对于文件的唯一标示信息,不应该知识版本,日期等,常常大家会看到Md5的信息，这里提供下C#中获取文件的Md5信息，
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#region 文件MD5信息 /// <summary> /// 获取文件的MD5信息 /// </summary> /// <param name="fileName">文件名</param> /// <returns>MD5信息</returns> public static string GetMD5HashFromFile(string fileName) { try { FileStream file = new FileStream(fileName, FileMode.Open); System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider(); byte[] retVal = md5.ComputeHash(file); file.Close(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < retVal.Length; i++) { //---转化为小写的16进制 sb.Append(retVal[i].ToString("x2")); } return sb.ToString(); } catch (Exception ex) { throw new Exception("GetMD5Hash fail," + ex.Message); } } #endregion |
