public class FileSystemWatcherSingle{public FileSystemWatcher wather;private static FileSystemWatcherSingle _instance;private static readonly object _objLock = new object();public Queue<Log> MyQueue;private string _watherFolderPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Log");private FileSystemWatcherSingle(){if (MyQueue == null){MyQueue = new Queue<Log>();}if (wather == null){wather = new FileSystemWatcher();if (!Directory.Exists(_watherFolderPath)){Directory.CreateDirectory(_watherFolderPath);}wather.Path = _watherFolderPath;wather.EnableRaisingEvents = true;}}public static FileSystemWatcherSingle CreateInstance(){if (_instance == null){lock (_objLock){if (_instance == null){_instance = new FileSystemWatcherSingle();}}}return _instance;}}

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;namespace Wolfy.LogMonitor.Models
{public class LogHelper{public static void WriteLog(Log log){string dir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Log");if (!Directory.Exists(dir)){Directory.CreateDirectory(dir);}string _watherFilePath = Path.Combine(dir, DateTime.Now.ToString("yyyy-MM-dd") + ".log");if (!File.Exists(_watherFilePath)){File.Create(_watherFilePath);}FileSystemWatcherSingle wather = FileSystemWatcherSingle.CreateInstance();wather.MyQueue.Enqueue(log);File.AppendAllText(_watherFilePath, string.Format("{0} {1}\r\n{2}", log.Type.ToString(), log.Dt, log.Content));            }}
}

using Microsoft.Owin;
using Owin;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Wolfy.LogMonitor.App_Start;
[assembly: OwinStartup(typeof(Startup))]
namespace Wolfy.LogMonitor.App_Start
{public class Startup{public void Configuration(IAppBuilder app){app.MapSignalR();}}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Hubs;
using System.Timers;
using Newtonsoft.Json;namespace Wolfy.LogMonitor.Models
{[HubName("logHub")]public class LogHub : Hub{private FileSystemWatcherSingle fileWather;public void Send(string name, string message){// Call the addNewMessageToPage method to update clients.Clients.All.addNewMessageToPage(name, message);}public LogHub(){fileWather = FileSystemWatcherSingle.CreateInstance();fileWather.wather.Changed += wather_Changed;fileWather.wather.Created += wather_Created;}void wather_Created(object sender, System.IO.FileSystemEventArgs e){this.Send("system", "创建文件:" + e.Name);}void wather_Changed(object sender, System.IO.FileSystemEventArgs e){while (fileWather.MyQueue != null && fileWather.MyQueue.Count > 0){Log log = fileWather.MyQueue.Dequeue();if (log != null){this.Send(log.Type.ToString(), JsonConvert.SerializeObject(log));}}}}
}

@{ViewBag.Title = "Home";
}<div id="container">
</div><script>$(function () {// Reference the auto-generated proxy for the hub.var log = $.connection.logHub;console.log(log);// Create a function that the hub can call back to display messages.log.client.addNewMessageToPage = function (name, message) {console.log(name);console.log(message);// Add the message to the page.if (name === "Info") {                $('#container').append('<p style="color:green;">' + message + '</p>');} else {$('#container').append('<p style="color:red;">' + message + '</p>');}};// Start the connection.$.connection.hub.start().done();});</script>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Wolfy.LogMonitor.Models;namespace Wolfy.LogMonitor.Controllers
{public class LogController : Controller{// GET: Logpublic ActionResult Home(){return View();}public ActionResult Test(){LogType[] logtypes = { LogType.Info, LogType.Error };Random r = new Random();int index = r.Next(0, 2);LogHelper.WriteLog(new Log { Content = "这是一次日志", Dt = DateTime.Now, Type = logtypes[index] });return View();}}
}