uwp

问题 With Socket class, I can use Socket.ReceiveAsync method passing SocketFlags.Peek flag. I don't see anything similar for StreamSocket, however. UWP's InputStreamOptions enum provides Partial and ReadAhead flags but from their description it does not seem they are for the same purpose (checking data availability leaving the data in the input buffer). 来源： https://stackoverflow.com/questions/41165901/how-to-peek-streamsocket-for-data-in-uwp-apps

问题 I writing UWP app for windows 10 desktop I trying to connect to DB on server My code: using (MySqlConnection connection = new MySqlConnection("Database= milano_app2;Data Source=IP_OF_SERVER;User Id=USERNAME;Password=;SslMode=None;")) { connection.Open(); MySqlCommand createCommand = new MySqlCommand("CREATE TABLE demotable(salary int,surname varchar(255))", connection); createCommand.ExecuteNonQuery(); MySqlCommand addCommand = new MySqlCommand("INSERT INTO demotable (salary,surname) VALUES

问题 For the last three days I've been facing a quite a composite problem. I am trying to make an order taking app, to do this I wanted to have an ObservableCollection containing MainCategory items. Now the MainCategory items contained a CategoryName and another ObservableCollection of dishes. The dishes have those props: name, price and quantity. I did all this and the bindings and everything works perfectly. The problem is at the bottom of the page (outside the ListView which is nested inside a

问题 For UWP application I need to use methods from ComponentModel.TypeDescriptor class. After adding nuget package System.ComponentModel.TypeConverter, this class is available, but there is just only one available function. The reason for this is that project reference assembly from netstandard1.0 directory, than from netstandard1.5 directory where is fully implemented class. Is there any way to change project configuration that libraries from netstandard1.5 will be referenced ? or maybe drop

问题 I have overridden the default style of PasswordBox to achieve the center alignment of the text. Below is the code I have: <Page.Resources> <Style x:Key="PasswordStyle" TargetType="PasswordBox"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="PasswordBox"> <Grid Background="White" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"> <Grid.Resources> <Style x:Name="RevealButtonStyle" TargetType="Button"> <Setter Property="Template"> <Setter.Value>

问题 I am working on Xamarin cross platform project where if I placed the images inside the sub folder it is not loading on the screen. Please refer my code and folder structure along with properties 回答1: Put your Images folder under Assets Folder like this: Assets/Images/*.png and if you are using Localizing make like this: Assets/Images/en/*.png Assets/Images/another language/*.png for more information you can check this Working with Images i hope that answer you question. 来源： https:/

问题 I am creating a custom transport controls. In that, I have added an AppBarButton. To change the visibility of that I have created a Property for it, but for some reason, it doesn't work. The AppBarButton is always visible. Code of the Property //To change Visibility for CompactOverlayButton public bool IsCompactOverlayButtonVisible { get { return compactOverlayButton != null && compactOverlayButton.Visibility == Visibility.Visible; } set { if (compactOverlayButton != null) //To neglect the

问题 I am following a tutorial to implement a value converter. I receive an error for this code: public class BooleanToVisibilityConverter : IValueConverter { // } <Application x:Class="TestApp10.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:TestApp10" RequestedTheme="Light"> <Application.Resources> <local:BooleanToVisibilityConverter x:Key="TrueToVisibleConverter" /> <local

问题 I am following a tutorial to implement a value converter. I receive an error for this code: public class BooleanToVisibilityConverter : IValueConverter { // } <Application x:Class="TestApp10.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:TestApp10" RequestedTheme="Light"> <Application.Resources> <local:BooleanToVisibilityConverter x:Key="TrueToVisibleConverter" /> <local

问题 Regarding my universal app project, I am getting compilation warning: warning C4451: 'BackgroundServerTasks::ServerTask::Run::::deferral': Usage of ref class 'Windows::ApplicationModel::Background::BackgroundTaskDeferral' inside this context can lead to invalid marshaling of object across contexts note: Consider using 'Platform::Agile' instead in this file. How could I resolve this warning? Apparently, it is due to my using the BackgroundTaskDeferral within a create_task . I found no solution