DataTrigger not working on CheckBox - wpf

Question

I have the following DataTrigger in a WPF form:
<CheckBox IsChecked="{Binding ConcentratorViewModel.Integrated}">
<CheckBox.Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Margin" Value="0,10,0,0"/>
<Setter Property="Width" Value="20"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<!--<Setter Property="IsEnabled" Value="False"/>-->
<!--<Setter Property="IsChecked" Value="False"/>-->
<Style.Triggers>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}" Value="ZIV">
<Setter Property="Background" Value="Red"/>
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}" Value="Landis+Gyr">
<Setter Property="IsChecked" Value="False"/>
</DataTrigger>
</Style.Triggers>
</Style>
</CheckBox.Style>
</CheckBox>
The CheckBox must be Checked or Unchecked depending on the selected manufacturer. I added a converter to see the value on the trigger and it's correct. I've also added the Background property and it changes correctly, but the IsChecked doesn't work.

Answer 1

Well you need to move the IsChecked Binding inside the Style. Setting it directly on the Checkbox gives it precedence and the Trigger's cannot change that value.
So something like:
<CheckBox>
<CheckBox.Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Margin"
Value="0,10,0,0" />
<Setter Property="Width"
Value="20" />
<Setter Property="VerticalAlignment"
Value="Center" />
<Setter Property="IsChecked"
Value="{Binding ConcentratorViewModel.Integrated}" />
<Style.Triggers>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}"
Value="ZIV">
<Setter Property="Background"
Value="Red" />
<Setter Property="IsChecked"
Value="True" />
</DataTrigger>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}"
Value="Landis+Gyr">
<Setter Property="IsChecked"
Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</CheckBox.Style>
</CheckBox>
Note:
Remember by doing this, your Binding only applies when the DataTrigger's do not evaluate to "True". Thus if your Manufacturer property is "ZIV" or "Landis+Gyr" then your Integrated property is not going to see any CheckBox updates even with a TwoWay binding as it just isn't being used.