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原文 http://blog.csdn.net/hejialin666/article/details/6106648
有些程序在调试时很难抓住断点(如服务程序)，有些程序需要循环无数次，要看每一次或某一次的结果，等等吧！
那就来个简单的写日志程序吧，txt文件生成在debug目录里
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Windows.Forms;
namespace Common
{
public class Log
{
private string logFile;
private StreamWriter writer;
private FileStream fileStream = null;
public Log(string fileName)
{
logFile = fileName;
CreateDirectory(logFile);
}
public void log(string info)
{
try
{
System.IO.FileInfo fileInfo = new System.IO.FileInfo(logFile);
if (!fileInfo.Exists)
{
fileStream = fileInfo.Create();
writer = new StreamWriter(fileStream);
}
else
{
fileStream = fileInfo.Open(FileMode.Append, FileAccess.Write);
writer = new StreamWriter(fileStream);
}
writer.WriteLine(DateTime.Now + ": " + info);
}
finally
{
if (writer != null)
{
writer.Close();
writer.Dispose();
fileStream.Close();
fileStream.Dispose();
}
}
}
public void CreateDirectory(string infoPath)
{
DirectoryInfo directoryInfo = Directory.GetParent(infoPath);
if (!directoryInfo.Exists)
{
directoryInfo.Create();
}
}
}
}
用的时候：
Log log = new Log(AppDomain.CurrentDomain.BaseDirectory + @"/log/Log.txt");
log.log("内容");
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原文地址：http://www.cnblogs.com/qinweizhi/p/5779502.html
