WPF/C# - 对话框窗口不响应触摸

Question

我正在开发一个 C# WPF 应用程序，该应用程序旨在使用专门的触摸功能在完整的 Windows 10 平板电脑上运行。到目前为止，该应用程序运行良好，除了我的一个对话框窗口具有不喜欢被触摸的按钮。

对话框窗口 XAML：

<Window x:Class="Commencement_Organizer.ConfirmStudentWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:Commencement_Organizer"
    mc:Ignorable="d"
    Title="Confirmation" Topmost="True" Height="372.677" Width="578.225" ResizeMode="NoResize" WindowStartupLocation="CenterScreen" 
    WindowStyle="None" Background="White" AllowsTransparency="True" Stylus.IsTapFeedbackEnabled="False" Stylus.IsTouchFeedbackEnabled="False">

<Window.Triggers>
    <EventTrigger RoutedEvent="Window.Loaded">
        <BeginStoryboard>
            <Storyboard>
                <DoubleAnimation Duration="00:00:0.2" Storyboard.TargetProperty="Opacity" From="0" To="1" />
            </Storyboard>
        </BeginStoryboard>
    </EventTrigger>
</Window.Triggers>

<Grid Background="#FF171717">
    <Grid Margin="1" Background="White">
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <Button x:Name="YesButton" Content="Yes" Margin="25" Grid.Row="2" Click="YesButton_Click"/>
        <Button x:Name="NoButton" Content="No" Margin="25" Grid.Row="2" Grid.Column="1" Click="NoButton_Click"/>
        <Label x:Name="label" Content="Confirm your name" Margin="0" Grid.ColumnSpan="2" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="24"/>
        <Label x:Name="nameLabel" Content="Label" HorizontalAlignment="Center" Margin="0" Grid.Row="1" VerticalAlignment="Center" Grid.ColumnSpan="2" FontSize="24" FontWeight="Bold"/>

    </Grid>
</Grid>

实现（C#）：

ConfirmStudentWindow confirmWindow = new ConfirmStudentWindow(student);
        confirmWindow.Confirm += OnConfirm;

        // This window makes everything behind the dialog window a grey tint, which makes the dialog more prominent
        var darkwindow = new Window() 
        {
            Background = Brushes.Black,
            Opacity = 0.4,
            AllowsTransparency = true,
            WindowStyle = WindowStyle.None,
            WindowState = WindowState.Maximized,
            Topmost = true,
            Effect = new BlurEffect()
        };
        darkwindow.Show(); // Show grey background tint
        confirmWindow.ShowDialog(); // Stops main UI thread
        darkwindow.Close();

关于这一切的一切都按预期工作，除了当我尝试使用触摸屏来使用这些按钮时，它们只是保持突出显示，但实际上并没有点击。与鼠标完美配合。

在 2 种不同的 Windows 10 设备（Surface Pro 2 和 Surface Book）上进行了测试。

以问题的形式提出：

为什么将此窗口作为 Dialog 启动会使其具有抗触摸性，但如果它作为常规窗口启动则不会？

编辑 - 新问题：

除了启动一个始终位于顶部的常规窗口，然后在其后面放置一个有色覆盖，同时为窗口提供一个提供用户输入结果的事件处理程序，还有什么方法可以模拟对话框窗口？

Answer 1

我尝试了你的例子，它在我这边运行没有任何问题。我使用的是带触摸显示屏的 DELL 笔记本电脑，配备 W10 和 .NET 4.5.2。我可以建议您的一件事是尝试将 StylusUp（或 StylusDown，取决于您的逻辑）事件连接到对话框中的按钮上。我以前在只管理点击事件时确实遇到过类似的问题。

这对我有用，调用了确认方法并关闭了对话框。

确认StudentWindow.xaml.cs

using System;
using System.Windows;
using System.Windows.Input;

namespace DialogTouchTest
{
    /// <summary>
    /// Interaction logic for ConfirmStudentWindow.xaml
    /// </summary>
    public partial class ConfirmStudentWindow : Window
    {
        public Action Confirm;

        public ConfirmStudentWindow()
        {
            InitializeComponent();
        }

        private void YesButton_Click(object sender, RoutedEventArgs e)
        {
            e.Handled = true;
            Yes();
        }

        private void NoButton_Click(object sender, RoutedEventArgs e)
        {
            e.Handled = true;
            No();
        }

        private void YesButton_StylusUp(object sender, StylusEventArgs e)
        {
            e.Handled = true;
            Yes();
        }

        private void NoButton_StylusUp(object sender, StylusEventArgs e)
        {
            e.Handled = true;
            No();
        }

        private void Yes()
        {
            DialogResult = true;
            Confirm();
        }

        private void No()
        {
            DialogResult = false;
        }
    }
}

确认StudentWindow.xaml

<Window x:Class="DialogTouchTest.ConfirmStudentWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Title="Confirmation" Topmost="True" Height="372.677" Width="578.225" ResizeMode="NoResize" WindowStartupLocation="CenterScreen" 
    WindowStyle="None" Background="White" AllowsTransparency="True" Stylus.IsTapFeedbackEnabled="False" Stylus.IsTouchFeedbackEnabled="False">

    <Window.Triggers>
        <EventTrigger RoutedEvent="Window.Loaded">
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Duration="00:00:0.2" Storyboard.TargetProperty="Opacity" From="0" To="1" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </Window.Triggers>

    <Grid Background="#FF171717">
        <Grid Margin="1" Background="White">
            <Grid.RowDefinitions>
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>

            <Button x:Name="YesButton" Content="Yes" Margin="25" Grid.Row="2" StylusUp="YesButton_StylusUp" Click="YesButton_Click"/>
            <Button x:Name="NoButton" Content="No" Margin="25" Grid.Row="2" Grid.Column="1" StylusUp="NoButton_StylusUp" Click="NoButton_Click"/>
            <Label x:Name="label" Content="Confirm your name" Margin="0" Grid.ColumnSpan="2" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="24"/>
            <Label x:Name="nameLabel" Content="Label" HorizontalAlignment="Center" Margin="0" Grid.Row="1" VerticalAlignment="Center" Grid.ColumnSpan="2" FontSize="24" FontWeight="Bold"/>

        </Grid>
    </Grid>
</Window>

MainWindow.xaml.cs

using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Effects;

namespace DialogTouchTest
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            ConfirmStudentWindow confirmWindow = new ConfirmStudentWindow();
            confirmWindow.Confirm += OnConfirm;

            // This window makes everything behind the dialog window a grey tint, which makes the dialog more prominent
            var darkwindow = new Window()
            {
                Background = Brushes.Black,
                Opacity = 0.4,
                AllowsTransparency = true,
                WindowStyle = WindowStyle.None,
                WindowState = WindowState.Maximized,
                Topmost = true,
                Effect = new BlurEffect()
            };
            darkwindow.Show(); // Show grey background tint
            confirmWindow.ShowDialog(); // Stops main UI thread
            darkwindow.Close();
        }

        private void OnConfirm()
        {

        }
    }
}