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MVC下的全局异常过滤器注册方式如下：标红为asp.net mvc ,asp.net mvc api  注册全局异常过滤器的不同之处

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

namespace SuperMan
{
    public class FilterConfig
    {
        /// <summary>
        /// 注册全局过滤器 add by caoheyang 20150205
        /// </summary>
        /// <param name="filters"></param>
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new WebHandleErrorAttribute(), 1);
            filters.Add(new HandleErrorAttribute(), 2);
        }
    }


    /// <summary>
    /// 自定义异常处理类  add by caoheyang 20150205
    /// </summary>
    public class WebHandleErrorAttribute : HandleErrorAttribute
    {
        /// <summary>
        /// 重写异常处理方法 add by caoheyang 20150205   需要将该特性标注于各个controller上。
        /// </summary>
        /// <param name="filterContext">上下文对象  该类继承于ControllerContext</param>
        public override void OnException(ExceptionContext filterContext)
        {
            LogHelper.LogWriterFromFilter(filterContext.Exception);
        }
    }
}

MVC API下的注册方式如下：
在WebApiConfig.cs文件下加入标红代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Web.Http;
using Microsoft.Owin.Security.OAuth;
using Newtonsoft.Json.Serialization;

namespace SuperManWebApi
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API 配置和服务
            // 将 Web API 配置为仅使用不记名令牌身份验证。
            config.SuppressDefaultHostAuthentication();
            config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));
      config.Filters.Add(new ApiHandleErrorAttribute());  //注册全局异常过滤器 add by caoheyang 20150206     不需要将该特性标注于各个controller上
            // Web API 路由
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",                
                routeTemplate: "{controller}/{action}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }
    }
}

 /// <summary>
    /// 自定义异常处理类  add by caoheyang 20150205   不需要将该特性标注于各个controller上。 /// </summary>
    public class ApiHandleErrorAttribute : ExceptionFilterAttribute
    {
        /// <summary>
        /// 重写异常处理方法 add by caoheyang 20150205
        /// </summary>
        /// <param name="filterContext">上下文对象</param>
        public override void OnException(HttpActionExecutedContext filterContext)
        {
            LogHelper.LogWriterFromFilter(filterContext.Exception);
        }
     }

另外附LogHelper源码:

public class LogHelper
    {
       public static Logger logger = LogManager.GetLogger("SuperManCore.LogHelper");
  
       /// <summary>
       /// 备注日志
       /// </summary>
       /// <param name="dec">需要捕获的参数（必须为属性类）</param>
       /// <param name="rmark">描述操作</param>
       public new static void LogWriter(string rmark="",object dec=null)
       {
           try
           {
               string logstr = "\r\n-----------------start----------------------\r\n";
               MethodBase m = new StackTrace().GetFrame(1).GetMethod();
               ParameterInfo[] pm = m.GetParameters();
               string classname = m.DeclaringType.ToString();
               string propertyName = m.Name;
               logstr = logstr + "备注:" + rmark + "\r\n";
               //写类名
               logstr = logstr + "函数类名:" + classname + "\r\n";
               //写函数方法
               logstr = logstr + "函数名称为:" + propertyName + "\r\n";
               for (int i = 0; i < pm.Length; i++)
               {
                   logstr = logstr + "函数的参数有:" + pm.Name.ToString() + "\r\n";
               }
               JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
               logstr = logstr + "函数参数值:" + jsonSerializer.Serialize(dec) + "\r\n";
               logstr += "--------------------end---------------------\r\n";
               //写日志
               logger.Info(logstr);
           }
           catch (Exception)
           {

               throw;
           }

       }  

       /// <summary>
       /// 异常捕获日志
       /// </summary>
       /// <param name="ex">异常对象（必须为属性类）</param>
       /// <param name="rmark">操作简要描述</param>
       public new static void LogWriter(Exception ex, string rmark="")
       {
           try
           {
               string logstr = "\r\n-----------------start----------------------\r\n";
               MethodBase m = new StackTrace().GetFrame(1).GetMethod();
               ParameterInfo[] pm = m.GetParameters();
               string classname = m.DeclaringType.ToString();
               string propertyName = m.Name;
               logstr = logstr + "备注:" + rmark + "\r\n";
               //写类名
               logstr = logstr + "函数类名:" + classname + "\r\n";
               //写函数方法
               logstr = logstr + "函数名称为:" + propertyName + "\r\n";
               for (int i = 0; i < pm.Length; i++)
               {
                   logstr = logstr + "函数的参数有:" + pm.Name.ToString() + "\r\n";
               }
               logstr = logstr + "函数异常:" + ex.ToString() + "\r\n";
               logstr += "--------------------end---------------------\r\n";
               //写日志
               logger.Info(logstr);
           }
           catch (Exception)
           {
               throw;
           }

