Custom Web API Filter with Log4net logging.

LogActionWebApiFilter.cs

public class LogActionWebApiFilter : ActionFilterAttribute
{
    /// <summary>
    /// Instance of the Log4Net log.
    /// </summary>
    [Dependency]  //Part 1
     public ILog Log { get; set; }
        
    //This function will execute before the web api controller
    //Part 2
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
            //This is where you will add any custom logging code
            //that will execute before your method runs.
      		Log.DebugFormat(string.Format("Request {0} {1}"
           	, actionContext.Request.Method.ToString()
                  , actionContext.Request.RequestUri.ToString());
    }

    //This function will execute after the web api controller
    //Part 3
     public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
     {
        //This is where you will add any custom logging code that will
        //execute after your method runs.
        Log.DebugFormat(string.Format("{0} Response Code: {1}"
               	, actionExecutedContext.Request.RequestUri.ToString()
                      , actionExecutedContext.Response.StatusCode.ToString());
     }
}