uwp

问题 I want to horizontally stretch a ListView in UWP 10. I also set the HorizontalContentAlignment to Stretch . It kinda works, but its not exactly the result i wanted. I set the ListView background to Aqua so, you could see, that the ListView itself is strechting to 100%. The content is also strechting, but I got this space on the left and on the right. So my question is: How can i remove those "margins" left and right? Here is the result: And here is the XAML: <Grid Background="{ThemeResource

问题 I'm running into a snag utilizing the StreamReader class. On the StreamReader Class documentation page, it states that it supports Universal Windows Platforms (UWPs) under the Version Information header, "Universal Windows Platform - Available since 8". Upon further inspection of its constructors, the StreamReader(Stream) constructors do support UWP apps, however the StreamReader(String) constructors do not support them. I'm currently using the StreamReader(String) constructor with the

问题 TransformMatrix documentation says "This property can be animated. Call CompositionObject.StartAnimation to associate it with a CompositionAnimation." But I can't create a CompositionAnimation that can target it. I tried CreateQuaternionKeyframeAnimation and I tried CreateVector4KeyframeAnimation: Visual visual = ElementCompositionPreview.GetElementVisual(myUIElement); var animation = visual.Compositor.CreateVector4KeyFrameAnimation(); Vector4 v4 = Vector4.Transform(new Vector4(), myMatrix4x4

问题 I have a class FormItem which implements an IDictionary<string, object> , when I bind the Value property of the FormItem , the PropertyChanged event is always null, but when I remove the IDictionary from FormItem then the FormItem.PropertyChanged event is not null. I want to know why it is null when I am implementing IDictionary and how it can be fixed. Example public class FormItem : INotifyPropertyChanged, IDictionary<string, object> { public int _value; public int Value { get { return

问题 I'm trying to repackage an existing desktop app for Windows 10 IoT on ARM (Dragonboard 410c,specifically). I've installed VS 2017 Community edition (15.9.6) and I have the source for the desktop version of this project, although I don't know much about it. It currently targets x86 / x64 (both of which work fine), but an ARM option is not available. Do I need to add some component to VS, or manually edit something to be able to compile for ARM? When I set the Dragonboard as the Remote Target,

问题 I tried two different approaches to connect to Bluetooth device in windows 10. 1)Developed an application with 32feetnet and tried to connect to Bluetooth device, it is prompting with whether pin is matched or not message box. 2. Created a sample Universal Windows program(UWP) to connect to Bluetooth device, it is prompting with whether pin is matched or not message box. Is there any away to avoid the pin prompting message box. 回答1: EventHandler authHandler = new EventHandler

问题 I'm trying to understand how the trial licensing works for my Win32 app that I converted to a UWP app using the Desktop Bridge. The app was submitted to the Windows Store as a paid app ($1.99 per copy) with a 1 day trial. So I downloaded it as a trial app onto my test Windows 10 machine and let it run for longer than 24 hrs w/o buying it. After a day the app was still present on the computer (in the Start menu) but when I tried to run it again by clicking its Start menu icon, I was greeted by

问题 I'm using RadialGradientBrush as background for a Button. On one computer, it works well. On the other, the background is transparent. NewComputer: Intel i7-8700, 16Gb ram, 64-bit OS, graphics - Nvidia GeForce GTx1050Ti OldComputer: Intel 6300, 2Gb ram, 32-bit OS, graphics - Intel G965 Express Chipset Family Both computers are running Windows 10 Home, 1809 (17763.503), 1920x1080 monitor. Running the same program on each computer (shown below), I do not get the RadialGradientBrush to show up

问题 In my app both the app and a background task access a file and whichever opens the file first, the other one will fail. to avoid that happening, I want to stop the background task when the user opens the app, and don't run the background if the app is already open. How to know from background task if app is running or not? and how to stop it before app starts? thanks. This is how I register the background task: var result = await BackgroundExecutionManager.RequestAccessAsync(); var builder =

问题 Suppose my app has one button that adds another button. If I press it, another button should appear right next to the first button. Also, the new button should become the "add a new button"-button. How do I do this? My approach was creating a RelativePanel, because in the Editor, you can say "Place this left of that". However, it can't find a way to do that in C# code. 回答1: You can follow ctron's comment and do it via setting attached property value in the code. The sample can look like this