How to highlight only one button out of 4 buttons - wpf

Question

I have 4 buttons on the screen. When i click one button i am loading Grid data on the same UI.
When I click 2nd button I am just clearing old data and binding new data for the corresponding grid.
I just want to highlight only one Button once i Clicked it.
I am using MVVM pattern so.. need to fix this issue only in XAML.
Example:
I clicked 1st button it will load data on the grid based on selection.
Now button 1 should be highlighted.
When I click on 2nd button. Button 1 should be in normal state and 2nd button should be highlighted.
Only one Button highlight should be in highlighted mode until we are on the view.

Answer 1

You should use WPF triggers. In your case it's IsPressed. Simple example:
<Trigger Property="IsPressed" Value="True">
<Setter Property="Background" Value="Red"/>
<Setter Property="BorderBrush" Value="1"/>
</Trigger>
Here is a complete example that works for me
<Window.Resources>
<Style x:Key = "TriggerStyle" TargetType="{x:Type Button}">
<Style.Triggers>
<Trigger Property = "IsPressed" Value = "True">
<Setter Property = "Background" Value = "Red" />
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<Button x:Name="button" Style = "{StaticResource TriggerStyle}" Content="Button" HorizontalAlignment="Left" Margin="103,45,0,0" VerticalAlignment="Top" Width="75"/>
<Button x:Name="button1" Style = "{StaticResource TriggerStyle}" Content="Button" HorizontalAlignment="Left" Margin="163,130,0,0" VerticalAlignment="Top" Width="75"/>
</Grid>
If it still doesn't work then maybe you should post your xaml.

Answer 2

I think you are looking for RadioButtons.
<Window.Resources>
<ControlTemplate x:Key="RbTemplateKey" TargetType="RadioButton">
<ToggleButton IsChecked="{Binding IsChecked, Mode=TwoWay,RelativeSource={RelativeSource AncestorType=RadioButton, Mode=FindAncestor}}"/>
</ControlTemplate>
</Window.Resources>
<Grid>
<StackPanel Margin="141,148,161,0" Orientation="Horizontal" Background="AliceBlue">
<RadioButton Width="25" Height="25" Margin="10" Template="{StaticResource RbTemplateKey}"/>
<RadioButton Width="25" Height="25" Margin="10" Template="{StaticResource RbTemplateKey}"/>
<RadioButton Width="25" Height="25" Margin="10" Template="{StaticResource RbTemplateKey}"/>
<RadioButton Width="25" Height="25" Margin="10" Template="{StaticResource RbTemplateKey}"/>
</StackPanel>
</Grid>