using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace 分布式日志
{
    public class MyExceptionFilter : HandleErrorAttribute
    {
        public static Queue<Exception> listQueue = new Queue<Exception>();
        public override void OnException(ExceptionContext filterContext)
        {
            if (filterContext.Exception!=null)
            {
                listQueue.Enqueue(filterContext.Exception);
                filterContext.HttpContext.Response.Redirect("/error.html");
            }
            base.OnException(filterContext);
        }
    }
}

using System.Web;
using System.Web.Mvc;

namespace 分布式日志
{
    public class FilterConfig
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            //filters.Add(new HandleErrorAttribute());
            filters.Add(new MyExceptionFilter());
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace 分布式日志
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            //通过线程池开启一个线程，然后不停的从队列中读取数据
            string strRoot = Server.MapPath("/Log/");
            string strPath = strRoot + DateTime.Now.ToString("yyyy-MM-dd").ToString()+".txt";
            ThreadPool.QueueUserWorkItem(i =>
            {
                while (true)
                {
                    try
                    {
                        if (MyExceptionFilter.listQueue.Count > 0)
                        {
                            Exception ex = MyExceptionFilter.listQueue.Dequeue();
                            if (ex != null)
                            {
                                System.IO.File.AppendAllText( strPath,DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + ex.ToString() + Environment.NewLine,System.Text.Encoding.UTF8);
                            }
                            else
                            {
                                Thread.Sleep(30);
                            }
                        }
                        else
                        {
                            Thread.Sleep(30);//避免cpu空转
                        }
                    }
                    catch(Exception ex)
                    {
                        MyExceptionFilter.listQueue.Enqueue(ex);
                    }
                }
            }, strPath);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace 分布式日志.Controllers
{
    public class TestController : Controller
    {
        //
        // GET: /Test/
        public ActionResult Index()
        {
            int aa = Convert.ToInt32("sss");
            return View();
        }
    }
}