在 WPF 中有没有一种方法可以删除主窗口的边框，但允许调整该窗口的大小（没有夹点）？
我意识到有一种方法可以通过将调整大小模式设置为CanResizeWithGrip 来实现这种情况。但是，我希望能够将调整大小模式设置为CanResize。
我尝试设置以下内容：
ResizeMode="CanResize"
WindowStyle="None"
AllowsTransparency="True"
但是，通过设置AllowsTransparency，它会取消在没有夹点的情况下调整大小的功能。有什么想法可以解决这个问题吗？
我还应该注意，无论如何我都不能将AllowsTransparency 设置为true，因为我在我的窗口中使用了一个winformshost 控件，当AllowsTransparency 为true 时不会显示该控件。
【问题讨论】：
我知道这是一个老问题，但我只是想为新手提供一个工作示例。
Xaml 窗口：
<Window x:Class="CustomWindowDemo.DemoCustomWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:CustomWindowDemo"
mc:Ignorable="d"
Title="DemoCustomWindow" Height="300" Width="300" Background="{x:Null}" AllowsTransparency="True" WindowStyle="None">
<Window.Resources>
<Style x:Key="BorderThumb" TargetType="Thumb">
<Setter Property="SnapsToDevicePixels" Value="true" />
<Setter Property="OverridesDefaultStyle" Value="true" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Thumb">
<Rectangle MinWidth="4" MinHeight="4" StrokeThickness="0">
<Rectangle.Fill>
<SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}" Opacity="0.05"/>
</Rectangle.Fill>
</Rectangle>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Border BorderBrush="#55FFFFFF" BorderThickness="1" CornerRadius="5">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Border MouseMove="Header_MouseMove" DockPanel.Dock="Top" Height="32" Grid.Row="1" Grid.Column="1">
<Border.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,3">
<GradientStop Color="#3BB2EA" Offset="0" />
<GradientStop Color="#EFF7FA" Offset="0.3" />
</LinearGradientBrush>
</Border.Background>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock VerticalAlignment="Center" HorizontalAlignment="Left" Margin="10,0,0,0" Text="{Binding Path=Title, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}}"/>
<Button x:Name="btn_Minimize" Background="{x:Null}" BorderBrush="{x:Null}" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" BorderThickness="0" Click="btn_Minimize_Click" Grid.Column="1">
<Image Source="Resources/Ahmadhania-Spherical-Minimize.ico"/>
</Button>
<Button x:Name="btn_Maximize" Background="{x:Null}" BorderBrush="{x:Null}" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" BorderThickness="0" Grid.Column="2" Click="btn_Maximize_Click">
<Image Source="Resources/1412181205_61002.ico"/>
</Button>
<Button x:Name="btn_Close" Background="{x:Null}" BorderBrush="{x:Null}" Style="{StaticResource {x:Static ToolBar.ButtonStyleKey}}" BorderThickness="0" Grid.Column="3" Click="btn_Close_Click">
<Image Source="Resources/Ahmadhania-Spherical-Close(1).ico"/>
</Button>
</Grid>
</Border>
<Thumb x:Name="ThumbBottom" DragDelta="ThumbBottom_DragDelta" HorizontalAlignment="Stretch" Cursor="SizeNS" Grid.Column="0" Background="{x:Null}" Margin="3,0" Grid.ColumnSpan="3" Grid.Row="3" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}"/>
<Thumb x:Name="ThumbTop" DragDelta="ThumbTop_DragDelta" HorizontalAlignment="Stretch" Cursor="SizeNS" Grid.Column="0" Background="{x:Null}" Margin="3,0" Grid.ColumnSpan="3" Height="4" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}"/>
<Thumb x:Name="ThumbBottomRightCorner" DragDelta="ThumbBottomRightCorner_DragDelta" HorizontalAlignment="Right" Cursor="SizeNWSE" Grid.Row="3" Grid.Column="3" Background="{x:Null}" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}"/>
<Thumb x:Name="ThumbTopRightCorner" DragDelta="ThumbTopRightCorner_DragDelta" HorizontalAlignment="Right" Cursor="SizeNESW" Grid.Row="0" Grid.Column="2" Background="{x:Null}" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}"/>
<Thumb x:Name="ThumbTopLeftCorner" DragDelta="ThumbTopLeftCorner_DragDelta" HorizontalAlignment="Left" Cursor="SizeNWSE" Grid.Row="0" Grid.Column="0" Background="{x:Null}" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}" />
<Thumb x:Name="ThumbBottomLeftCorner" DragDelta="ThumbBottomLeftCorner_DragDelta" HorizontalAlignment="Left" Cursor="SizeNESW" Grid.Row="3" Grid.Column="0" Background="{x:Null}" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}" />
<Thumb x:Name="ThumbRight" DragDelta="ThumbRight_DragDelta" Cursor="SizeWE" Grid.Column="2" Grid.RowSpan="4" Background="{x:Null}" Margin="0,3" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}"/>
<Thumb x:Name="ThumbLeft" DragDelta="ThumbLeft_DragDelta" Cursor="SizeWE" Grid.Column="0" Grid.RowSpan="4" HorizontalContentAlignment="Right" Background="{x:Null}" Margin="0,3" Style="{Binding Mode=OneWay, Source={StaticResource BorderThumb}}"/>
<Grid x:Name="Grid_Content" Background="#EFF7FA" Grid.Row="2" Grid.Column="1">
</Grid>
</Grid>
</Border>
</Window>
后面的C#代码：
using System.Windows.Interop;
using winforms = System.Windows.Forms;
namespace CustomWindowDemo