       }
       /// <summary>
       /// 带参数 异常的日志
       /// </summary>
       /// <param name="dec">异常参数对象（必须为属性类）</param>
       /// <param name="ex">日志异常对象</param>
       public new static void LogWriter(object dec, Exception ex)
       {
           try
           {
               string logstr = "\r\n-----------------start----------------------\r\n";
               MethodBase m = new StackTrace().GetFrame(1).GetMethod();
               ParameterInfo[] pm = m.GetParameters();
               string classname = m.DeclaringType.ToString();
               string propertyName = m.Name;
               //写类名
               logstr = logstr + "函数类名:" + classname + "\r\n";
               //写函数方法
               logstr = logstr + "函数名称为:" + propertyName + "\r\n";
               for (int i = 0; i < pm.Length; i++)
               {
                   logstr = logstr + "函数的参数有:" + pm.Name.ToString() + "\r\n";
               }
               JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
               logstr = logstr + "函数参数值:" + jsonSerializer.Serialize(dec) + "\r\n";
               logstr = logstr + "函数异常:" + ex.ToString() + "\r\n";
               logstr += "--------------------end---------------------\r\n";
               //写日志
               logger.Info(logstr);
           }
           catch (Exception)
           {
               throw;
           }

       }
       /// <summary>
       /// 带参数 描述 异常日志捕获
       /// </summary>
       /// <param name="dec">所要捕获的参数（必须为属性类）</param>
       /// <param name="ex">异常对象</param>
       /// <param name="rmark">描述</param>
       public new static void LogWriter(object dec, Exception ex, string rmark)
       {
           try
           {
               string logstr = "\r\n-----------------start----------------------\r\n";
               MethodBase m = new StackTrace().GetFrame(1).GetMethod();
               ParameterInfo[] pm = m.GetParameters();
               string classname = m.DeclaringType.ToString();
               string propertyName = m.Name;
               //写备注
               logstr = logstr + "备注:" + rmark + "\r\n";
               //写类名
               logstr = logstr + "函数类名:" + classname + "\r\n";
               //写函数方法
               logstr = logstr + "函数名称为:" + propertyName + "\r\n";
               for (int i = 0; i < pm.Length; i++)
               {
                   logstr = logstr + "函数的参数有:" + pm.Name.ToString() + "\r\n";
               }
               JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
               logstr = logstr + "函数参数值:" + jsonSerializer.Serialize(dec) + "\r\n";
               logstr = logstr + "函数异常:" + ex.ToString() + "\r\n";
               logstr += "--------------------end---------------------\r\n";
               //写日志
               logger.Info(logstr);
           }
           catch (Exception)
           {
               throw;
           }
       }
       /// <summary>
       /// 捕获全局异常
       /// </summary>
       /// <param name="error"></param>
       public new static void LogWriterFromFilter(Exception error)
       {
           try
           {
               string logstr = "\r\n-----------------start----------------------\r\n"; 
               //异常发生地址
               logstr = logstr + "异常发生地址:" + HttpContext.Current.Request.Url.AbsoluteUri.ToString() + "\r\n";
               logstr = logstr + "请求类型:" + HttpContext.Current.Request.RequestType.ToString() + "\r\n";
               
               logstr = logstr + "异常:" + error.ToString() + "\r\n";
                
               logstr += "--------------------end---------------------\r\n";
               //发送邮件
               if (ConfigSettings.Instance.IsSendMail == "true")
               {
                   string emailToAddress = ConfigSettings.Instance.EmailToAdress;
                   EmailHelper.SendEmailTo(logstr, emailToAddress);
               }              
               //写日志
               logger.Info(logstr);
           }
           catch (Exception)
           {
               throw;
           } 
       }
    }

注：LogHelper所在类库需要引用NLog.dll文件。