C#实现一个简单实用的TXT文本操作及日志框架详解

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我是靠谱客的博主健康紫菜，这篇文章主要介绍C#实现一个简单实用的TXT文本操作及日志框架详解，现在分享给大家，希望可以做个参考。

前言

首先先介绍一下这个项目，该项目实现了文本写入及读取，日志写入指定文件夹或默认文件夹，日志数量控制，单个日志大小控制，通过约定的参数让用户可以用更少的代码解决问题。

1.读取文本文件方法

使用：JIYUWU.TXT.TXTHelper.ReadToString（“文件物理路径”）

复制代码

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public static string ReadToString(string path)
 {
  try
  {
  LogLock.EnterReadLock();
  StreamReader sr = new StreamReader(path, Encoding.UTF8);
  StringBuilder sb = new StringBuilder();
  string line;
  while ((line = sr.ReadLine()) != null)
  {
   sb.AppendLine(line.ToString());
  }
  sr.Close();
  sr.Dispose();
  return sb.ToString();
  }
  catch (IOException e)
  {
  Console.WriteLine(e.ToString());
  return null;
  }
  finally
  {
  LogLock.ExitReadLock();
  }
 }

实现解析：

（1.为防止任务读取当我们进行读取时需要添加读取锁保证可以依次读取，否则可能出现被占用异常。

（2.创建读取流StreamReader（注意：由于会出现乱码这里要改一下把默认改为Encoding.UTF8），依次读取每一行。

（3.读取完成释放资源。并解锁。

2.写入文本文件方法

（1.创建文本并写入

使用：JIYUWU.TXT.TXTHelper.CreateWrite（“文件物理路径”，“文本内容”）

复制代码

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public static bool CreateWrite(string path, string context)
 {
  bool b = false;
  try
  {
  LogLock.EnterWriteLock();
  FileStream fs = new FileStream(path, FileMode.Create);
  //获得字节数组
  byte[] data = System.Text.Encoding.Default.GetBytes(context);
  //开始写入
  fs.Write(data, 0, data.Length);
  //清空缓冲区、关闭流
  fs.Flush();
  fs.Close();
  return b;
  }
  catch (Exception ex)
  {
  Console.WriteLine(ex.ToString());
  return b;
  }
  finally
  {
  LogLock.ExitWriteLock();
  }
 }

（2.在文本文件末尾追加写入

使用：JIYUWU.TXT.TXTHelper.WriteAppend（“文件物理路径”，“文本内容”）

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public static bool WriteAppend(string path, string context)
 {
  bool b = false;
  try
  {
  LogLock.EnterWriteLock();
  FileStream fs = new FileStream(path, FileMode.Append);
  StreamWriter sw = new StreamWriter(fs);
  //开始写入
  sw.Write(context);
  //清空缓冲区
  sw.Flush();
  //关闭流
  sw.Close();
  fs.Close();
  return b;
  }
  catch (Exception ex)
  {
  Console.WriteLine(ex.ToString());
  return b;
  }
  finally
  {
  LogLock.ExitWriteLock();
  }
 }

（3.自动判断换行追加或创建文本

使用：JIYUWU.TXT.TXTHelper.CreateOrWriteAppendLine（“文件物理路径”，“文本内容”）

复制代码

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public static bool CreateOrWriteAppendLine(string path, string context)
 {
  bool b = false;
  try
  {
  LogLock.EnterWriteLock();
  if (!File.Exists(path))
  {
   FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write);
   StreamWriter sw = new StreamWriter(fs);
   long fl = fs.Length;
   fs.Seek(fl, SeekOrigin.End);
   sw.WriteLine(context);
   sw.Flush();
   sw.Close();
   fs.Close();
   b = true;
  }
  else
  {
   FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Write);
   StreamWriter sw = new StreamWriter(fs);
   long fl = fs.Length;
   fs.Seek(fl, SeekOrigin.Begin);
   sw.WriteLine(context);
   sw.Flush();
   sw.Close();
   fs.Close();
   b = true;
  }
  return b;
  }
  catch (Exception ex)
  {
  Console.WriteLine(ex.ToString());
  return b;
  }
  finally
  {
  LogLock.ExitWriteLock();
  }
 }

实现解析：

（1）为防止多任务读取当我们进行读取时需要添加读取锁保证可以依次写入，否则可能出现被占用异常。

（2）创建文本流FileStream及写入流StreamWriter，直接进行数据写入。

（3）读取完成释放资源。并解锁。

3.写入日志

使用：JIYUWU.TXT.TXTHelper.WriteLog（“文本内容”，“单个文件大小（选填默认1M）”，“目录下文件数量（选填默认20个）”，“输出目录（选填默认bin文件下）”）

