记录一个文件操作类
记录一个C#语言文件操作类
主要功能:
1、压缩和解压字符串 2、字符串数组转换
FileHelper.cs
/// <summary> /// 文件帮助类 /// </summary> public static class FileHelper { #region 压缩和解压字符串 /// <summary> /// 将传入字符串以GZip算法压缩后,返回Base64编码字符 /// </summary> /// <param name="rawString">需要压缩的字符串</param> /// <returns>压缩后的Base64编码的字符串</returns> public static string GZipCompressString(string rawString) { if (string.IsNullOrEmpty(rawString) || rawString.Length == 0) { return ""; } else { byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString.ToString()); byte[] zippedData = Compress(rawData); return (string)(Convert.ToBase64String(zippedData)); } } /// <summary> /// GZip压缩 /// </summary> /// <param name="rawData"></param> /// <returns></returns> public static byte[] Compress(byte[] rawData) { System.IO.MemoryStream ms = new System.IO.MemoryStream(); System.IO.Compression.GZipStream compressedzipStream = new System.IO.Compression.GZipStream(ms, System.IO.Compression.CompressionMode.Compress, true); compressedzipStream.Write(rawData, 0, rawData.Length); compressedzipStream.Close(); return ms.ToArray(); } /// <summary> /// 解压Sring /// </summary> /// <param name="Value"></param> /// <returns></returns> public static string GetStringByString(string Value) { string CC = GZipDecompressString(Value); return CC; } /// <summary> /// 将传入的二进制字符串资料以GZip算法解压缩 /// </summary> /// <param name="zippedString">经GZip压缩后的二进制字符串</param> /// <returns>原始未压缩字符串</returns> public static string GZipDecompressString(string zippedString) { if (string.IsNullOrEmpty(zippedString) || zippedString.Length == 0) { return ""; } else { byte[] zippedData = Convert.FromBase64String(zippedString.ToString()); return (string)(System.Text.Encoding.UTF8.GetString(Decompress(zippedData))); } } /// <summary> /// ZIP解压 /// </summary> /// <param name="zippedData"></param> /// <returns></returns> public static byte[] Decompress(byte[] zippedData) { System.IO.MemoryStream ms = new System.IO.MemoryStream(zippedData); System.IO.Compression.GZipStream compressedzipStream = new System.IO.Compression.GZipStream(ms, System.IO.Compression.CompressionMode.Decompress); System.IO.MemoryStream outBuffer = new System.IO.MemoryStream(); byte[] block = new byte[1024]; while (true) { int bytesRead = compressedzipStream.Read(block, 0, block.Length); if (bytesRead <= 0) break; else outBuffer.Write(block, 0, bytesRead); } compressedzipStream.Close(); return outBuffer.ToArray(); } #endregion /// <summary> /// 文章转换base64字符串 /// </summary> /// <param name="path"></param> /// <returns></returns> public static string BaseStrFromFile(string path) { if (File.Exists(path) == false) return string.Empty; try { using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read)) { string basestr = string.Empty; fs.Seek(0, SeekOrigin.Begin); byte[] data = new byte[fs.Length]; int log = Convert.ToInt32(fs.Length); fs.Read(data, 0, log); basestr = Convert.ToBase64String(data); fs.Close(); return basestr; } } catch (Exception ex) { Logger.logError(ex); return string.Empty; } } /// <summary> /// 文章转换byte数组 /// </summary> /// <param name="path"></param> /// <returns></returns> public static byte[] ByteFromFileData(string path) { if (File.Exists(path) == false) return null; try { using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read)) { // string basestr = string.Empty; fs.Seek(0, SeekOrigin.Begin); byte[] data = new byte[fs.Length]; int log = Convert.ToInt32(fs.Length); fs.Read(data, 0, log); //basestr = Convert.ToBase64String(data); return data; } } catch (Exception ex) { Logger.logError(ex); return null; } } /// <summary> /// Base64字符串转文件并保存 /// </summary> /// <param name="data">base64字符串</param> /// <param name="fileName">保存的文件名</param> /// <returns>是否转换并保存成功</returns> public static bool ByteToFile(byte[] data, string fileFullPath) { bool opResult = false; try { if (data != null && data.Length > 0) { string strDate = DateTime.Now.ToString("yyyyMMdd"); using (FileStream fs = new FileStream(fileFullPath, FileMode.OpenOrCreate, FileAccess.Write)) { fs.Write(data, 0, data.Length); fs.Close(); } } opResult = true; } catch (Exception e) { Logger.logError("异常类型: \t" + e.GetType()); Logger.logError("异常描述:\t" + e.Message); Logger.logError("异常方法:\t" + e.TargetSite); Logger.logError("异常堆栈:\t" + e.StackTrace); } return opResult; } /// <summary> /// Base64字符串转文件并保存 /// </summary> /// <param name="base64String">base64字符串</param> /// <param name="fileName">保存的文件名</param> /// <returns>是否转换并保存成功</returns> public static bool Base64StringToFile(string base64String, string fileFullPath) { bool opResult = false; try { string strDate = DateTime.Now.ToString("yyyyMMdd"); string strbase64 = base64String.Trim().Substring(base64String.IndexOf(",") + 1); //将‘,’以前的多余字符串删除 MemoryStream stream = new MemoryStream(Convert.FromBase64String(strbase64)); using (FileStream fs = new FileStream(fileFullPath, FileMode.OpenOrCreate, FileAccess.Write)) { byte[] b = stream.ToArray(); fs.Write(b, 0, b.Length); fs.Close(); } opResult = true; } catch (Exception e) { Logger.logError("异常类型: \t" + e.GetType()); Logger.logError("异常描述:\t" + e.Message); Logger.logError("异常方法:\t" + e.TargetSite); Logger.logError("异常堆栈:\t" + e.StackTrace); } return opResult; } }