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Enable ComboBox when specifis value selected in ListBox in XAML only [duplicate]

I have the following xaml:
<DockPanel>
<DockPanel>
<CheckBox IsChecked="{Binding Path=Test}" />
<CheckBox IsChecked="{Binding Path=Test}" />
</DockPanel>
<DockPanel DockPanel.Dock="Left" Width="10" Background="Blue">
<DockPanel.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding Path=Test}" Value="True">
<Setter Property="DockPanel.Background" Value="Yellow" />
</DataTrigger>
</Style.Triggers>
</Style>
</DockPanel.Style>
</DockPanel>
</DockPanel>
Now - the 2 checkboxes link properly - checking one will check the other - but the datatrigger is not firing at all.
What am I doing wrong?

The issue here is Property Value Precedence.
You are currently setting the Background to blue directly on the DockPanel. This explicit property will override any value set by the trigger.
Instead, you must set the original "Background" as a setter in the style.
<DockPanel DockPanel.Dock="Left" Width="10">
<DockPanel.Style>
<Style>
<Setter Property="DockPanel.Background" Value="Blue" />
<Style.Triggers>
<DataTrigger Binding="{Binding Path=Test}" Value="True">
<Setter Property="DockPanel.Background" Value="Yellow" />
</DataTrigger>
</Style.Triggers>
</Style>
</DockPanel.Style>
</DockPanel></DockPanel>

How to change background of the template item, on selecting DataGridCell

I need to change the background color of a Textbox that is inside DataGridTemplateColumn cell based on whether or not if the data cell is selected.
Currently what I managed to do is, changing the background color of the template cell, which became useless because of error management.
Thus, I want to change the background of the Textbox, and revert it back on selection changed.
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridRow}">
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="DarkBlue"/>
<Setter Property="Foreground" Value="Black"/>
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTemplateColumn IsReadOnly="True" MinWidth="150" Width="*">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox Text="{Binding Path=TwoDLineName, Mode=TwoWay,UpdateSourceTrigger=LostFocus, ValidatesOnDataErrors=True, NotifyOnValidationError=True}"
HorizontalAlignment="Stretch" Style="{StaticResource TextBoxValidated}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

You could use a Style with a DataTrigger that binds to the IsSelected property of the parent row:
<DataGridTemplateColumn IsReadOnly="True" MinWidth="150" Width="*">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox Text="{Binding Path=TwoDLineName, Mode=TwoWay,UpdateSourceTrigger=LostFocus, ValidatesOnDataErrors=True, NotifyOnValidationError=True}">
<TextBox.Style>
<Style TargetType="TextBox" BasedOn="{StaticResource TextBoxValidated}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsSelected,
RelativeSource={RelativeSource AncestorType=DataGridRow}}"
Value="True">
<Setter Property="Background" Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

Why is this WPF Button background not changing behind an image?

My squares are either SaddleBrown or WhiteSmoke in color, shifting to DarkTurquoise when selected. This works when there is no image on top of the squares. When I have a (PNG) image on top of the square the original SaddleBrown/WhiteSmoke color shows behind it but when the color is supposed to change to DarkTurquoise nothing happens to the background color of the square.
What could be the problem?
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button x:Name="Square"
Command="{Binding DataContext.BoardGUI.SquareClickCommand, RelativeSource={RelativeSource AncestorType=ItemsControl}}"
CommandParameter="{Binding}">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid Background="{TemplateBinding Background}">
<Image Source="{Binding Source, Converter={StaticResource NullImageConverter}}"/>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding SquareColor}" Value="Dark">
<Setter TargetName="Square" Property="Background" Value="SaddleBrown"/>
</DataTrigger>
<DataTrigger Binding="{Binding SquareColor}" Value="White">
<Setter TargetName="Square" Property="Background" Value="WhiteSmoke"/>
</DataTrigger>
<DataTrigger Binding="{Binding IsSelected}" Value="True">
<Setter TargetName="Square" Property="Background" Value="DarkTurquoise"/>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</ItemsControl.ItemTemplate>

As determined in the comments, based on the screenshot and the definition of the triggers, it appears that "SquareColor" is likely getting set or changed after IsSelected is set.

