datatrigger

问题 I have the following XAML: <Style.Triggers> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding Path=Errors, Converter={StaticResource ErrorsCountConverter}}"> <Condition.Value>True</Condition.Value> </Condition> <Condition Binding="{Binding Path=Errors[0].HasError}" Value="True" /> </MultiDataTrigger.Conditions> <Setter Property="Background" Value="Red" /> </MultiDataTrigger> </Style.Triggers> Errors is a ObservableCollection<BrokenRule> . The BrokenRule has a

问题 I'm yet again a bit stumped, and was hoping someone could please help. Apologies in advance to the long code. Issue - I have a DataTrigger that starts off firing as expected, but it eventually fails and I can't work out why. In the example provided, it moves a rectangle around a Canvas. Each click of the button moves it in this sequence; N, NE, E, SE, S, SW, W, NW. Then it starts the sequence again, starting with N. Once the first sequence is completed, it won't move North. It will only ever

问题 what is wrong about the following code? I get this error during compilation: The property 'TargetName' does not represent a valid target for the 'Setter' because an element named 'cc' was not found. Make sure that the target is declared before any Setters, Triggers or Conditions that use it. How do I have to refactor my code so I can compile it without error? I just want to switch a datatemplate with DataTrigger bound to a value in my PersonViewModel! <ContentControl x:Name="cc" Grid.Column=

问题 I have a grid laid out like so; +---------+---------+ | Image | Details | | is | pane | | here | for data| | | entry | +---------+---------+ | ListView here to | | select data item | | for top two panes | +---------+---------+ This all works well, but I would now like to change the image to another set of controls saying 'Sorry, no image available' when the selected item in the listview does not have an image I've tried wrapping the image in a DockPanel and setting a DataTemplate there (so I

问题 I have a MVVM binding for Border background where in I read Color names from a file in String format and convert them to Brush using the code: Brush b1 = new SolidColorBrush((Color)ColorConverter.ConvertFromString("Red"); myItem.Background = b1; Background is a property defined in ViewModel as: public Brush Background { get { return _background; } set { this._background = value; RaisePropertyChanged("Background"); } } And it is accessed in XAML as: <Border Background="{Binding Background}">

问题 I am trying to update the color of textblock depending on it value. Seems simple however not working. Here's the textblock xaml. <TextBlock Grid.Column="1" Grid.Row="1" Text="{Binding Path=GL, StringFormat={}{0:N0}}" HorizontalAlignment="Left" FontFamily="Verdana" Foreground="Tomato" FontWeight="Bold" VerticalAlignment="Center" Margin="5,2,5,0" FontSize="18" > <TextBlock.Resources> <converters:ColorConverter x:Key="CoConverter"></converters:ColorConverter> </TextBlock.Resources> <TextBlock

问题 I have created an attached property to extend a Button class with additional state: <Button v:ExtensionHelper.OperationMode="{Binding MyObject.OperationMode}" Command="{Binding MyObject.Select}" Style="{StaticResource operationModeControlTemplateStyle}" /> Then I want to access this value in the ControlTemplate using DataTrigger like this: <Style x:Key="operationModeControlTemplateStyle" TargetType="Button"> <Setter Property="IsHitTestVisible" Value="true" /> <Setter Property="Template">

问题 How can I incorporate an auto-tab when the MaxLength property is reached into a XAML Trigger, DataTrigger, PropertyTrigger, Style.Trigger, etc. Below are two such options for how I have already accomplished this with a TextBox via code-behind. I'm looking to apply it in a XAML style as well. Thanks. XAML: <TextBox x:Name="MyTextBox" Text="{Binding Path=MyProperty}" Style="{StaticResource TextBoxStyle}" MaxLength="5" TextChanged="MyTextBox_TextChanged"> </TextBox> Code-Behind for WPF: private

问题 To translate my WPF application I use a Markup extension which returns a Binding object. This allows me to switch the language while the application is running. I use this Markup like this: <TextBlock Text="{t:Translate 'My String'}" />" I would like to change a Buttons text through a data Trigger: <Button> <Button.Style> <Style TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <!-- Custom control template, note the TextBlock formating --> <ControlTemplate TargetType="

问题 I have a Style for a Button. Depending on if the Button is enabled or not, I want to change the Background. This is what it looks like: <Style x:Key="MyButtonStyle" TargetType="Button"> <Style.Triggers> <DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=Button}, Path=IsEnabled, PresentationTraceSources.TraceLevel=High}" Value="False"> <Setter Property="Background" Value="Purple"/> </DataTrigger> <DataTrigger Binding="{Binding RelativeSource=