datatrigger on enum to change image

You need 2 things to get this working:

1 - Add an xmlns reference in the root element of your XAML file, to the namespace where your Enum is defined:

<UserControl ...xmlns:my="clr-namespace:YourEnumNamespace;assembly=YourAssembly"> 

2 - in the Value property of the DataTrigger, use the {x:Static} form:

 <DataTrigger Binding="{Binding Path=LapCounterPingStatus}" Value="{x:Static my:PingStatus.PING_UNKNOWN}">

Notice that the Enum type must be prefixed with the xmlns prefix you defined above.

Edit:

If your Enum is declared inside a class you need to use the syntax:

{x:Static namespace:ClassName+EnumName.EnumValue}

for example:

{x:Static my:ConfigurationViewModel+PingStatus.PING_UNKNOWN}

Complete worked example for WPF + MVVM.

Tested on MSVC 2017.

In the view:

<TextBlock Text="Some text to be colored by an enum">    <TextBlock.Style>        <Style TargetType="{x:Type TextBlock}">            <Style.Triggers>                <DataTrigger Binding="{Binding StatusIcon}" Value="{x:Static my:StatusIcon.Warning}">                    <Setter Property="Foreground" Value="Yellow"/>                </DataTrigger>                <DataTrigger Binding="{Binding StatusIcon}" Value="{x:Static my:StatusIcon.Error}">                    <Setter Property="Foreground" Value="Red}"/>                </DataTrigger>            </Style.Triggers>        </Style>    </TextBlock.Style></TextBlock>

If using ReSharper, and if the DataContext is set up properly, there will be intellisense when you hit the . after StatusIcon, i.e. it will show the properties of the enum which are Debug, Info, Warning or Error.

If using ReSharper, it will suggest the following update to the namespace in the header for the XAML file(its good like that):

xmlns:my="clr-namespace:Class.Path.MyViewModel;assembly=MyAssembly"

And the VieModel:

public enum StatusIcon{    Debug,    Info,    Warning,    Error}public class MyViewModel{    public StatusIcon StatusIcon { get; }}

We also use Fody for automated binding.

You can simply set enum value as DataTrigger Value... Tested on MSVC 2017.

<TextBlock Text="Some text to be colored by an enum">    <TextBlock.Style>        <Style TargetType="{x:Type TextBlock}">            <Style.Triggers>                <DataTrigger Binding="{Binding StatusIcon}" Value="Warning">                    <Setter Property="Foreground" Value="Yellow"/>                </DataTrigger>                <DataTrigger Binding="{Binding StatusIcon}" Value="Error">                    <Setter Property="Foreground" Value="Red}"/>                </DataTrigger>            </Style.Triggers>        </Style>    </TextBlock.Style></TextBlock>