访问WPF datatemplates中的系统枚举

Question

I'm trying to add a data trigger for a property called 'Status' in my own class of type ServiceControllerStatus (an enum found in System.ServiceProcess).

I added this to the XAML:

xmlns:System="clr-namespace:System.ServiceProcess;assembly=System.ServiceProcess.dll"

And am trying to use data triggers based on the value of 'Status' by doing this:

<DataTrigger Binding="{Binding Path=Status}" >
    <DataTrigger.Value>                             
        <System:ServiceControllerStatus>Running</System:ServiceControllerStatus>
    </DataTrigger.Value>
    <Setter TargetName="border" Property="BorderBrush" Value="Green"/>
</DataTrigger>

But am receiving an error "The tag 'ServiceControllerStatus' does not exist in XML namespace 'clr-namespace:System.ServiceProcess;assembly=System.ServiceProcess.dll"

Is it possible to use enums defined in system namespaces, or must you only reference enums defined in your own classes?

Thank you!

Answer 1

You can use enum with the {x:Static} form.

<DataTrigger Binding="{Binding Path=Status}" 
             Value="{x:Static System:ServiceControllerStatus.Running}">
    <Setter TargetName="border" Property="BorderBrush" Value="Green"/>
</DataTrigger>

UPDATE:

don't use .dll extension string in assembly statement.

assembly=System.ServiceProcess.dll -> assembly=System.ServiceProcess

xmlns:System="clr-namespace:System.ServiceProcess;assembly=System.ServiceProcess"

PS: I'm not good at English.