在调用操作之前发生的ASP.NET MVC事件?

你可以写一个习惯 action filter attribute

public class CustomFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        // This method is executed before calling the action
        // and here you have access to the route data:
        var foo = filterContext.RouteData.Values["foo"];
        // TODO: use the foo route value to perform some action

        base.OnActionExecuting(filterContext);
    }
}

然后你可以用这个自定义属性装饰你的基本控制器。这里有一个 blog post 说明这种滤波器的示例实现。

OnActionExecuting 方法。

如果要将筛选器添加到所有控制器,而不仅仅是选择控制器,则可以将其添加到“全局筛选器”。你这样做 Application_Start()

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();

    // Register global filter
    GlobalFilters.Filters.Add(new CustomFilterAttribute ()); // ADDED

    RegisterGlobalFilters(GlobalFilters.Filters);
    RegisterRoutes(RouteTable.Routes);
}