C# 简单的往txt中写日志,调试时很有用

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");