.Net Core OnActionExecutionAsync

以往ASP.Net MVC，要在Controller进入Action前、后记录log或是处理权限判断，只要override OnActionExecuting及OnActionExecuted即可，如下：

public override void OnActionExecuting(ActionExecutingContext context){//log request database.OnActionExecuting(context);}

public override void OnActionExecuted(ActionExecutedContext context){//log resposne data            base.OnActionExecuted(context);}

同样方法在.Net Core专案仍可以执行，但.Net Core Method多以非同步方式处理，此时就需使用OnActionExecutionAsync，做法很简单，Action前->await next()->Action后，如下：

public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next){//get session or check something...            //excute async method            //before action_logger.WriteLog(Level.Info, _logType, $"before action");await next();//after action            _logger.WriteLog(Level.Info, _logType, $"after action");}

https://learn.microsoft.com/en-us/aspnet/core/mvc/controllers/filters?view=aspnetcore-7.0#implementation