/// <summary> /// 對文件流進行MD5加密 /// </summary> /// <param name="filePath"></param> /// <returns></returns> /// <example></example> public static string MD5Stream(string filePath) {FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();md5.ComputeHash(fs);fs.Close();byte[] b = md5.Hash;md5.Clear();StringBuilder sb = new StringBuilder(32);for (int i = 0; i < b.Length; i++){sb.Append(b[i].ToString("X2"));}Console.WriteLine(sb.ToString());Console.ReadLine();return sb.ToString(); }/// <summary> /// 對文件進行MD5加密 /// </summary> /// <param name="filePath"></param> public static void MD5File(string filePath) {FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);int bufferSize = 1048576; // 緩沖區大小，1MBbyte[] buff = new byte[bufferSize];MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();md5.Initialize();long offset = 0;while (offset < fs.Length){long readSize = bufferSize;if (offset + readSize > fs.Length){readSize = fs.Length - offset;}fs.Read(buff, 0, Convert.ToInt32(readSize)); // 讀取一段數據到緩沖區if (offset + readSize < fs.Length) // 不是最后一塊{md5.TransformBlock(buff, 0, Convert.ToInt32(readSize), buff, 0);}else // 最后一塊{md5.TransformFinalBlock(buff, 0, Convert.ToInt32(readSize));}offset += bufferSize;}fs.Close();byte[] result = md5.Hash;md5.Clear();StringBuilder sb = new StringBuilder(32);for (int i = 0; i < result.Length; i++){sb.Append(result[i].ToString("X2"));}Console.WriteLine(sb.ToString());Console.ReadLine(); }

轉載于?https://www.cnblogs.com/ahui/archive/2010/12/23/1914586.html

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