asp.net向文件写入日志

using System;
using System.IO;

namespace WriteLog
{
/// <summary>
/// WriteInLog 的摘要说明。
/// </summary>
public class WriteInLog
{
private string logFileName;
private int logFileSizes;

/// <summary>
/// 写入日志文件
/// </summary>
public WriteInLog()
{
logFileName = @"d:/logfile.txt";
}

/// <summary>
/// 自动删除日志文件大小,此方法已经重载.
/// </summary>
/// <param name="fileSize">日志文件大小,单位KB</param>
public WriteInLog(int fileSize):this()
{
if(fileSize != 0)
{
this.logFileSizes = fileSize * 1024;
}
else
{
this.logFileSizes = 1024;
}
}
/// <summary>
/// 日志文件完全名,如:@"d:/logfile.txt"
/// </summary>
public string LogFileName
{
set
{
this.logFileName = value;
}
}

/// <summary>
/// 写入日志信息
/// </summary>
/// <param name="msg">日志内容</param>
/// <param name="IsAutoDelete">是否自动删除日志</param>
public void writeInLog(string msg)
{
if(logFileSizes != 0)
{
writeInLog(msg,true);
}
else
{
writeInLog(msg,false);
}
}

/// <summary>
/// 写入日志信息
/// </summary>
/// <param name="msg">日志内容</param>
/// <param name="IsAutoDelete">是否自动删除日志</param>
private void writeInLog(string msg,bool IsAutoDelete)
{
try
{
FileInfo fileinfo=new FileInfo(logFileName);
if(IsAutoDelete)
{
if(fileinfo.Exists && fileinfo.Length >= logFileSizes)
{
fileinfo.Delete();
}
}
using(FileStream fs=fileinfo.OpenWrite())
{
StreamWriter sw=new StreamWriter(fs);
sw.BaseStream.Seek(0,SeekOrigin.End);
sw.WriteLine("=====================================");
sw.Write("添加日期为:" + DateTime.Now.ToString() +"/r/n");
sw.Write("日志内容为:" + msg + "/r/n");
sw.WriteLine("=====================================");
sw.Flush();
sw.Close();
}
}
catch(Exception ex)
{
ex.ToString();
}
}

}
}