在项目中引用log4net.dll

1、在Models文件夹内，定义一个WebApiMonitorLog ，监控日志对象

/// 
    /// 监控日志对象    /// 
    public class WebApiMonitorLog    {        public string ControllerName { get; set; }        public string ActionName { get; set; }        public DateTime ExecuteStartTime { get; set; }        public DateTime ExecuteEndTime { get; set; }        /// 
        /// 请求的Action 参数        /// 
        public Dictionary
     
       ActionParams { get; set; }        /// 
      
        /// Http请求头        /// 
        public string HttpRequestHeaders { get; set; }        /// 
      
        /// 请求方式        /// 
        public string HttpMethod { get; set; }        /// 
      
        /// 请求的IP地址        /// 
        public string IP { get; set; }        /// 
      
        /// 获取监控指标日志        /// 
        /// 
              /// 
              public string GetLoginfo()        {            //ControllerName:{0}Controller            //ActionName:{1}             //开始时间:{2}            //结束时间:{3}            //总 时 间:{4}秒            //Action参数:{5}            //Http请求头:{6}            //客户端IP:{7}             //HttpMethod:{8}            string Msg = "Action执行监控:\r\nControllerName:{0}Controller\r\nActionName:{1}\r\n开始时间:{2}\r\n结束时间:{3}\r\n总 时 间:{4}秒\r\nAction参数:{5}\r\nHttp请求头:{6}\r\n客户端IP:{7}\r\nHttpMethod:{8}";            return string.Format(Msg,                ControllerName,                ActionName,                ExecuteStartTime,                ExecuteEndTime,                (ExecuteEndTime - ExecuteStartTime).TotalSeconds,                GetCollections(ActionParams),                HttpRequestHeaders,                GetIP(),                HttpMethod);        }        /// 
      
        /// 获取Action 参数        /// 
        /// 
              /// 
              public string GetCollections(Dictionary
      
        Collections)        {            string Parameters = string.Empty;            if (Collections == null || Collections.Count == 0)            {                return Parameters;            }            foreach (string key in Collections.Keys)            {                Parameters += string.Format("{0}={1}&", key, Collections[key]);            }            if (!string.IsNullOrWhiteSpace(Parameters) && Parameters.EndsWith("&"))            {                Parameters = Parameters.Substring(0, Parameters.Length - 1);            }            return Parameters;        }        /// 
       
        /// 获取IP        /// 
        /// 
               public string GetIP()        {            string ip = string.Empty;            if (!string.IsNullOrEmpty(System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"]))                ip = Convert.ToString(System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]);            if (string.IsNullOrEmpty(ip))                ip = Convert.ToString(System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]);            return ip;        }    }
      
     

2、在Helper文件夹内，定义一个LoggerHelper，日志帮助类

public class LoggerHelper    {        private static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("loginfo");        private static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror");        private static readonly log4net.ILog logmonitor = log4net.LogManager.GetLogger("logmonitor");        public static void Error(string ErrorMsg, Exception ex = null)        {            if (ex != null)            {                logerror.Error(ErrorMsg, ex);            }            else            {                logerror.Error(ErrorMsg);            }        }        public static void Info(string Msg)        {            loginfo.Info(Msg);        }        public static void Monitor(string Msg)        {            logmonitor.Info(Msg);        }    }

3、在App_Start文件夹内，定义一个WebApiTrackerAttribute特性类，继承于ActionFilterAttribute，并在App_Start的WebApiConfig.cs进行注册

/// 
    /// WebAPI监控    /// 
    public class WebApiTrackerAttribute : ActionFilterAttribute    {        private readonly string Key = "_thisWebApiOnActionMonitorLog_";        /// 
        /// 调用前验证        /// 
        /// 操作上下文        public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)        {            base.OnActionExecuting(actionContext);            ZrTestItemsWebApi.Models.WebApiMonitorLog MonLog = new ZrTestItemsWebApi.Models.WebApiMonitorLog();            MonLog.ExecuteStartTime = DateTime.Now;            //获取Action 参数            MonLog.ActionParams = actionContext.ActionArguments;            MonLog.HttpRequestHeaders = actionContext.Request.Headers.ToString();            MonLog.HttpMethod = actionContext.Request.Method.Method;            actionContext.Request.Properties[Key] = MonLog;            var form = System.Web.HttpContext.Current.Request.Form;            #region 如果参数是实体对象，获取序列化后的数据            Stream stream = actionContext.Request.Content.ReadAsStreamAsync().Result;            Encoding encoding = Encoding.UTF8;            stream.Position = 0;            string responseData = "";            using (StreamReader reader = new StreamReader(stream, encoding))            {                responseData = reader.ReadToEnd().ToString();            }            if (!string.IsNullOrWhiteSpace(responseData) && !MonLog.ActionParams.ContainsKey("__EntityParamsList__"))            {                MonLog.ActionParams["__EntityParamsList__"] = responseData;            }            #endregion        }        /// 
        /// 验证之后        /// 
        /// 操作上下文        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)        {            ZrTestItemsWebApi.Models.WebApiMonitorLog MonLog = actionExecutedContext.Request.Properties[Key] as ZrTestItemsWebApi.Models.WebApiMonitorLog;            MonLog.ExecuteEndTime = DateTime.Now;            MonLog.ActionName = actionExecutedContext.ActionContext.ActionDescriptor.ActionName;            MonLog.ControllerName = actionExecutedContext.ActionContext.ActionDescriptor.ControllerDescriptor.ControllerName;            log4net.LogManager.GetLogger("logmonitor").Info(MonLog.GetLoginfo());            if (actionExecutedContext.Exception != null)            {                string Msg = string.Format("请求【{0}Controller】的【{1}】产生异常:\r\n异常信息:{2}\r\nAction参数:{3}\r\nHttp请求头:{4}\r\n客户端IP:{5}\r\nHttpMethod:{6}", MonLog.ControllerName, MonLog.ActionName, actionExecutedContext.Exception.ToString(), MonLog.GetCollections(MonLog.ActionParams), MonLog.HttpRequestHeaders, MonLog.GetIP(), MonLog.HttpMethod);                log4net.LogManager.GetLogger("logerror").Error(Msg);            }            base.OnActionExecuted(actionExecutedContext);        }    }

4、在Configs文件夹内，新建一个log4net.config

5、启用log4net配置，在Global.asax中注册log4net

void Application_Start(object sender, EventArgs e)        {            // 在应用程序启动时运行的代码            ZrTestItemsWebApi.App_Start.WebApiConfig.Register(System.Web.Http.GlobalConfiguration.Configuration);            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(AppDomain.CurrentDomain.BaseDirectory + "\\Configs\\log4net.config"));//启用log4net配置        }

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