Question

我们正在使用MVC Structure并拥有多个c＃控制器，是否有可能通过web.config捕获它们？而不是向所有控制器方法添加一个catch语句？

非常感谢你。

Answer 1

您可以创建自己的基本控制器并处理OnException事件中的例外。

public class BaseController : Controller
{
    protected override void OnException(ExceptionContext filterContext)
    {
       // to do : Log the exception (filterContext.Exception)
       // and redirect / return error view
        filterContext.ExceptionHandled = true;
        // If the exception occurred in an ajax call. Send a json response back
        // (you need to parse this and display to user as needed at client side)
        if (filterContext.HttpContext.Request.Headers["X-Requested-With"]
                                                          =="XMLHttpRequest")
        {
            filterContext.Result = new JsonResult
            {
                JsonRequestBehavior = JsonRequestBehavior.AllowGet,
                Data = new { Error = true, Message = filterContext.Exception.Message }
            };
            filterContext.HttpContext.Response.StatusCode = 500; // Set as needed
        }
        else
        {
            filterContext.Result = new ViewResult { ViewName = "Error.cshtml" }; 
            //Assuming the view exists in the "~/Views/Shared" folder
        }
    }
}

对于非ajax请求，它会将Error.cshtml呈现给用户。如果您要对Error操作方法进行重定向（新的GET调用）而不是显示Error.cshtml，则可以将ViewResult替换为RedirectToRouteResult。

filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary {
                                               {"controller", "Home"}, {"action", "Error"}
                                              };

现在让你的其他控制器继承这个

public class HomeController : BaseController 
{
   public ActionResult Die()
   {
      throw new Exception("Bad code!");
   }
}
public class ProductsController : BaseController 
{
   public ActionResult Index()
   {
       var arr =new int[2];
       var thisShouldCrash = arr[10];
       return View();
   }
}

如何从所有控制器中捕获Web配置中的所有异常c＃

1 个答案: