应用应用程序样式时WPF DataTrigger不会触发?

时间:2010-01-26 15:46:27

标签: wpf xaml styling datatrigger

对于这个问题的任何帮助都会非常感激,因为我一整天都在寻找这个地区的答案!

我通过向App.xaml添加合并字典,将全局样式应用于我的WPF应用程序。这已经在应用程序中应用了类似预期的样式,但是我已经完成了很多我无法完全理解的事情。

我可以给你一个风格正在应用的代码,如果这会有所帮助,但它非常大,所以尽管最好不要阻塞这篇文章。该样式将背景颜色应用于每个列表框项目,以及将鼠标悬停在动画和颜色更改上。这个样式不适用于我的应用程序中的几个列表框,但代码示例如下:

<StackPanel Margin="0,15,0,0" Width="auto" HorizontalAlignment="Left">
    <StackPanel.Resources>
        <converter:IntToBoolConverter x:Key="intToBoolConverter" />
        <converter:BoolToVisibilityConverter x:Key="boolToVisibilityConverter" />
    </StackPanel.Resources>
    <Label Content="Required Vehicles" HorizontalAlignment="Center" FontWeight="Bold" />
    <ListBox x:Name="lstVehicleRequests" ItemsSource="{Binding VehicleRequests}" Width="auto"
             IsSynchronizedWithCurrentItem="True">
        <ListBox.Resources>
            <Style TargetType="{x:Type ListBoxItem}" BasedOn="{StaticResource BaseListBoxItem}">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Path=RequestStatus.RequestStatusId}" Value="7">
                        <Setter Property="Background">
                            <Setter.Value>
                                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                    <GradientStop Color="#FFFFFFFB" Offset="0" />
                                    <GradientStop Color="IndianRed" Offset="0.5" />
                                    <GradientStop Color="#FFFFFFFB" Offset="1" />
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </ListBox.Resources>
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Grid ShowGridLines="True">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="auto" />
                        <ColumnDefinition Width="auto" />
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="auto" />
                        <RowDefinition Height="4" />
                    </Grid.RowDefinitions>
                    <StackPanel Margin="0,8,0,0">
                        <TextBlock Margin="0,4,10,0" >
                        <Label Content="Coach Type" Width="120" />
                        <ComboBox ItemsSource="{Binding DataContext.CoachTypes, 
                                  RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}"
                                  SelectedItem="{Binding CoachType}" DisplayMemberPath="Name" Width="100" />
                        </TextBlock>
                        <TextBlock Margin="0,8,10,0">
                            <Label Content="No of Passengers" Width="120" />
                            <TextBox 
                                    keys:ValidKeys.Numeric="True"
                                    Validation.ErrorTemplate="{StaticResource validationTemplate}"
                                    Style="{StaticResource textBoxInError}" Width="50">
                                <TextBox.Text>
                                        <Binding Path="Passengers"
                                                  UpdateSourceTrigger="PropertyChanged">
                                            <Binding.ValidationRules>
                                                <val:RegularExpressionRule 
                                                    ErrorDescription="Please Enter a Numeric Size" 
                                                    RegularExpression="^\d*$" />
                                            </Binding.ValidationRules>
                                        </Binding>
                                    </TextBox.Text>
                            </TextBox>
                        </TextBlock>
                        <TextBlock Margin="0,8,10,0">
                            <Label Content="No of Drivers" Width="120" />
                            <TextBox
                                    keys:ValidKeys.Numeric="True"
                                    Validation.ErrorTemplate="{StaticResource validationTemplate}"
                                    Style="{StaticResource textBoxInError}" Width="50">
                                <TextBox.Text>
                                    <Binding Path="Drivers"
                                        UpdateSourceTrigger="PropertyChanged">
                                        <Binding.ValidationRules>
                                            <val:RegularExpressionRule 
                                                ErrorDescription="Please Enter a Numeric Size" 
                                                RegularExpression="^\d*$" />
                                            </Binding.ValidationRules>
                                        </Binding>
                                    </TextBox.Text>
                            </TextBox>
                        </TextBlock>
                        <TextBlock Margin="0,8,10,0">
                        <Label Content="Positioning Feeder Drivers" Width="120" />
                            <TextBox
                                    keys:ValidKeys.Numeric="True"
                                    Style="{StaticResource textBoxInError}" Width="50" MaxLength="3">
                                <TextBox.Text>
                                    <Binding Path="PositioningFeederDrivers"
                                        UpdateSourceTrigger="PropertyChanged">
                                        <Binding.ValidationRules>
                                            <val:RegularExpressionRule 
                                                ErrorDescription="Please Enter a Numeric Size" 
                                                RegularExpression="^\d*$" />
                                            </Binding.ValidationRules>
                                        </Binding>
                                    </TextBox.Text>
                            </TextBox>
                        </TextBlock>
                        <TextBlock Margin="0,8,10,0">                    
                        <Label Content="Wheelchair Access" Width="120" />
                        <ComboBox Width="100" SelectedIndex="{Binding WheelchairAccess, 
                                  Converter={StaticResource intToBoolConverter}}">
                            <ComboBoxItem Content="Not Required" />
                            <ComboBoxItem Content="Required" />
                        </ComboBox>
                        </TextBlock>
                        <TextBlock Margin="0,8,10,8">
                        <Label Content="Trailer" Width="120" />
                        <ComboBox Width="100" SelectedIndex="{Binding Trailer, 
                                  Converter={StaticResource intToBoolConverter}}">
                            <ComboBoxItem Content="Not Required" />
                            <ComboBoxItem Content="Required" />
                        </ComboBox>
                        </TextBlock>
                    </StackPanel>
                </Grid>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</StackPanel>

然后我在上面添加了BasedOn属性,为什么我必须这样才能将样式应用到此列表框?其他列表框和不同的控件会自动选择它吗?

