uwp

问题 I'm dealing with a third-party API who's calls require the Content-Type header on GET method requests, but return an error response when the header collection includes "Content-Length". The only way to add the Content-Type header is to add a class that inherits/implements the IHttpContent interface (I was using HttpStringContent with string.empty as the string content). The problem, is that adding a blank HttpStringContent adds ContentLength. Even though the value of that header is '0', their

问题 This question already has answers here : FromBluetoothAddressAsync IAsyncOperation does not contain a definition for 'GetAwaiter' error (2 answers) Closed last year . I am using Visual Studio 2017 Professional. I have been following this guide: https://docs.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/notification-listener My problem code is as follows: using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System

问题 With a TreeView I have a Patient structure: private ObservableCollection<MTreeViewPaz> _Patients; public ObservableCollection<MTreeViewPaz> Patients { get { return _Patients; } private set { Set(ref _Patients, value); } } and a treeView bound to it: <winui:TreeView x:Name="treeView" Grid.Row="1" Expanding="treeView_Expanding" ItemInvoked="OnItemInvoked" ItemTemplate="{StaticResource ItemTemplate}" ItemsSource="{x:Bind Patients, Mode=OneWay}" SelectionMode="Single" /> with Item Template:

问题 I just want to log to console and to a log file, using a standard TraceSource, in my Xamarin app that will run on UWP, Mac OS X, iOS and Android. I'm developing/debugging on UWP. TraceSource, TraceListener, and TextWriterTraceListener are indeed all available in .Net Standard library, so perhaps I'm setting it up incorrectly? Most places on the Internet insist on setting up trace listeners in an app.config file, but this is not applicable nor possible for Xamarin apps. So here is my logging

问题 Pivot Control Black Box The goal is to change the color of the black border around my Pivot control. I created a copy of the template for the pivot control so I can modify the style. It isn't obvious how to modify the style to change the color of the this black brush. Added Border Brush - I looked at BorderBrush but it doesn't really feel like change? Where and how - to best achieve the changing of a border color? The red dotted boxes are not changing the color. 回答1: The black border in your

问题 Thanks to the help I was able to have 2 glyps in an AppBar Button. I would like to make the second one smaller (half of the first one) and be overlapping in the bottom left corner... but I do not want to use absolute numbers to keep the UI responsive <AppBarToggleButton Label="" > <AppBarToggleButton.Content> <Grid> <FontIcon FontFamily="Segoe MDL2 Assets" Glyph="" /> <FontIcon FontFamily="Segoe MDL2 Assets" Glyph="" /> </Grid> </AppBarToggleButton.Content> </AppBarToggleButton> How can I

问题 I have a major performance issue on a TreeView both in terms of loading time as well as a deadlock of the UI. private async Task LoadTreeAsync() { List<VPazVisit> aList = new List<VPazVisit>(); if (_sorting == "") { _sorting = await ApplicationData.Current.LocalSettings.ReadAsync<string>("TreeViewSort"); } treeView.Visibility = Visibility.Collapsed; Patients.Clear(); switch (_sorting) { default: case "DescDate": aList = await Task.Run(() => App.gDataContext.Cache.VPazVisit .OrderByDescending

问题 I've been able to set focus on my view's Close button using the following code in the MainPage.xaml.cs OnNavigatedTo() event handler. this.close.Focus(FocusState.Programmatic);` // or Windows.UI.Xaml.Input.FocusManager.TryFocusAsync(this.Close, FocusState.Programmatic);` I'd prefer a way to declaratively set this in the xaml markup. Is there a way to do that? I've tried following samples provided in SO post hits on this subject showing approaches llike the following using FocussedElement,

问题 I tried to implement Master-Details view from UWP Community Toolkit 2.0. I copied the example code from the uwp community toolkit sample app. But It seems the data is not binding properly. Now the Master details View is empty. Can anyone help me where I went wrong? XAMl CODE:` <Page x:Class="FaceIdentification.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:FaceIdentification" xmlns:d="http:/

问题 I tried to implement Master-Details view from UWP Community Toolkit 2.0. I copied the example code from the uwp community toolkit sample app. But It seems the data is not binding properly. Now the Master details View is empty. Can anyone help me where I went wrong? XAMl CODE:` <Page x:Class="FaceIdentification.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:FaceIdentification" xmlns:d="http:/