WPF / c# -对话框窗口不响应触摸

本文关键字：窗口 不响应 触摸 对话框 WPF | 更新日期: 2023-09-27 18:08:40

我正在开发一个c# WPF应用程序，打算在完全使用触摸的Windows 10平板电脑上运行。到目前为止，这款应用运行得很好，只是我的一个对话框窗口的按钮不喜欢被触摸。

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();

这一切都是预期的，除了当我尝试使用触摸屏使用这些按钮时，它们只是突出显示，但实际上没有点击。与鼠标配合使用效果非常好。

在两个不同的Windows 10设备(Surface Pro 2和Surface Book)上进行了测试。

以疑问句的形式表达:

为什么以对话框的形式启动这个窗口可以使它抵抗触摸，但如果它以常规窗口的形式启动则不会?

编辑-新问题:

是否有任何方法来模拟一个对话框窗口，而不是启动一个常规的窗口，总是停留在顶部，然后把一个有色的覆盖在它后面，同时给窗口一个事件处理程序，提供用户输入的结果?

WPF / c# -对话框窗口不响应触摸

比较两个相同的.Show()方法，一个从ViewModel执行，另一个在代码隐藏中执行，我发现代码隐藏实例没有检测触摸。

我的解决方案是从代码后面调用主UI线程上的方法:

Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (Action)(() =>
{
     window.Show()
}));

请注意，如果您希望从对话框中获得结果，则需要将其包含在'分派'中。方法，否则无法正常工作。

理想情况下，将所有相关逻辑分组将是最好的方法。

我试过你的例子，它运行没有任何问题在我结束。我使用的是戴尔笔记本电脑与触摸显示W10和。net 4.5.2。我可以建议你的一件事是尝试将StylusUp(或StylusDown，这取决于你的逻辑)事件连接到对话框中的按钮上。我在过去只管理click事件时遇到过类似的问题。

这对我有效，确认方法被调用，对话框关闭。

ConfirmStudentWindow.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;
        }
    }
}

ConfirmStudentWindow.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()
        {
        }
    }
}
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