我有一個包含的膨脹機的用戶控件設置背景:XAML用戶控件 - 基於觸發器
<UserControl x:Class="Client.DevicesExpander"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
x:Name="devicesExpander" >
<Expander Margin="1" Name="expander" FontSize="11" BorderThickness="1" BorderBrush="DarkRed" Foreground="Black" Header="{Binding ElementName=devicesExpander, Path=Header}" FontWeight="Bold" MouseDoubleClick="Expander_MouseDoubleClick" Expanded="Expander_Expanded" IsExpanded="{Binding ElementName=devicesExpander, Path=IsExpanded}" Background="{Binding ElementName=devicesExpander, Path=Background}">
<StackPanel Name="_devicesPanel">
<ListBox BorderThickness="0,1,0,0" Name="_devicesList" FontWeight="Normal" MouseDoubleClick="DevicesList_MouseDoubleClick" Background="{Binding ElementName=devicesExpander, Path=Background}" />
</StackPanel>
<Expander.Style>
<Style TargetType="{x:Type Expander}">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=devicesExpander, Path=IsExpanded}" Value="True">
<Setter Property="Background" Value="White" />
</DataTrigger>
</Style.Triggers>
</Style>
</Expander.Style>
</Expander>
</UserControl>
答案基本上所有我想要做的是改變基礎上的的IsExpanded的擴展和StackPanel中的背景顏色UserControl(或擴展器)。
我已經添加了三個扶養屬性來控制:
public static readonly DependencyProperty HeaderProperty = DependencyProperty.Register("Header", typeof(string), typeof(DevicesExpander));
public static readonly DependencyProperty IsExpandedProperty = DependencyProperty.Register("IsExpanded", typeof(bool), typeof(DevicesExpander));
public static readonly DependencyProperty BackgroundProperty = DependencyProperty.Register("Background", typeof(System.Windows.Media.Brush), typeof(DevicesExpander));
但我的代碼不能正常工作。從usercontrol的IsExpanded屬性確實工作,因爲當從放置usercontrol的窗口中檢查屬性時,屬性會相應地發生變化(當擴展器展開時)。
如何根據UserControl.IsExpanded屬性更改擴展器的背景顏色?
謝謝!
編輯: 我在同時做了以下:
<UserControl.Resources>
<Style TargetType="{x:Type UserControl}">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=devicesExpander, Path=IsExpanded}" Value="True">
<Setter Property="Background" Value="White" />
</DataTrigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
<Expander Margin="1" Name="expander" FontSize="11" BorderThickness="1" BorderBrush="DarkRed" Foreground="Black" Header="{Binding ElementName=devicesExpander, Path=Header}" FontWeight="Bold" MouseDoubleClick="Expander_MouseDoubleClick" Expanded="Expander_Expanded" IsExpanded="{Binding ElementName=devicesExpander, Path=IsExpanded}" Background="Transparent">
<StackPanel Name="_devicesPanel">
<ListBox BorderThickness="0,1,0,0" Name="_devicesList" FontWeight="Normal" MouseDoubleClick="DevicesList_MouseDoubleClick" Background="Transparent" />
</StackPanel>
</Expander>
並刪除了BackgroundProperty扶養財產。我實際上認爲這可以工作,但唉...