WiX: Install component based on ComboBox selection - combobox

Question

I'm trying to create an installer which installs some components based on the selection of a Combobox but it seems like the condition isn't working. I declared the Combobox as the following:
...
<UI>
<ComboBox Property="Option">
<ListItem Text="Red" Value="red" />
<ListItem Text="Blue" Value="blue" />
<ListItem Text="Green" Value="green" />
</ComboBox>
...
I have one Feature:
<Feature Id="ProductFeature" Title="MyProgram" Level="1">
<ComponentGroupRef Id="ProductComponents" />
</Feature>
And the component Group is declared as the following:
<ComponentGroup Id="ProductComponents" Directory="INSTALLFOLDER">
<Component Id="MainComponent">
<File Id="exe" Name="Main.exe" Source="Main.exe" />
</Component>
<Component Id="ComponentRed">
<Condition>Option=red</Condition>
<File Id="R" Name="config.txt" Source="red.txt" />
</Component>
<Component Id="ComponentBlue">
<File Id="B" Name="config.txt" Source="blue.txt" />
<Condition>Option=blue</Condition>
</Component>
<Component Id="ComponentGreen">
<File Id="G" Name="config.txt" Source="green.txt" />
<Condition>Option=green</Condition>
</Component>
</ComponentGroup>

Answer 1

The property needs to be public (upper-case) and the comparison needs to be done inside a CDATA. You could use the case-insensitive comparison ~=.
<Component Id="ComponentRed" Guid="*" Directory="INSTALLFOLDER">
<File Id="R" Name="red.txt" Source="red.txt" />
<Condition>
<![CDATA[OPTION~="Red"]]>
</Condition>
</Component>
<Control Id="MyComboBox" Type="ComboBox" X="20" Y="140" Width="56" Height="17"
Property="OPTION">
<ComboBox Property="OPTION">
<ListItem Text="Red" Value="Red" />
<ListItem Text="Blue" Value="Blue" />
<ListItem Text="Green" Value="Green" />
</ComboBox>
</Control>