无论如何,你会看到我对这个列表框有一个数据触发器,它应该在请求状态id = 7时更改背景颜色。如果没有基于on属性,则行成功地将颜色更改为红色。应用样式时,它永远不会更改颜色,并始终应用模板中的橙色。

HELP ?????

非常感谢,

标记

1 个答案:

答案 0 :(得分:0)

<Style x:Key="BaseListBoxItem" d:IsControlPart="True" TargetType="{x:Type ListBoxItem}">
        <Setter Property="SnapsToDevicePixels" Value="true" />
        <Setter Property="OverridesDefaultStyle" Value="true" />
        <Setter Property="Padding" Value="3" />
        <Setter Property="Foreground" Value="{StaticResource OutsideFontColor}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ListBoxItem}">
                    <ControlTemplate.Resources>
                        <Storyboard x:Key="HoverOn">
                            <DoubleAnimation Duration="00:00:00.1000000" Storyboard.TargetName="BackgroundGradientOver" 
                                             Storyboard.TargetProperty="Opacity" To="0.73" />
                        </Storyboard>
                        <Storyboard x:Key="HoverOff">
                            <DoubleAnimation Duration="00:00:00.4000000" Storyboard.TargetName="BackgroundGradientOver" 
                                             Storyboard.TargetProperty="Opacity" To="0" />
                        </Storyboard>
                        <Storyboard x:Key="SelectedOn">
                            <DoubleAnimation Duration="00:00:00.1000000" Storyboard.TargetName="BackgroundGradientSelected" 
                                             Storyboard.TargetProperty="Opacity" To="0.84" />
                            <DoubleAnimation Duration="00:00:00.1000000" Storyboard.TargetName="BackgroundGradientSelectedDisabled" 
                                             Storyboard.TargetProperty="Opacity" To="0.55" />
                        </Storyboard>
                        <Storyboard x:Key="SelectedOff">
                            <DoubleAnimation Duration="00:00:00.4000000" Storyboard.TargetName="BackgroundGradientSelected" 
                                             Storyboard.TargetProperty="Opacity" To="0" />
                            <DoubleAnimation Duration="00:00:00.4000000" Storyboard.TargetName="BackgroundGradientSelectedDisabled" 
                                             Storyboard.TargetProperty="Opacity" To="0" />
                        </Storyboard>
                    </ControlTemplate.Resources>
                    <Grid SnapsToDevicePixels="true">
                        <Rectangle x:Name="BackgroundGradientOver" RadiusX="1" RadiusY="1" Stroke="{DynamicResource MouseOverBorderBrush}" 
                                   Opacity="0" Fill="{DynamicResource MouseOverBrush}"/>
                        <Rectangle x:Name="BackgroundGradientSelectedDisabled" RadiusX="1" RadiusY="1" Opacity="0" Fill="{DynamicResource 
                            ListItemSelectedBrush}" Stroke="{DynamicResource ListItemSelectedBorderBrush}"/>
                        <Rectangle x:Name="BackgroundGradientSelected" Stroke="{DynamicResource PressedBorderBrush}" StrokeThickness="1" 
                                   RadiusX="1" RadiusY="1" Opacity="0" Fill="{DynamicResource PressedBrush}">

                        </Rectangle>
                        <ContentPresenter x:Name="contentPresenter" Content="{TemplateBinding Content}" Margin="{TemplateBinding Padding}"
                                          ContentTemplate="{TemplateBinding ContentTemplate}" 
                                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"  />
                    </Grid>
                    <ControlTemplate.Triggers>

                        <Trigger Property="IsSelected" Value="true">
                            <Trigger.ExitActions>
                                <BeginStoryboard Storyboard="{StaticResource SelectedOff}" x:Name="SelectedOff_BeginStoryboard" />
                            </Trigger.ExitActions>
                            <Trigger.EnterActions>
                                <BeginStoryboard Storyboard="{StaticResource SelectedOn}" x:Name="SelectedOn_BeginStoryboard" />
                            </Trigger.EnterActions>

                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Trigger.ExitActions>
                                <BeginStoryboard Storyboard="{StaticResource HoverOff}" x:Name="HoverOff_BeginStoryboard" />
                            </Trigger.ExitActions>
                            <Trigger.EnterActions>
                                <BeginStoryboard Storyboard="{StaticResource HoverOn}" />
                            </Trigger.EnterActions>
                        </Trigger>

                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource DisabledForegroundBrush}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>