c# - 在 MVC3 中的每个 Action 之前运行一个方法

Question

在 MVC3 中，我们如何在运行每个 Action 之前运行一个方法？

我知道我们可以对 OnActionExecuting 使用以下方法:

public class ValidateUserSessionFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
      ...
    }
}

但是我们怎样才能在 ActionExecuting 之前运行一个方法呢？

Answer 1

您正在寻找 Controller.ExecuteCore() .

此函数在每个 Action 调用之前调用。您可以在 Controller 或基本 Controller 中覆盖它。基于来自 Nadeem Afana 的 cookie 设置文化基础的示例:

   public class BaseController : Controller
   {
      protected override void ExecuteCore()
      {
         string cultureName = null;
         // Attempt to read the culture cookie from Request
         HttpCookie cultureCookie = Request.Cookies["_culture"];
         if (cultureCookie != null)
         {
            cultureName = cultureCookie.Value;
         }
         else
         {
            if (Request.UserLanguages != null)
            {
               cultureName = Request.UserLanguages[0]; // obtain it from HTTP header AcceptLanguages
            }
            else 
            {
               cultureName = "en-US"; // Default value
            }
         }

         // Validate culture name
         cultureName = CultureHelper.GetImplementedCulture(cultureName); // This is safe


         // Modify current thread's cultures            
         Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo(cultureName);
         Thread.CurrentThread.CurrentUICulture = Thread.CurrentThread.CurrentCulture;

         base.ExecuteCore();
      }
   }