{
/// <summary>
/// Interaction logic for DemoCustomWindow.xaml
/// </summary>
public partial class DemoCustomWindow : Window
{
bool Maximized = false;
int NormalWidth = 0;
int NormalHeight = 0;
int NormalX = 0;
int NormalY = 0;
public DemoCustomWindow()
{
InitializeComponent();
}
#region Header & Resize
void Header_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
if (e.LeftButton == System.Windows.Input.MouseButtonState.Pressed)
this.DragMove();
}
void ThumbBottomRightCorner_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Width + e.HorizontalChange > 10)
this.Width += e.HorizontalChange;
if (this.Height + e.VerticalChange > 10)
this.Height += e.VerticalChange;
}
void ThumbTopRightCorner_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Width + e.HorizontalChange > 10)
this.Width += e.HorizontalChange;
if (this.Top + e.VerticalChange > 10)
{
this.Top += e.VerticalChange;
this.Height -= e.VerticalChange;
}
}
void ThumbTopLeftCorner_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Left + e.HorizontalChange > 10)
{
this.Left += e.HorizontalChange;
this.Width -= e.HorizontalChange;
}
if (this.Top + e.VerticalChange > 10)
{
this.Top += e.VerticalChange;
this.Height -= e.VerticalChange;
}
}
void ThumbBottomLeftCorner_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Left + e.HorizontalChange > 10)
{
this.Left += e.HorizontalChange;
this.Width -= e.HorizontalChange;
}
if (this.Height + e.VerticalChange > 10)
this.Height += e.VerticalChange;
}
void ThumbRight_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Width + e.HorizontalChange > 10)
this.Width += e.HorizontalChange;
}
void ThumbLeft_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Left + e.HorizontalChange > 10)
{
this.Left += e.HorizontalChange;
this.Width -= e.HorizontalChange;
}
}
void ThumbBottom_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Height + e.VerticalChange > 10)
this.Height += e.VerticalChange;
}
void ThumbTop_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
if (this.Top + e.VerticalChange > 10)
{
this.Top += e.VerticalChange;
this.Height -= e.VerticalChange;
}
}
void btn_Minimize_Click(object sender, RoutedEventArgs e)
{
WindowState = WindowState.Minimized;
}
void btn_Maximize_Click(object sender, RoutedEventArgs e)
{
if (Maximized == true)
{
this.Width = NormalWidth;
this.Height = NormalHeight;
this.Left = NormalX;
this.Top = NormalY;
Maximized = false;
Thumbs();
}
else
{
NormalX = (int)this.Left;
NormalY = (int)this.Top;
NormalHeight = (int)this.Height;
NormalWidth = (int)this.Width;
this.Left = winforms.Screen.FromHandle(new WindowInteropHelper(this).Handle).WorkingArea.Left;
this.Top = winforms.Screen.FromHandle(new WindowInteropHelper(this).Handle).WorkingArea.Top;
this.Width = winforms.Screen.FromHandle(new WindowInteropHelper(this).Handle).WorkingArea.Width;
this.Height = winforms.Screen.FromHandle(new WindowInteropHelper(this).Handle).WorkingArea.Height;
Maximized = true;
Thumbs();
}
}
void btn_Close_Click(object sender, RoutedEventArgs e)
{
Close();
}
void Thumbs()
{
if (Maximized == true)
{
ThumbBottom.Visibility = Visibility.Collapsed;
ThumbLeft.Visibility = Visibility.Collapsed;
ThumbTop.Visibility = Visibility.Collapsed;
ThumbRight.Visibility = Visibility.Collapsed;
ThumbTopLeftCorner.Visibility = Visibility.Collapsed;
ThumbTopRightCorner.Visibility = Visibility.Collapsed;
ThumbBottomLeftCorner.Visibility = Visibility.Collapsed;
ThumbBottomRightCorner.Visibility = Visibility.Collapsed;
}
else
{
ThumbBottom.Visibility = Visibility.Visible;
ThumbLeft.Visibility = Visibility.Visible;
ThumbTop.Visibility = Visibility.Visible;
ThumbRight.Visibility = Visibility.Visible;
ThumbTopLeftCorner.Visibility = Visibility.Visible;
ThumbTopRightCorner.Visibility = Visibility.Visible;
ThumbBottomLeftCorner.Visibility = Visibility.Visible;
ThumbBottomRightCorner.Visibility = Visibility.Visible;
}
}
#endregion
}
}
【讨论】：
如果 ResizeBorderThickness 设置为 0，就会发生这种情况。
可以像这样在 XAML 中设置为正值：
<WindowChrome>
<WindowChrome.ResizeBorderThickness>
<Thickness>1</Thickness>
</WindowChrome.ResizeBorderThickness>
</WindowChrome>
【讨论】：
用户需要与之交互来调整窗口大小。如果您不喜欢默认边框或夹点，则需要添加一些其他控件，通过单击和拖动行为来调整窗口大小。也许窗口的每个边缘都有一条线？
【讨论】：
您可以使用 WPF 可自定义窗口库，可在此处获得：http://wpfwindow.codeplex.com/
然后，当使用库的窗口类型时，您可以设置与上面列出的相同的属性
<CustomWindow:EssentialWindow x:Class="CustomWindowDemo.DemoEssentialWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:CustomWindow="clr-namespace:CustomWindow;assembly=CustomWindow"
AllowsTransparency="True" ResizeMode="CanResize" WindowStyle="None" Title="EssentialWindow"
Height="300" Width="250">
【讨论】：
最简单，但也许过于简单的是
this.MouseLeftButtonDown += delegate { this.DragMove(); };
【讨论】：