c#写日志（.text）
using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Web;
namespace BMCMInterface
{
public class LogFiles
{
private static string _fileName;
private static Dictionary lockDic = new Dictionary();
/// ///获取或设置文件名称 /// public string FileName
{
get { return _fileName; }
set { _fileName = value; }
}
//// ///构造函数 /// ///每次开辟位数大小，这个直接影响到记录文件的效率 ///文件全路径名 public LogFiles(string fileName)
{
_fileName = fileName;
}
/// ///构造函数 /// public LogFiles()
{ }
/// ///创建文件 /// /// public void Create()
{
if (System.IO.File.Exists(_fileName))
{
FileInfo logfileinfo = new FileInfo(_fileName);
if (logfileinfo.Length > 10240000)
{
GenerateNewLogFileName();
}
}
}
/// ///写入文本 /// ///文本内容 private void Write(string content, string newLine, string time)
{
if (string.IsNullOrEmpty(_fileName))
{
GenerateNewLogFileName();
}
Create();
using (System.IO.FileStream fs = new System.IO.FileStream(_fileName, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.ReadWrite, System.IO.FileShare.ReadWrite, 8, System.IO.FileOptions.Asynchronous))
{
//Byte[] dataArray = System.Text.Encoding.ASCII.GetBytes(System.DateTime.Now.ToString() + content + "/r/n"); Byte[] dataArray = System.Text.Encoding.Default.GetBytes(time + " " + content + newLine);
bool flag = true;
long slen = dataArray.Length;
long len = 0;
while (flag)
{
try {
if (len >= fs.Length)
{
fs.Lock(len, slen);
lockDic[len] = slen;
flag = false;
}
else {
len = fs.Length;
}
}
catch (Exception ex)
{
while (!lockDic.ContainsKey(len))
{
len += lockDic[len];
}
}
}
fs.Seek(len, System.IO.SeekOrigin.Begin);
fs.Write(dataArray, 0, dataArray.Length);
fs.Close();
}
}
/// ///写入文件内容 /// /// public void WriteLine(string content)
{
this.Write(content, System.Environment.NewLine, DateTime.Now.ToString());
}
/// ///写入文件 /// /// public void Write(string content)
{
this.Write(content, "", "");
}
/// ///构造log文件名 /// private void GenerateNewLogFileName()
{
//generate a new log file name string strDateTimeString = string.Format("{0:yyyyMMddHHmm}", System.DateTime.Now);
string LogFile_Name = strDateTimeString + ".log";
_fileName = AppDomain.CurrentDomain.BaseDirectory + LogFile_Name;
}
}
}
//赋值：LogFile.FileName =AppDomain.CurrentDomain.BaseDirectory + "logText.log"; //调用：LogFile.WriteLine("获取异常：" + ex.Message + sql);
