眾所周知，在WinForm中，如果要製作一個無邊框窗體，可以將窗體的FormBorderStyle屬性設定為None來完成。如果要製作成異形窗體，則需要使用圖片或者使用GDI+自定義繪製。

那麼，在WPF中，我們怎樣製作一個無邊框窗體呢？

答案是將Window的WindowStyle屬性設定為None，即WindowStyle="None" 。如果是非矩形的異形窗體，則需要將背景設為Null,將允許透明設定為True,也就是：Background="{x:Null}"  AllowsTransparency="True"，可能有些人還希望這個視窗可以拖來拖去，那麼，就還需要設定MouseLeftButtonDown事件，比如：MouseLeftButtonDown="DragWindow"，這裡DragWindow由Window的DragMove()來完成。想關閉視窗？那就自己做一個按鈕，然後使用Window本身的Close()方法吧。

下面是效果：這裡右上角有個圓形的X按鈕，是用Button，但將它的樣式設定成了圓角矩形制作的。具體程式碼見下：XAML程式碼：// Window1.xaml<Window x:Class="BorderlessWindow.Window1"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Title="BorderlessWindow" Height="300" Width="300"  WindowStyle="None" Background="{x:Null}"  AllowsTransparency="True"  MouseLeftButtonDown="DragWindow"

    > <Window.Resources>  <Style x:Key="ButtonStyle" TargetType="{x:Type Button}">   <Setter Property="Foreground" Value="White"/>   <Setter Property="Template">    <Setter.Value><!--設定樣式 -->     <ControlTemplate TargetType="{x:Type Button}">      <Grid>       <Rectangle x:Name="Rectangle" Stroke="#FFFFFFFF" StrokeMiterLimit="1.000000" StrokeThickness="0.500000" RadiusX="10" RadiusY="10" Fill="#FF777777">       </Rectangle>       <ContentPresenter x:Name="ContentPresenter" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"                         VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/>      </Grid><!-- 設定滑鼠移到關閉按鈕上的效果 -->      <ControlTemplate.Triggers>       <Trigger Property="IsMouseOver" Value="true">        <Setter Property="Fill" TargetName="Rectangle">         <Setter.Value>          <SolidColorBrush Color="White"></SolidColorBrush>         </Setter.Value>        </Setter>        <Setter Property="Foreground" Value="Black"></Setter>       </Trigger>             </ControlTemplate.Triggers>     </ControlTemplate>    </Setter.Value>   </Setter>  </Style> </Window.Resources><!-- 窗體中的內容 --> <Grid><!-- 窗體的邊框，底色設定，注意將CornerRadius與左上角“X”叉形按鈕的設定保持一致或約大於叉形按鈕的RadiusX/Y設定 --> <Border CornerRadius="10,10,10,10" Background="Orange" Height="Auto" BorderBrush="Teal" BorderThickness="1"> </Border><!--左上角的“X”叉形按鈕--> <Button Name="Button1" Style="{StaticResource ButtonStyle}" Click="CloseWindow" Width="15" Height="15" Content="X" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="3,3,3,3"></Button>    <Button Height="23" Margin="96,101,121,0" Name="button2" VerticalAlignment="Top">Test Button</Button>  </Grid></Window>

C#程式碼：// Window1.xaml.csusing System;using System.Collections.Generic;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Shapes;

namespace BorderlessWindow{    /// <summary>    /// Interaction logic for Window1.xaml    /// </summary>

    public partial class Window1 : System.Windows.Window    {

        public Window1()        {            InitializeComponent();        }

        public void DragWindow(object sender, MouseButtonEventArgs args)        {            this.DragMove();        }

        public void CloseWindow(object sender, RoutedEventArgs args)        {            this.Close();        }    }}