C#实现一个简单实用的TXT文本操作及日志框架详解

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();
  }
 }

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();
  }
 }

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();
  }
 }

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();
  }
 }

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();
  }

 }