memory leak while using WpfHWndSource" I have to load an WPF User Control in an MFC Modal Dialog that is being invoked from the ocx control. For this I have created a MFC Regular Dll(Mixed Mode Regular dll with clr option enabled), I have created a modal dialog which will host wpf user control using HWndSource. This exported dialog is placed as a child Dialog of the above MFC dialog that is being invoked from the ocx. Ny intermediate dialog uses C++/Cli code. When the main MFC dialog is closed, I am deleteing the ptr reference of the intermediate dialog created on the heap. In the the dipose of the .Net User Control, I have set most of the references that I have created to null, unsubscribed to the events (to avoid weak refernces), unbinded from the propertes(by using clear binding). Called delete on the HwndSource and the user control(which basically calls the dispose method). But I do not see complete memory being released. Any help would be greatful.

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  • Possible to InvalidateVisual() on a given region instead of entire WPF control?

    - by Scott Bilas
    I have a complex WPF control that draws a lot of primitives in its OnRender (it's sort of like a map). When a small portion of it changes, I'd only like to re-issue render commands for the affected elements, instead of running the entire OnRender over. While I'm fine with my OnRender function's performance on a resize or whatever, it's not fast enough for mouse hover-based highlighting of primitives. Currently the only way I know how to force a screen update is to call InvalidateVisual(). No way to send in a dirty rect region to invalidate. Is the lowest granularity of WPF screen composition the UI element? Will I need to do my renders of primitives into an intermediate target and then have that use InvalidateVisual() to update to the screen?

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  • How to get or make a WPF WebBrowser with a visual.

    - by Trainee4Life
    Having problems related to WPF WebBrowser not having a visual. Reason being, that it actually a wrapper around the winforms browser. Anyways, I searched the web for any solution to this problem, and got hold of the following suggestions: http://chriscavanagh.wordpress.com/2009/08/25/a-real-wpf-webbrowser/ http://rob.runtothehills.org/archives/60 The first one solves everything, but seems like an overkill. Plus, the dll's should be licensed for commercial use. The second one seems simple, but not able to figure out when to refresh the screen. Plus there's so much to do like sending mouse and keyboard messages to the webbrowser. P.S. The problem I'm trying to solve is to show the same webbrowser on different windows. They both must be interactive, and always in sync visually.

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  • Is there simple way to play an rtp video/audio stream in WPF?

    - by Robin
    I need to create a WPF control that will play an rtp stream with the requirement that the latency needs to be as low as possible. I've looked at the following two projects: http://vlcdotnet.codeplex.com/ http://wpfmediakit.codeplex.com/ As far as I know, I can't use VLC because we're shipping a commercial application with a more restrictive license than GPL (i.e. we can't ship our source). Wpf media kit is nice, but I can't seem to find a good/free rtp directshow source filter and I wanted to ask if there is a simpler solution out there that I'm missing before I jump into writing my own. Any ideas?

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  • POS Desktop Application using DB or Localfiles ? using WPF

    - by Panindra
    I am planning to build a POS Application for my shop. I have enough knowledge to build the application using DB and also using local files( system.IO - binary files ) to store and access the data for my application. But , i have no deployment experience and confused in choosing data storing option. Database using MDF may be good option ( may ease plenty of coding ) but i don't want to have SQL server on my desktop. as i am using WPF for building , my concern is that my application may get slow due to server response and design rendering of WPF. Then i tried to use only local data (binary files) to store the data and retrive using class and objects. but this coding is taking lot of time , so in the middle of the process i struck in the dilemma of going back to Database . Please help , for performance wise whic one is better . and in Practical World ,in professional applications which one is widely using .. please give suggestions ..

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  • WPF custom user widgets. Will UI components be standardized?

    - by Andrew Florko
    There are lots of articles and video lessons that describe how to create your unique user widget (graphical control) with WPF. There are tons of technical details what is behind the scene and I feel people enthusiasm with ability to customize widgets as never before. I remember those days when VCL library (Delphi) appeared and there was the same enthusiasm in VCL widgets area. Ability to create VCL controls was nearly the must when you was applying for a job as Delphi developer. This situation continued for several years till professional sophisticated 3'd party UI libraries appeared. Hardly you'll have to create your own VCL widget nowadays. Will WPF widgets enthusiasm die as VCL one?

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  • Using GetLineStartPosition to get the end of a line in WPF RichTextBox.

    - by Alan Spark
    A bit of background. I would like to be able to process text for the line that the caret is on in a WPF RichTextBox. Please see my earlier question about the TextPointer class: http://stackoverflow.com/questions/3046162/how-to-keep-track-of-textpointer-in-wpf-richtextbox. I know how to get the TextPointer at the start of the current line by using GetLineStartPosition with 0 as the argument but would now like to get the TextPointer at the end of the line. It was suggested in my previous question that this is possible using the GetLineStartPosition method. I would appreciate it if someone can explain a bit about how the GetLineStartPosition works with regard to end of line pointers. Thanks in advance for any help.

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  • WPF & RenderTierCapability, what could cause a machine to be dropped from Tier 2 to 0?

    - by Erode
    I'm having an issue on some imaged machines where they will started out on Tier 2 and after some time of use (they are well spec'd kiosk machines, quad-core, Nvidia 550Ti), they drop to Tier 0 and effectively become useless. Restarting the machine doesn't seem to help. This is a problem more than just "missing hardware acceleration" because my application requires D3DImage to function (which requires Tier 2). Thanks for any help!

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  • is it possible to write data to a collection in wpf?

    - by randyc
    Hello. In looking through samples I have seen a number of examples where it is possible to present data within a wpf applicaiton by binding to collections. However I was wondering is it possible to write to a collection from an applicaiton. Say for example i have 2 or more fields such as names and I wanted to have hte ability to add up to three names in my application ( all stored in memory). Will collections serve this purpose. In the past with asp.net I have done this by creating data tables and storing values on the fly or during the session. I am trying to learn WPF and I was wondering if collections work in the same fashion? If so could you please post an example or point me to references that show examples of this? Thank you in advance.

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  • How to bind WPF TreeView to a List<Drink> programmatically?

    - by Joan Venge
    So I am very new to WPF and trying to bind or assign a list of Drink values to a wpf treeview, but don't know how to do that, and find it really hard to find anything online that just shows stuff without using xaml. struct Drink { public string Name { get; private set; } public int Popularity { get; private set; } public Drink ( string name, int popularity ) : this ( ) { this.Name = name; this.Popularity = popularity; } } List<Drink> coldDrinks = new List<Drink> ( ){ new Drink ( "Water", 1 ), new Drink ( "Fanta", 2 ), new Drink ( "Sprite", 3 ), new Drink ( "Coke", 4 ), new Drink ( "Milk", 5 ) }; } } How can I do this in code? For example: treeview1.DataItems = coldDrinks; and everything shows up in the treeview.

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  • How can I create a profiler GUI in WPF?

    - by thehan
    I am looking to create a task profiler in WPF with an UI similar to the one of incredibuild. Eg, timed tasks appear as strips on their respective line. Have a look at: http://baoz.net/wp-content/2009/06/ib1.png to see what I mean. I am unsure what the best way to tackle this problem is? Should I override the Panel class creating a custom layout panel for this or might there be an existing control/library out there that can fit my needs. I have so far had a look at various charting controls but am unsure of weither they can be tweaked to achieve this behaviour or not. I am really hoping for someone who has been using WPF for a while to help me narrow down my search. It is not exactly easy to know what to google for either :)

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