- 一:字符串加密:
- public static String GetMD5(string input)
- {
- System.Security.Cryptography.MD5CryptoServiceProvider x=newSystem.Security.Cryptography.MD5CryptoServiceProvider();
- byte[]bs =System.Text.Encoding.UTF8.GetBytes(input);
- bs =x.ComputeHash(bs);
- System.Text.StringBuilder s =newSystem.Text.StringBuilder();
- foreach(byte b inbs)
- {
- s.Append(b.ToString("x2").ToLower());
- }
- returns.ToString();
- }
- 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();
- }
- 二:文件加密:
- /// <summary>
- /// 计算文件MD5值
- /// </summary>
- /// <param name="str">需要计算的文件路径</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;
- }
来源: http://www.phpxs.com/code/1004752/