拖动一个无边框窗口

代码

DragBorderlessWindowSample.xaml

<Window
    x:Class="Drag_a_Borderless_Window_Sample.DragBorderlessWindowSample"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Title="DragBorderlessWindowSample"
    Width="800"
    Height="450"
    AllowsTransparency="True"
    Background="Gray"
    MouseLeftButtonDown="Window_MouseLeftButtonDown"
    WindowStyle="None"
    mc:Ignorable="d">
    <Grid>
        <Button
            Name="btnClose"
            Width="75"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Click="BtnClose_OnClick"
            Content="Close" />
    </Grid>
</Window>

DragBorderlessWindowSample.xaml

        private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            this.DragMove();
        }
        private void BtnClose_OnClick(object sender, RoutedEventArgs e)
        {
            Close();
        }

效果