鼠标事件

1.移动、点击

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition Height="auto"></RowDefinition>
            <RowDefinition Height="auto"></RowDefinition>
        </Grid.RowDefinitions>
        <Rectangle Name="rect" Fill="LightBlue" MouseMove="Rect_MouseMove" Grid.Row="0"></Rectangle>
        <Button Grid.Row="1" Name="btn" Click="Button_Click">捕获鼠标</Button>
        <TextBlock Name="lblInfo" Grid.Row="2"></TextBlock>
    </Grid>

　　图：

　　点击 捕获鼠标  会失去光标

　　后台事件代码

        private void Rect_MouseMove(object sender, MouseEventArgs e)
        {
            Point point = e.GetPosition(this);
            this.lblInfo.Text = $"({point.X},{point.Y})";
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Mouse.Capture(this.rect); // 焦点被捕捉了，再无法使用鼠标进行操作，除非光标离开窗口再回来
            this.btn.Content = "鼠标被捕捉了";
        }

 2.拖动事件

    <Grid>
        <TextBox HorizontalAlignment="Left" Height="23" TextWrapping="Wrap" Text="你好" VerticalAlignment="Top" Width="120" Margin="95,110,0,0"/>
        <TextBox HorizontalAlignment="Left" Height="23" TextWrapping="Wrap" Text="你也好" VerticalAlignment="Top" Width="120" Margin="95,190,0,0"/>
        <Label Content="你好" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="400,110,0,0" Height="27" Width="155" MouseDown="Label_MouseDown"/>
        <Label AllowDrop="True" Content="你也好" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="400,186,0,0" Height="27" Width="130" Drop="Label_Drop"/>
    </Grid>

　　后台

        private void Rect_MouseMove(object sender, MouseEventArgs e)
        {
            Point point = e.GetPosition(this);
            this.lblInfo.Text = $"({point.X},{point.Y})";
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Mouse.Capture(this.rect); // 焦点被捕捉了，再无法使用鼠标进行操作，除非光标离开窗口再回来
            this.btn.Content = "鼠标被捕捉了";
        }

　　图

 3.改变鼠标光标

　　页面代码

<Label Cursor="Help" MouseDoubleClick="Label_MouseDoubleClick" Height="30" Width="60" Margin="95,265,160,124">查看帮助</Label>

　　后台代码

        private void Label_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            MessageBox.Show("这是一个帮助信息");
        }

　　效果

　　鼠标指导这个label  有个问号，双击显示帮助信息