c# - 'MouseEventArgs' 不包含 'GetPosition' 的定义

Question

我确信这是一个 super 简单的过程，但我正在开发 C# UWP 应用程序并试图制作可拖动的用户控件，但在我的鼠标事件中我收到以下错误:

CS1061“MouseEventArgs”不包含“GetPosition”的定义，并且找不到接受“MouseEventArgs”类型的第一个参数的扩展方法“GetPosition”(是否缺少 using 指令或程序集引用？)

我发现这个例子是我在堆栈上使用的 ( Dragging a WPF user control ) 并且之前使用鼠标按下事件在 winforms 中的列表框之间拖动项目但是没有这个问题。

这是我的代码:

<UserControl
    x:Class="HopHaus.TimerControl"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:HopHaus"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300"
    d:DesignWidth="400" Width="120" Height="60">

    <Grid Margin="0,0,0,167" Width="120">
        <Rectangle Fill="#FF404040" HorizontalAlignment="Left" Height="60" Margin="1,0,-1,-133" Stroke="Black" VerticalAlignment="Top" Width="120"/>
        <TextBox x:Name="timersetBox" Margin="-1,-2,1,-59" TextWrapping="Wrap" Text="00" VerticalAlignment="Top" Height="60" BorderBrush="Transparent" FontFamily="Fonts/DIGITAL.TTF#Digital" Foreground="#FF72FB00" FontSize="50" Background="Transparent" TextAlignment="Right" AcceptsReturn="True" SelectionHighlightColor="#000078D7" Width="120"/>
        <Border x:Name="dragBrdr" BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Left" Height="59" Margin="2,0,0,-59" VerticalAlignment="Top" Width="118"/>
    </Grid>
</UserControl>

和:

 public sealed partial class TimerControl : UserControl
    {
        Point currentPoint;
        Point anchorPoint;
        bool isInDrag;
        public TimerControl()
        {
            this.InitializeComponent();
        }

        private TranslateTransform transform = new TranslateTransform();
        private void root_MouseMove(object sender, MouseEventArgs e)
        {
            if (isInDrag)
            {
                var element = sender as FrameworkElement;
                currentPoint = e.GetPosition(null);

                transform.X += currentPoint.X - anchorPoint.X;
                transform.Y += (currentPoint.Y - anchorPoint.Y);
                this.RenderTransform = transform;
                anchorPoint = currentPoint;
            }
        }
    }

我同时使用 System.Windows.Input 和 using Windows.Devices.Input

非常感谢您提供的任何帮助。

Answer 1

为了更好地支持触摸和墨迹书写，对鼠标事件进行了抽象。这称为指针。所以你有一个 PointerMoved 事件

在 xaml 中:

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
          PointerMoved="Grid_PointerMoved">

    </Grid>

在代码中

    private void Grid_PointerMoved(object sender, PointerRoutedEventArgs e)
    {
        var point = e.GetCurrentPoint(null);
    }