写日志 log 到文件夹

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace DBUtility
{
public class FileHelper
{
public static void writeLog(string strSQL)
{
try
{
string strFileName = DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
string strPath = "d:/log/";
string strAllPath = strPath + strFileName;

if (!Directory.Exists(strPath))
{
Directory.CreateDirectory(strPath);
}

if (File.Exists(strAllPath))
{
StreamWriter sw = new StreamWriter(strAllPath, true);
sw.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + " " + strSQL); // 写入Hello World
sw.Close(); //关闭文件
}
else
{
FileStream fs = new FileStream(strAllPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
StreamWriter sw = new StreamWriter(fs); // 创建写入流
sw.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + " " + strSQL); // 写入Hello World
sw.Close(); //关闭文件
fs.Close();
}
}
catch (Exception ex) { }
finally { }
}
}
}

Request.UserAgent, Request.UserHostAddress, Request.Browser.Browser

写日志 log 到文件夹

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原文地址：http://www.cnblogs.com/zhang-wenbin/p/5973455.html