我有一个ControlTemplate，我定义为以我所需的格式显示View模型。但是，我无法从控件模板的DataTrigger设置Image的source属性。请帮帮我。
<ControlTemplate x:Key="GeneralControlTemplate"
TargetType="{x:Type local:ComponentStatisticsControl}">
<Border CornerRadius="3"
BorderThickness="2"
BorderBrush="SkyBlue"
Margin="8,0,0,0">
<Border.Background>
<SolidColorBrush x:Name="ControlBackground" Color="Transparent"/>
</Border.Background>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Label Foreground="Blue"
Grid.Row="0"
FontSize="14"
FontWeight="SemiBold"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Content="{Binding Path=Title, RelativeSource={RelativeSource TemplatedParent}}"/>
<Grid Grid.Row="1">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<GroupBox Header="Component Info"
Grid.Row="0"
Foreground="Maroon"
FontWeight="SemiBold">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Label Content="IP Address"
Grid.Column="0"
Grid.Row="0"/>
<Label Content="{Binding Path=AdditionalContent.IPAddress, RelativeSource={RelativeSource TemplatedParent}}"
Grid.Row="0"
HorizontalAlignment="Right"
Grid.Column="1"/>
<Label Content="PortNo"
Grid.Column="0"
Grid.Row="1"/>
<Label Content="{Binding Path=AdditionalContent.PortNo, RelativeSource={RelativeSource TemplatedParent}}"
Grid.Row="1"
HorizontalAlignment="Right"
Grid.Column="1"/>
<Label Content="Status"
Grid.Column="0"
Grid.Row="2"/>
<Image Name="imgStatus"
Height="24"
Width="24"
Stretch="Fill"
HorizontalAlignment="Right"
Grid.Column="1"
Grid.Row="2">
</Image>
</Grid>
</GroupBox>
<Expander Header="Queue Statistics"
Grid.Row="1"
ExpandDirection="Down"
IsExpanded="True"
Foreground="DarkOrange"
FontWeight="SemiBold">
<ItemsControl ItemsSource="{Binding Path=AdditionalContent.QueueStatistics, RelativeSource={RelativeSource TemplatedParent}}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Grid.IsSharedSizeScope="True"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="{x:Type lappmodel:clsQueueStatistics}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="ColumnOne"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Label Content="{Binding QName}"/>
<Label Content="{Binding Count}"
Margin="8,0,0,0"
HorizontalAlignment="Right"
Grid.Column="1"/>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Expander>
<GroupBox Header="Connection Statistics"
Foreground="DarkOrange"
Grid.Row="2"
FontWeight="SemiBold">
<ItemsControl ItemsSource="{Binding Path=AdditionalContent.ConnectionInformation, RelativeSource={RelativeSource TemplatedParent}}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Grid.IsSharedSizeScope="True" Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="{x:Type lappmodel:clsComponentConnectionInfo}">
<Border CornerRadius="3"
BorderThickness="1"
BorderBrush="Gray"
x:Name="borderConnectionInfo">
<Border.Background>
<SolidColorBrush Color="Transparent"/>
</Border.Background>
<Grid>
<Grid.Background>
<SolidColorBrush x:Name="gridconnectioninfo"
Color="Transparent"/>
</Grid.Background>
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="ColumnOne"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Label Content="Component"
Grid.Row="0"/>
<Label Content="{Binding Identifier}"
Grid.Column="1"
Grid.Row="0"
HorizontalAlignment="Right"/>
<Label Content="Component Id"
Grid.Row="1"/>
<Label Content="{Binding ComponentId}"
Grid.Column="1"
Grid.Row="1"
Foreground="Blue"
HorizontalAlignment="Right"/>
<Label Content="BytesSent"
Grid.Row="2"/>
<Label Content="{Binding BytesSent}"
Grid.Row="2"
Grid.Column="1"
HorizontalAlignment="Right"/>
<Label Content="BytesReceived"
Grid.Row="3"/>
<Label Content="{Binding BytesReceived}"
Grid.Row="3"
Grid.Column="1"
HorizontalAlignment="Right"/>
<Label Content="Connected"
Grid.Row="4"/>
<Image x:Name="imgConnectedStatus"
Grid.Row="4"
Grid.Column="1"
HorizontalAlignment="Right"
Height="24"
Width="24">
</Image>
</Grid>
</Border>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding IsConnected}" Value="True">
<Setter Property="Source"
TargetName="imgConnectedStatus"
Value="/Resources/GreenDot.png"/>
</DataTrigger>
<DataTrigger Binding="{Binding IsConnected}" Value="False">
<Setter Property="Source"
TargetName="imgConnectedStatus"
Value="/Resources/red-dot2.png"/>
<DataTrigger.EnterActions>
<BeginStoryboard>
<Storyboard Duration="0:0:0.200"
AutoReverse="True"
RepeatBehavior="Forever">
<ColorAnimation From="Red"
To="DarkRed"
Storyboard.TargetName="borderConnectionInfo"
Storyboard.TargetProperty="Background.Color"/>
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</GroupBox>
</Grid>
</Grid>
</Border>
<ControlTemplate.Triggers>
<DataTrigger Binding="{Binding AdditionalContent.IsComponentShutdown, RelativeSource={RelativeSource TemplatedParent}}"
Value="False">
<Setter TargetName="imgStatus"
Property="Source"
Value="/Resources/GreenDot.png"/>
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
我正在尝试在ControlTemplate触发器中设置imgStatus的Source属性。 但是，图像没有变化。
答案 0 :(得分：0)
精细，奇怪的控制设计......
<DataTrigger Binding="{Binding Path=DataContext.IsConnected,
RelativeSource={RelativeSource AncestorType=ItemsControl}}" Value="True">
<Setter Property="Source"
TargetName="imgConnectedStatus"
Value="/Resources/GreenDot.png"/>
</DataTrigger>
因为您正在使用项目预先设置的DataTrigger，所以DataTemplates DataContext是ItemsSource中的一个对象，RelativeSource是包含控件的对象，它的路径是DataContext.Property
答案 1 :(得分：0)
很明显我不应该使用TemplatedParent。在绑定中设置{RelativeSource Self}解决了问题。
<ControlTemplate.Triggers>
<DataTrigger Binding="{Binding AdditionalContent.IsComponentShutdown, RelativeSource={RelativeSource Self}}"
Value="False">
<Setter TargetName="imgStatus"
Property="Source"
Value="/Resources/GreenDot.png"/>
</DataTrigger>
</ControlTemplate.Triggers>