Web/App_Code/AliPay.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Security.Cryptography;
/// <summary>
/// New Interface for AliPay
/// </summary>

    /// <summary>
    /// created by sunzhizhi 2006.5.21,sunzhizhi@msn.com。
    /// </summary>
    public class AliPay
    {

        public static string GetMD5(string s, string _input_charset)
        {

            /// <summary>
            /// 与ASP兼容的MD5加密算法
            /// </summary>

            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
            StringBuilder sb = new StringBuilder(32);
            for (int i = 0; i < t.Length; i++)
            {
                sb.Append(t[i].ToString("x").PadLeft(2, '0'));
            }
            return sb.ToString();
        }

        public static string[] BubbleSort(string[] r)
        {
            /// <summary>
            /// 冒泡排序法
            /// </summary>

            int i, j; //交换标志 
            string temp;

            bool exchange;

            for (i = 0; i < r.Length; i++) //最多做R.Length-1趟排序 
            {
                exchange = false; //本趟排序开始前，交换标志应为假

                for (j = r.Length - 2; j >= i; j--)
                {
                    if (System.String.CompareOrdinal(r[j + 1], r[j]) < 0)　//交换条件
                    {
                        temp = r[j + 1];
                        r[j + 1] = r[j];
                        r[j] = temp;