DataTrigger for IconTemplate in RadWindow

I have a WPF application and I use Telerik.
I'm trying to set the Icon Template so that it has a default value and only on a certain condition will it bind the image source:
<telerik:RadWindow.Resources>
<Style x:Key="CustomIconStyle" TargetType="Image">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsConditionMet, ElementName=MyWindow, UpdateSourceTrigger=PropertyChanged}" Value="True">
<Setter Property="Source" Value="{Binding Path=IconImageSource, ElementName=MyWindow, UpdateSourceTrigger=PropertyChanged}"/>
</DataTrigger>
</Style.Triggers>
</Style>
</telerik:RadWindow.Resources>
<telerik:RadWindow.IconTemplate>
<DataTemplate>
<Image Style="{StaticResource CustomIconStyle}" Source="/MyAssembly;Component/Resources/myIcon.ico" Height="16" Margin="0,0,5,0"/>
</DataTemplate>
</telerik:RadWindow.IconTemplate>
For some reason it always show the default icon.
I would also like to mention that I did implement the property changed - and I copied the same style just to a control inside the window and not in the template and it worked - so the problem isn't with the property changed
Any ideas?

You can use Triggers like that :
<telerik:RadWindow.Resources>
<Style TargetType="Image" x:Key="Style1">
<Setter Property="Source" Value="default.ico"/>
<Style.Triggers>
<DataTrigger Binding="{Binding MyCondition}" Value="true">
<Setter Property="Source" Value="custom.ico"/>
</DataTrigger>
</Style.Triggers>
</Style>
</telerik:RadWindow.Resources>
<telerik:RadWindow.IconTemplate>
<DataTemplate>
<Image Style="{StaticResource Style1}" Height="16" Margin="0,0,5,0"/>
</DataTemplate>
</telerik:RadWindow.IconTemplate>

So the problem was that once the RadWindow was loaded it didn't change the Icon.
The solution:
<telerik:RadWindow.IconTemplate>
<DataTemplate>
<Image Height="16" Margin="0,0,5,0">
<Image.Style>
<Style TargetType="{x:Type Image}">
<Setter Property="Source" Value="/MyAssembly;Component/Resources/myIcon.ico" />
<Style.Triggers>
<DataTrigger Value="True" Binding="{Binding Path=IsConditionMet, ElementName=MyWindow}">
<Setter Property="Source" Value="{Binding Path=IconImageSource, ElementName=MyWindow}"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</DataTemplate>
</telerik:RadWindow.IconTemplate>
But the trick is to give the correct value of IsConditionMet in the windows constructor before the load.
Thanks for the help everyone.

How to Bind an another Control on the Setter Value Property by using a Trigger?

i've a little Problem with the Databinding in WPF an hope you can help me.
I want to bind the SelectedDate Parameter of a DatePicker on a TextBlock, but only when a CheckBox is checked. The CheckBox and the TextBlock are in a DataView, the DatePicker is outside.
In the Moment i try to use it with a Trigger an set the Binding in the Value-Property in the Setter Part.
<TextBlock Text="">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsChecked}" Value="True">
<Setter Property="Text" Value="{Binding ElementName=StandartPitBis, Path=SelectedDate, StringFormat='dd.MM.yyyy'}" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
But this will not works. Has anywone a Tipp what i can do?
Here is the Code-Parts there i'm using:
Inside the GridView
The CheckBox
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<CheckBox Content="" x:Name="check_Anlage" IsChecked="{Binding Path=IsChecked}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
The TextBlock
<TextBlock Text="">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsChecked}" Value="True">
<Setter Property="Text" Value="{Binding ElementName=StandartPitBis, Path=SelectedDate, StringFormat='dd.MM.yyyy'}" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
Outside the GridView
The DatePicker
<DatePicker Grid.Column="1" Margin="0,5,0,5" SelectedDate="{x:Static sys:DateTime.Now}" x:Name="StandartPitVon" />
What i want to make is, that the SelectedDate from the DatePicker is shown in the TextBlock, but only when the CheckBox is Checked.
Thanks a lot

So. I've found the Problem. The Problem is, when a Property is set in the Object self, then it can't be overridet. When you need a Default-Value and a Trigger, then you must define the Default-Value in the Style too.
Example:
<TextBlock>
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Text" Value="{x:Null}" />
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsChecked}" Value="True">
<Setter Property="Text" Value="{Binding ElementName=StandartPitVon, Path=SelectedDate, StringFormat='dd.MM.yyyy'}" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>