.NET 定时执行写日志任务解决方案(Timer & Quartz.Net)

共有两种方法：

一。使用Timer

Global.asax.cs代码：

引入命名空间: System.IO;

protected void Application_Start(object sender, EventArgs e)
{
System.Timers.Timer myTimer = new System.Timers.Timer(10000);
myTimer.Elapsed += new System.Timers.ElapsedEventHandler(OnTimedEvent);
myTimer.Interval = 10000;
myTimer.Enabled = true;

}

private static void OnTimedEvent(object source, System.Timers.ElapsedEventArgs e)
{

//指定日志文件的目录
string fileLogPath = AppDomain.CurrentDomain.BaseDirectory;
string fileLogName = "LogProjectTest_" + DateTime.Now.ToLongDateString() + "_log.txt";
/定义文件信息对象
FileInfo finfo = new FileInfo(fileLogPath + fileLogName);

//创建只写文件流
using (FileStream fs = finfo.OpenWrite())
{
//根据上面创建的文件流创建写数据流
StreamWriter strwriter = new StreamWriter(fs);
//设置写数据流的起始位置为文件流的末尾
strwriter.BaseStream.Seek(0, SeekOrigin.End);
//写入错误发生时间
strwriter.WriteLine("发生时间: " + DateTime.Now.ToString());
//写入日志内容并换行
strwriter.WriteLine("错误内容: " + message);
strwriter.WriteLine("错误内容: ");
//写入间隔符
strwriter.WriteLine("---------------------------------------------");
strwriter.WriteLine();
//清空缓冲区内容，并把缓冲区内容写入基础流
strwriter.Flush();
//关闭写数据流
strwriter.Close();
fs.Close();
}
}

二，使用Quartz.Net

Quartz是一个Java开源的作业调度框架。官方网站：http://www.opensymphony.com/quartz/

IBM网站上有一篇简单易懂的文章：http://www.ibm.com/developerworks/cn/java/j-quartz/

Quartz.net是从java版本移植到.net版本的。官方网站：http://quartznet.sourceforge.net/

具体代码如下：

1.在项目添加引用：

Quartz.dll

Common.Logging.dll

2.创建一个普通类，实现Quartz.IJob接口

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Quartz;
using System.IO;
namespace EMailShechelTest
{
public class WriteLogJob:IJob
{
public void Execute(JobExecutionContext context)
{

string fileLogPath = AppDomain.CurrentDomain.BaseDirectory;
string fileLogName = "LogProject_" + DateTime.Now.ToLongDateString() + "_log.txt";

FileInfo finfo = new FileInfo(fileLogPath + fileLogName);

//创建只写文件流
using (FileStream fs = finfo.OpenWrite())
{
//根据上面创建的文件流创建写数据流
StreamWriter strwriter = new StreamWriter(fs);
//设置写数据流的起始位置为文件流的末尾
strwriter.BaseStream.Seek(0, SeekOrigin.End);
//写入错误发生时间
strwriter.WriteLine("发生时间: " + DateTime.Now.ToString());
//写入日志内容并换行
//strwriter.WriteLine("错误内容: " + message);
strwriter.WriteLine("错误内容: ");
//写入间隔符
strwriter.WriteLine("---------------------------------------------");
strwriter.WriteLine();
//清空缓冲区内容，并把缓冲区内容写入基础流
strwriter.Flush();
//关闭写数据流
strwriter.Close();
fs.Close();
}
}

}
}

3.定义一个执行任务调度的类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Quartz;
using Quartz.Impl;
namespace EMailShechelTest
{
public class WriteLogScheduler
{
static ISchedulerFactory _sf = new StdSchedulerFactory();
static IScheduler _sched = _sf.GetScheduler();

static WriteLogScheduler _instance=null;
static object lockObj=new object ();

public static WriteLogScheduler Instance
{
get
{
if (_instance == null)
{
lock (lockObj)
{
if (_instance == null)
{
_instance = new WriteLogScheduler();
}
}
}
return _instance;
}
}

public void Start()
{
JobDetail job = new JobDetail("WriteLog", "Log", typeof(WriteLogJob));
DateTime start = TriggerUtils.GetNextGivenSecondDate(null, 5);

TimeSpan interval = TimeSpan.FromSeconds(10);
Trigger trigger = new SimpleTrigger("WriteLog", "Log", "WriteLog", "Log", start, null, 10, interval);

_sched.AddJob(job, true);
DateTime dt = _sched.ScheduleJob(trigger);
_sched.Start();
}
public void Stop()
{
_sched.Shutdown(true);
}

}
}

4.在Global.asax.cs代码

protected void Application_Start(object sender, EventArgs e)
{

WriteLogScheduler.Instance.Start();
}

protected void Application_End(object sender, EventArgs e)
{
WriteLogScheduler.Instance.Stop();
}