? /// <summary>
??????? /// 計算文件MD5值
??????? /// </summary>
??????? /// <param name="str">需要計算的文件路徑</param>
??????? /// <returns>MD5值</returns>
??????? public static string MD5Value(String filepath)
??????? {
??????????? MD5 md5 = new MD5CryptoServiceProvider();
??????????? byte[] md5ch;
??????????? using (FileStream fs = File.OpenRead(filepath))
??????????? {
??????????????? md5ch = md5.ComputeHash(fs);
??????????? }
??????????? md5.Clear();
??????????? string strMd5 = "";
??????????? for (int i = 0; i < md5ch.Length - 1; i++)
??????????? {
??????????????? strMd5 += md5ch[i].ToString("x").PadLeft(2, '0');
??????????? }
??????????? return strMd5;
??????? }

??????? /// <summary>
??????? /// 計算字符串的md5值
??????? /// </summary>
??????? /// <param name="sDataIn"></param>
??????? /// <returns></returns>
??????? public static string GetMD5(string sDataIn)
??????? {
??????????? MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
??????????? byte[] bytValue, bytHash;
??????????? bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);
??????????? bytHash = md5.ComputeHash(bytValue);
??????????? md5.Clear();
??????????? string sTemp = "";
??????????? for (int i = 0; i < bytHash.Length; i++)
??????????? {
??????????????? sTemp += bytHash[i].ToString("X").PadLeft(2, '0');
??????????? }
??????????? return sTemp.ToLower();
??????? }

轉載于:https://www.cnblogs.com/dmh365/archive/2011/04/18/2019583.html

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