问题
In my infrastructure i publish a event
this.eventAggregator.GetEvent<ReportAddedEvent>().Publish(report);
the report is a object
In my controller i subscribe to this event
this.eventAggregator.GetEvent<ReportAddedEvent>().Subscribe(this.OnReportAdded);
My problem is that the event fires twice. There is no other place in the entire code where the event is published so im certain that the event is not fired somewhere else and i can see it only fires once.
Anyone have a suggestion or have a solution to problem or knows where the problem lies.
回答1:
I think the problem is that the code
this.eventAggregator.GetEvent<ReportAddedEvent>().Subscribe(this.OnReportAdded);
to subscribe to the ReportAddedEvent is executed two times.
You should check (by using a debugger and a breakpoint on the line) if it executes more than once.
来源：https://stackoverflow.com/questions/9276494/prism-compositepresentationevent-fires-twice