如何在ASP.Net Core 2中获取应用于ExceptionFilterAttribute的Controller实例?
现在在Core中,是否有更好的方式来实现共享“基本”控制器属性和方法等,比如将其放在更高的级别,如Startup中?
在Core之前,在MVC 4中,我会这样做:
/// <summary>
/// Base controller, shared by all WebAPI controllers for tracking and shared properties.
/// </summary>
[ApiTracking]
[ApiException]
public class BaseApiController : ApiController
{
private Common.Models.Tracking _Tracking = null;
public Common.Models.Tracking Tracking
{
get
{
if(_Tracking == null)
_Tracking = new Common.Models.Tracking();
return _Tracking;
}
}
//... other shared properties...
}
/// <summary>
/// Error handler for webapi calls. Adds tracking to base controller.
/// </summary>
public class ApiExceptionAttribute : ExceptionFilterAttribute
{
public override void OnException(HttpActionExecutedContext cntxt)
{
BaseApiController ctrl = cntxt.ActionContext.ControllerContext.Controller as BaseApiController;
if (ctrl != null)
ctrl.Tracking.Exception(cntxt.Exception, true);
base.OnException(actionExecutedContext);
}
}
/// <summary>
/// Intercepts all requests to inject tracking detail and call tracking.save.
/// </summary>
public class ApiTrackingAttribute : System.Web.Http.Filters.ActionFilterAttribute
{
public override void OnActionExecuting(HttpActionContext cntxt)
{
//...add info to tracking
}
public override void OnActionExecuted(HttpActionExecutedContext cntxt)
{
BaseApiController ctrl = cntxt.ActionContext.ControllerContext.Controller as BaseApiController;
if (ctrl != null)
ctrl.Tracking.Save();
}
}