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Infrastructure/ServiceClient/Alipay.AopSdk.Core/Business/AlipayCore.cs

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+using System.Collections.Generic;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Alipay.AopSdk.F2FPay.Business
+{
+    /// <summary>
+    /// 类名：Core
+    /// 功能：支付宝接口公用函数类
+    /// 详细：该类是请求、通知返回两个文件所调用的公用函数核心处理文件，不需要修改
+    /// 版本：3.4
+    /// 修改日期：2015-06-05
+    /// 说明：
+    /// 以下代码只是为了方便商户测试而提供的样例代码，商户可以根据自己网站的需要，按照技术文档编写,并非一定要使用该代码。
+    /// 该代码仅供学习和研究支付宝接口使用，只是提供一个参考。
+    /// </summary>
+    public class Core
+    {
+
+        public Core()
+        {
+        }
+
+        /// <summary>
+        /// 除去数组中的空值和签名参数并以字母a到z的顺序排序
+        /// </summary>
+        /// <param name="dicArrayPre">过滤前的参数组</param>
+        /// <returns>过滤后的参数组</returns>
+        public static Dictionary<string, string> FilterPara(SortedDictionary<string, string> dicArrayPre)
+        {
+            Dictionary<string, string> dicArray = new Dictionary<string, string>();
+            foreach (KeyValuePair<string, string> temp in dicArrayPre)
+            {
+                if (temp.Key.ToLower() != "sign" && temp.Key.ToLower()!="sign_type"  && temp.Value != "" && temp.Value != null)
+                {
+                    dicArray.Add(temp.Key, temp.Value);
+                }
+            }
+
+            return dicArray;
+        }
+
+        /// <summary>
+        /// 把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串
+        /// </summary>
+        /// <param name="sArray">需要拼接的数组</param>
+        /// <returns>拼接完成以后的字符串</returns>
+        public static string CreateLinkString(Dictionary<string, string> dicArray)
+        {
+            StringBuilder prestr = new StringBuilder();
+            foreach (KeyValuePair<string, string> temp in dicArray)
+            {
+                prestr.Append(temp.Key + "=" + temp.Value + "&");
+            }
+
+            //去掉最後一個&字符
+            int nLen = prestr.Length;
+            prestr.Remove(nLen-1,1);
+
+            return prestr.ToString();
+        }
+
+        /// <summary>
+        /// 把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串，并对参数值做urlencode
+        /// </summary>
+        /// <param name="sArray">需要拼接的数组</param>
+        /// <param name="code">字符编码</param>
+        /// <returns>拼接完成以后的字符串</returns>
+        //public static string CreateLinkStringUrlencode(Dictionary<string, string> dicArray, Encoding code)
+        //{
+        //    StringBuilder prestr = new StringBuilder();
+        //    foreach (KeyValuePair<string, string> temp in dicArray)
+        //    {
+        //        prestr.Append(temp.Key + "=" + HttpUtility.UrlEncode(temp.Value, code) + "&");
+        //    }
+
+        //    //去掉最後一個&字符
+        //    int nLen = prestr.Length;
+        //    prestr.Remove(nLen - 1, 1);
+
+        //    return prestr.ToString();
+        //}
+
+        /// <summary>
+        /// 获取文件的md5摘要
+        /// </summary>
+        /// <param name="sFile">文件流</param>
+        /// <returns>MD5摘要结果</returns>
+        public static string GetAbstractToMD5(Stream sFile)
+        {
+            MD5 md5 = new MD5CryptoServiceProvider();
+            byte[] result = md5.ComputeHash(sFile);
+            StringBuilder sb = new StringBuilder(32);
+            for (int i = 0; i < result.Length; i++)
+            {
+                sb.Append(result[i].ToString("x").PadLeft(2, '0'));
+            }
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// 获取文件的md5摘要
+        /// </summary>
+        /// <param name="dataFile">文件流</param>
+        /// <returns>MD5摘要结果</returns>
+        public static string GetAbstractToMD5(byte[] dataFile)
+        {
+            MD5 md5 = new MD5CryptoServiceProvider();
+            byte[] result = md5.ComputeHash(dataFile);
+            StringBuilder sb = new StringBuilder(32);
+            for (int i = 0; i < result.Length; i++)
+            {
+                sb.Append(result[i].ToString("x").PadLeft(2, '0'));
+            }
+            return sb.ToString();
+        }
+    }
+}