asp.net mvc - MVC 4 Notification Messages to the User -

i'm using controller - service - repository layer pattern i'm application. repository holds basic crud operations , service layer business logic while controllers kept lean (they call service layer functions).

i want send messages (success, warning, etc.) user i'm unsure how service layer level? i've looked solutions using tempdata , base class seem work on controller level.

is there solution push user notifications view service layer?

looks have separation of concerns in app architecture. wise keep way - not make service layer know ui.

what would create class service layer return execution result.

public class executionresult<t> {     public t result { get; set; }     public string message { get; set; } } 

this way pass message viewbag.usernotification , shouw in view:

edit: sample usage:

public class math {     public executionresult<double> divide(double number, double divideby)     {         if (divideby == 0)         {             return new executionresult<double>                 {                     result = double.nan,                     message = "division 0 not possible"                 };         }          return new executionresult<double>             {                 result = number/divideby             };     } } 

this sample. in real world take different approach in comparing values of type double