how to inject a logger instance using MEF?

Question

Hi,

Is it possible to inject an instance of logger class object using Managed Extensibility Framework. Please show a sample code snippet.

Thanks in advance

Answer 1

Yes, using Constructor Injection:

private readonly ILogger logger;

[ImportingConstructor]
public MyClass(ILogger logger)
{
    this.logger = logger;
}

Obviously (if you know MEF) some other type must Export ILogger...

Alternatively, you can also use Property Injection, although I find the semantics vague:

[Import(typeof(ILogger))]
public ILogger Logger { get; set; }