uwp

问题 Here's a fragment of a UWP app I am writing // [...] using Windows.Devices.Enumeration; using Windows.Devices.SerialCommunication; using Windows.Networking.Connectivity; // [...] private Dictionary<string, SerialDevice> _SerialDevices = new Dictionary<string, SerialDevice>(); // [...] var serialSelector = SerialDevice.GetDeviceSelector(); var serialDevices = (await DeviceInformation.FindAllAsync(serialSelector)).ToList(); var hostNames = NetworkInformation.GetHostNames().Select(hostName =>

问题 Here's my prblem using (var db = new CassaContext()) { var DbSet = db.GetByName(item.Name); DbSet.RemoveRange(DbSet); for (var i = 0; i < data.Count; i++) { JObject jitem = data[i] as JObject; var dbobj = vm.Db.JsonToObject(jitem); DbSet.Add(dbobj); } db.SaveChanges(); } If i will add db.SaveChanges() after the RemoveRange() istruction, everything is fine, but, without that, i have the error The instance of entity type 'Users' cannot be tracked because another instance of this type with the

问题 I created List like this: using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading.Tasks; using WooCommerceNET; using WooCommerceNET.WooCommerce; namespace xBindDataMilano.Models { public class Orders { public string Date { get; set; } public string Name { get; set; } public string Adress { get; set; } } public class OrderManager { public static async Task<List<Orders>> GetOrders_1() { RestAPI rest = new RestAPI(

问题 I get the following error: 0x800a138f - JavaScript runtime error: Unable to get property 'activate' of undefined or null reference when running the following line of javascript in my UWP App: Windows.UI.Xaml.Window.activate(); Windows.UI.Xaml.Window.current.activate(); or Windows.UI.Core.CoreWindow.activate(); API Reference, Handle app activation Doc 回答1: Windows.Ui.Xaml and the docs you linked aren't relevant for HTML/JavaScript apps. Windows.UI.Xaml is used only in Xaml apps. To call

问题 I am beginner in UWP. I wanna add a click event to an image that change splitview 's open-status. So I have an image in ma xaml: <Image x:Name="image_1_6" HorizontalAlignment="Left" Height="200" Margin="1225,559,-171,0" VerticalAlignment="Top" Width="200" Source="Assets\images.jpg" PointerPressed="image_1_6_PointerPressed"/> I define image_1_6_PointerPressed as like as this: private void image_1_6_PointerPressed(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e) { mySplitView

问题 How to add a drop shadow for SplitView.Pane ? I tried DropShadowPanel from the UWP Community Toolkit UI Controls and wrote something like this: <SplitView DisplayMode="Overlay" PanePlacement="Right" Grid.Column="1" HorizontalAlignment="Stretch"> <SplitView.Pane> <controls:DropShadowPanel> <Frame Name="DetailsFrame" /> </controls:DropShadowPanel> </SplitView.Pane> </SplitView> However, the shadow appears inside the pane, while I want it to be outside SplitView.Pane , wrapping it. How can I

问题 I loading images source from internet and I need this images dominant color. Forexample this image and then found color thief but I cant understand. I using this method but I think it's wrong. BitmapDecoder BMD = new BitmapDecoder("https://yt3.ggpht.com/-cYK4gMKhvV0/AAAAAAAAAAI/AAAAAAAAAAA/8znlvBw-Wos/s100-c-k-no-mo-rj-c0xffffff/photo.jpg"); var colorThief = new ColorThief(); await colorThief.GetColor(BMD); How can I do it? 回答1: It is right that the GetColor method of ColorThief requires a

问题 below is the XAML code for my UWP app media element , but its not giving the customized media controls, why is that? <MediaElement x:Name="Media" Grid.Row="1" AutoPlay="True" AreTransportControlsEnabled="True" > <MediaElement.TransportControls> <MediaTransportControls Background="#FFF5F509" Foreground="#FF0625EA"/> </MediaElement.TransportControls> </MediaElement> 回答1: Although MediaTransportControls has Background and Foreground properties, but setting these properties won't affect the

问题 I am having a requirement on just want to show/display the Skype for business user presence(Busy, Available, Off Work etc) in UWP app. I have gone through the following documentations, Skype Web SDK I found that using Skype Web SDK we can show that but I am getting struck how can I use the Skype Web SDK in UWP app. Can anyone know how can I use the Skype Web SDK in UWP app? or If have any other way to get skype user presence please help me out. I also tried to use UCWA 2.0 , but got struck to

问题 in my application I have the following code: <UI:AdControl x:Name="ban2" Grid.Row="1" ApplicationId="xx" AdUnitId="xx" HorizontalAlignment="Center" Height="80" VerticalAlignment="Center" Width="480"></UI:AdControl> When using the test aplicationid and adunitId working properly, but when I go to replace with aplicationid and adunitId of my application created in the dev center no longer displays advertising. thank you 回答1: If you don't publish your app in the store, the Application Id and