目的：遮挡下面的窗体
WPF 窗口去除顶部边框（正宗无边框）
最近在做一个大屏展示视频图片的项目，功能并不复杂，半天的工作量吧，一开始同事采用的Unity3D进行开发，但是里面要播放4K视频，Unity 的短板就是视频的播放了，今晚就要交付了，我一早就来公司，决定用WPF重新开发一版，各项功能都好了，唯独顶部总是显示一条白色的边，已经设置WindowStyle为None了也没用，幸得网上大神提供的资料，终于解决了这个小问题。
XAML内容如下：
<Window x:Class="WPF_VideoPlayer.MainWindow"xmlns="/winfx//xaml/presentation"xmlns:x="/winfx//xaml"xmlns:d="/expression/blend/"xmlns:mc="/markup-compatibility/"xmlns:local="clr-namespace:WPF_VideoPlayer"mc:Ignorable="d"Title="MainWindow" Height="350" Width="2880" Loaded="Window_Loaded" WindowChrome.WindowChrome="{DynamicResource WindowChromeKey}" AllowsTransparency="True" WindowStyle="None" ResizeMode="NoResize" WindowState="Maximized" Topmost="True" Background="Black"><Window.Resources><WindowChrome x:Key="WindowChromeKey"><WindowChrome.ResizeBorderThickness><Thickness>0</Thickness></WindowChrome.ResizeBorderThickness></WindowChrome></Window.Resources><Grid></Grid></Window>
具有透明背景且包含不透明控件的WPF窗口
<Window x:Class="WpfApplication3.MainWindow"xmlns="/winfx//xaml/presentation"xmlns:x="/winfx//xaml"Title="MainWindow" Height="350" Width="525"AllowsTransparency="True" WindowStyle="None"><Window.Background><SolidColorBrush Opacity="0.5" Color="White"/></Window.Background><Grid><Button Width="200" Height="50">button</Button></Grid></Window>
项目XAML:
<Window x:Class="WpfApp5.MainWindow"xmlns="/winfx//xaml/presentation"xmlns:x="/winfx//xaml"xmlns:d="/expression/blend/"xmlns:mc="/markup-compatibility/"xmlns:local="clr-namespace:WpfApp5"mc:Ignorable="d"Title="MainWindow" Height="1080" Width="1920" WindowChrome.WindowChrome="{DynamicResource WindowChromeKey}" AllowsTransparency="True" WindowStyle="None" ResizeMode="NoResize" WindowState="Maximized" Topmost="True" ><Window.Resources><WindowChrome x:Key="WindowChromeKey"><WindowChrome.ResizeBorderThickness><Thickness>0</Thickness></WindowChrome.ResizeBorderThickness></WindowChrome></Window.Resources><Window.Background><SolidColorBrush Opacity="0" Color="White"/></Window.Background><!--<Grid ShowGridLines="True">--><Grid ><Grid.RowDefinitions><RowDefinition Height="50"></RowDefinition><RowDefinition Height="395"></RowDefinition><RowDefinition Height="402"></RowDefinition><RowDefinition Height="186"></RowDefinition><RowDefinition Height="49"></RowDefinition></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition Width="540"/><ColumnDefinition Width="398"/><ColumnDefinition Width="508"/><ColumnDefinition Width="833"/></Grid.ColumnDefinitions><Button Grid.Row="1" Grid.Column="0" Name="btn1" Content="实 时 图 像" VerticalContentAlignment="Center" FontSize="40" FontFamily="Microsoft YaHei UI" Foreground="White" Background="#0850a0" Opacity="1"/><Button Grid.Row="1" Grid.Column="1" Grid.RowSpan="2" Name="btn2" Content="截 取 图 像" Foreground="White" VerticalContentAlignment="Center" FontSize="40" FontFamily="Microsoft YaHei UI" Background="#0850a0" Opacity="1"/><Button Grid.Row="1" Grid.Column="3" Grid.RowSpan="2" Name="btn3" Background="#0850a0" Opacity="1"/><Button Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="3" Name="btn4" Background="#0850a0" Opacity="1"/><Button Grid.Column="0" Grid.Row="4" Grid.ColumnSpan="4" Name="btn5" Background="#0850a0" Opacity="1"/></Grid></Window>
