Why is there a performance difference when my application becomes activated?
I am working on a WPF application that displays a grid of many images with scrolling/expanding animations that display a video when the user hovers the image. When this application is run on an Intel CPU + NVidia GPU machine, the animations and video…
WPF - Change cell colour when operation is successfull
Hello! I have this datagrid: The last column has buttons ("+") that when pressed open the following window: In this window when the "Registar" button is pressed the app executes an operationa and returns to the…
How to start WPF in separate thread and still updating it continuously
Hi. C#, .Net 3.1, WPF I want to have a WPF window that takes data from a BlockingCollection<ColorAddress>(ConcurrentQueue<ColorAddress>) continuously. I have managed to start the window in it's own thread, but while doing this with the…
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Are there namespaces and XAML components unique to Silverlight?
I have inherited a legacy application and need to know if it is using Silverlight. Apart from uninstalling Silverlight, is there any way to look at the code and determine if it is a Silverlight application? If it is a Silverlight application, I need…
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WPF: rotate a Model3D about the Viewport3D center
I have a WPF app where different Model3Ds are arranged in a Model3DGroup and displayed in a Viewport3D. I may pan, zoom in / out the displayed models. Everything is handled programmatically in the .Net app. The only Xaml code is to define a UserControl…
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How can I access resources from external assembly?
I don't seem to be able to access remote resources from an external assembly. The following line in MainWindow.xaml isn't working, no background color is getting displayed: <StackPanel Grid.Row="0" Background="{DynamicResource…
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Question about performance in Wpf
Hi, I have a general question about the right way to bind a class to a listview or list box or any other control in wpf. Lets say that I have a textbox which the width is binded with the property of my class "my width" <Textbox…
WPF Listview
Hi, I have a WPF ListView, the objects of which are bound to a view model and I use a CollectionViewSource to group them based on their properties - the CollectionViewSource dynamically creates expanders and groups the items in the ListView - this…
WPF ListView change arrow icon
Hi, I've created an app in Visual Studio in C# using a WPF page - all works fine. The app displays a list view which has several sub lists (looks very similar to an Expander), I don't like the large arrow in circle icon and would like to change it to…
How to store and retrieve image using MVVM pattern in WPF C#
Please I am looking for a solid means to save and retrieve image to/fro SQL server database. I am using MVVM pattern in WPF. I have gone through everything I saw on Google concerning this issue, all I'm seeing is Image control being tied directly to code…
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INotifyDataErrorInfo implementation for several values, check that there are no errors in Dictionary (WPF MVVM)
I have been trying to implement INotifyDataErrorInfo and everything seems to be working except SaveSettings() and especially bool HasErrors. Can somebody please tell me why and how to fix it? I mean that SaveSettings is always triggered, even if there…
How can I bind text and have it format itself on the UI?
Hi. How can I bind text and have it format itself on the UI? For example, suppose the string in the ViewModel is this: myDependencyProperty = @"<b>Title: </b>My title\n<b>Description: </b>This is my…
Azure work well with the new ghostly app?
Does the new ghostly app work well with Azure? And if so what's the best platform to integration with?
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Accessing property from multiple Classes (MVVM WPF application)
I have been trying to learn C# by creating a small app. Recently I have been trying to implement SessionEvent for screen lock/unlock to pause the timer. I am having a problem understanding how to access timer from App.xaml.cs. Currently while locking the…
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How to make a Home-button in UserControl switch a page in MainWindow frame without using mvvm?
Hi there! I am new in wpf and c#. I have now used 2 days on searching the web without any solutions I could implement in a satisfying way. Either I can't make the solutions work or it's the annoying MVVM pattern. At my current learning step it's just…
WPF rendering a Viewport3D to RenterTargetBitmap changes RGB values
I'm trying to render a Viewport3D with textured triangles to a RenderTargerBitmap. But the colors in the bitmap are different than in the viewport: Right side: an actual in-app Viewport3D. Left side: the RenderTargetBitmap shown in a…
WPF MVVM how to show data from many tables in one view
Hi, I think this is very common scenario when you have relational database and classes witch represent each table as class (as is model) public class Role : AppEntityBase { public int RoleId { get; set; } public string…
WPF MVVM relational database with foreign keys sample
Hi what is the best practice to work with foreign keys? How to design object class? Should I use valueConverter to switch between RoleId to RoleName
Access IValueConverter From ResourceDictionary
I have Canvas that is icon: Dictionary1.xaml: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" …
Accessing string in ViewModel from IValueConverter
I am trying to create a converter that will take string property from ViewModel, compare it to time passed (time is inputted to TextBox HoursLimitProp in a format 07:30) and then change Label color accordingly. I know this is bad idea to do this way…