DAL/ComnClass.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.Web;
namespace Express
{
    public class ComnClass
    {
        /// <summary>
        /// 16MD5加密
        /// </summary>
        /// <param name="password"></param>
        /// <returns></returns>
        public static string MD5Encrypt16(string password)
        {
            var md5 = new MD5CryptoServiceProvider();
            string str16 = BitConverter.ToString(md5.ComputeHash(Encoding.Default.GetBytes(password)), 4, 8);
            str16 = str16.Replace("-", "");
            return str16;
        }
        /// <summary>
        /// 32MD5加密
        /// </summary>
        /// <param name="password"></param>
        /// <returns></returns>
        private static string MD5Encrypt32(string password)
        {
            string c32 = password;
            string pwd32 = "";
            MD5 md5 = MD5.Create();
            byte[] s32 = md5.ComputeHash(Encoding.UTF8.GetBytes(c32));
            for (int i = 0; i < s32.Length; i++)
            {
                pwd32 = pwd32 + s32[i].ToString("X");
            }
            return pwd32;
        }
        /// <summary>
        /// 64MD5加密
        /// </summary>
        /// <param name="password"></param>
        /// <returns></returns>
        private static string MD5Encrypt64(string password)
        {
            string c64 = password;
            MD5 md5 = MD5.Create();
            byte[] s64 = md5.ComputeHash(Encoding.UTF8.GetBytes(c64));
            return Convert.ToBase64String(s64);
        }
        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="password"></param>
        /// <param name="codelength"></param>
        /// <returns></returns>
        private static string md5(string password, int codelength)
        {
            if (!string.IsNullOrEmpty(password))