复制代码

public static void WriteLog(string content, int fileSize = 1, int fileCount = 20, string filePath = "")
 {
  try
  {
  if (!string.IsNullOrWhiteSpace(filePath))
  {
   logPath = filePath;
  }
  LogLock.EnterWriteLock();
  logPath = logPath.Replace("file:\", "");//这里为了兼容webapi的情况
  string dataString = DateTime.Now.ToString("yyyy-MM-dd");
  string path = logPath + "\MyLog";
  if (!Directory.Exists(path))
  {
   Directory.CreateDirectory(path);
   path += "\";
   path += DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
   FileStream fs = new FileStream(path, FileMode.Create);
   fs.Close();
  }
  else
  {
   int x = System.IO.Directory.GetFiles(path).Count();
   path += "\";
   Dictionary<string, DateTime> fileCreateDate = new Dictionary<string, DateTime>();
   string[] filePathArr = Directory.GetFiles(path, "*.txt", SearchOption.TopDirectoryOnly);
   if (filePathArr.Length == 0)
   {
   string sourceFilePath = path;
   path += DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
   FileStream fs = new FileStream(path, FileMode.Create);
   fs.Close();
   filePathArr = Directory.GetFiles(sourceFilePath, "*.txt", SearchOption.TopDirectoryOnly);
   }
   for (int i = 0; i < filePathArr.Length; i++)
   {
   FileInfo fi = new FileInfo(filePathArr[i]);
   fileCreateDate[filePathArr[i]] = fi.CreationTime;
   }
   fileCreateDate = fileCreateDate.OrderBy(f => f.Value).ToDictionary(f => f.Key, f => f.Value);
   FileInfo fileInfo = new FileInfo(fileCreateDate.Last().Key);
   if (fileInfo.Length < 1024 * 1024 * fileSize)
   {
   path = fileCreateDate.Last().Key;
   }
   else
   {
   path += DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
   FileStream fs = new FileStream(path, FileMode.Create);
   fs.Close();
   }
   if (x > fileCount)
   {
   File.Delete(fileCreateDate.First().Key);
   }

}
  FileStream fs2 = new FileStream(path, FileMode.Open, FileAccess.Write);
  StreamWriter sw = new StreamWriter(fs2);
  long fl = fs2.Length;
  fs2.Seek(fl, SeekOrigin.Begin);
  sw.WriteLine(DateTime.Now.ToString("hh:mm:ss") + "---> " + content);
  sw.Flush();
  sw.Close();
  fs2.Close();
  }
  catch (Exception ex)
  {
  Console.WriteLine(ex.ToString());
  }
  finally
  {
  LogLock.ExitWriteLock();
  }

}

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public static void WriteLog(string content, int fileSize = 1, int fileCount = 20, string filePath = "")
 {
  try
  {
  if (!string.IsNullOrWhiteSpace(filePath))
  {
   logPath = filePath;
  }
  LogLock.EnterWriteLock();
  logPath = logPath.Replace("file:\", "");//这里为了兼容webapi的情况
  string dataString = DateTime.Now.ToString("yyyy-MM-dd");
  string path = logPath + "\MyLog";
  if (!Directory.Exists(path))
  {
   Directory.CreateDirectory(path);
   path += "\";
   path += DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
   FileStream fs = new FileStream(path, FileMode.Create);
   fs.Close();
  }
  else
  {
   int x = System.IO.Directory.GetFiles(path).Count();
   path += "\";
   Dictionary<string, DateTime> fileCreateDate = new Dictionary<string, DateTime>();
   string[] filePathArr = Directory.GetFiles(path, "*.txt", SearchOption.TopDirectoryOnly);
   if (filePathArr.Length == 0)
   {
   string sourceFilePath = path;
   path += DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
   FileStream fs = new FileStream(path, FileMode.Create);
   fs.Close();
   filePathArr = Directory.GetFiles(sourceFilePath, "*.txt", SearchOption.TopDirectoryOnly);
   }
   for (int i = 0; i < filePathArr.Length; i++)
   {
   FileInfo fi = new FileInfo(filePathArr[i]);
   fileCreateDate[filePathArr[i]] = fi.CreationTime;
   }
   fileCreateDate = fileCreateDate.OrderBy(f => f.Value).ToDictionary(f => f.Key, f => f.Value);
   FileInfo fileInfo = new FileInfo(fileCreateDate.Last().Key);
   if (fileInfo.Length < 1024 * 1024 * fileSize)
   {
   path = fileCreateDate.Last().Key;
   }
   else
   {
   path += DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
   FileStream fs = new FileStream(path, FileMode.Create);
   fs.Close();
   }
   if (x > fileCount)
   {
   File.Delete(fileCreateDate.First().Key);
   }

  }
  FileStream fs2 = new FileStream(path, FileMode.Open, FileAccess.Write);
  StreamWriter sw = new StreamWriter(fs2);
  long fl = fs2.Length;
  fs2.Seek(fl, SeekOrigin.Begin);
  sw.WriteLine(DateTime.Now.ToString("hh:mm:ss") + "---> " + content);
  sw.Flush();
  sw.Close();
  fs2.Close();
  }
  catch (Exception ex)
  {
  Console.WriteLine(ex.ToString());
  }
  finally
  {
  LogLock.ExitWriteLock();
  }

 }