using System;
using System.Collections.Generic;
using System.Linq; 

namespace EShang.Common
{
    public class PayHelper
    {

        /// <summary>
        /// 支付获取签名
        /// </summary>
        /// <param name="dic"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string getSign(Dictionary<string, string> dic, string key)
        {
            var list = dic.OrderBy(s => s.Key);
            string str = "";
            foreach (var ss in list)
            {
                str += ss.Key + "=" + ss.Value + "&";
            }
            str += "key=" + key;
            str = MD5Util.GetMD5(str , "UTF-8").ToUpper();
            return str;
        }

        /// <summary>
        /// Dictionary 对象转换字符串
        /// </summary>
        /// <param name="dic"></param>
        /// <returns></returns>
        public static string paramsToString(Dictionary<string, string> dic)
        {
            string str = String.Empty;
            foreach (var e in dic)
            {
                str += e.Key + "=" + e.Value + "&";
            }
            str = str.TrimEnd('&');
            return str;
        } 

    }
}