支付宝的接口调用很不方便,刚做好一个封装,实现了虚拟交易和实物交易。
解决方案中有三个项目以及NDoc生成的文档,简单的序列图:CommonAliPay,封装的支付宝接口。
 TestAli,asp.net的测试项目
TestCommonAliPay,Nunit的测试项目。
调用方法:
1、引入CommonAliPay.dll
2、实现支付宝服务接口的方法调用方式:
 AliPay ap = new AliPay();
 string key = "";//填写自己的key
 string partner = "";//填写自己的Partner
 StandardGoods bp = new StandardGoods("trade_create_by_buyer", partner, key, "MD5", "卡2", Guid.NewGuid().ToString(), 2.551m, 1, "hao_ding2000@yahoo.com.cn", "hao_ding2000@yahoo.com.cn"
 , "EMS", 25.00m, "BUYER_PAY","1");
 bp.Notify_Url = "http://203.86.79.185/ali/notify.aspx";
 ap.CreateStandardTrade("https://www.alipay.com/cooperate/gateway.do", bp, this);上面是通用的调用方式。
下面是只支持虚拟货物的方式:
 string key = "";//填写自己的key
 string partner = "";//填写自己的Partner
 AliPay ap = new AliPay();
 DigitalGoods bp = new DigitalGoods("create_digital_goods_trade_p", partner, key, "MD5", "卡2", Guid.NewGuid().ToString(), 2.551m, 1, "hao_ding2000@yahoo.com.cn", "hao_ding2000@yahoo.com.cn");
 bp.Notify_Url = "http://203.86.79.185/ali/notify.aspx";
 ap.CreateDigitalTrade("https://www.alipay.com/cooperate/gateway.do", bp, this);3、实现支付宝通知接口方法的调用(支持虚拟和实物):
protected void Page_Load(object sender, EventArgs e)
 {
 
 string key = "";//填写自己的key
 string partner = "";//填写自己的Partner
 AliPay ap = new AliPay();
 string notifyid = Request.Form["notify_id"];
 Verify v = new Verify("notify_verify", partner, notifyid);
 ap.WaitSellerSendGoods+=new AliPay.ProcessNotifyEventHandler(ap_WaitSellerSendGoods);
 ap.WaitBuyerPay += new AliPay.ProcessNotifyEventHandler(ap_WaitBuyerPay);
 ap.ProcessNotify(this, "https://www.alipay.com/cooperate/gateway.do",key,v, "utf-8");
 }
 void ap_WaitBuyerPay(object sender, NotifyEventArgs e)
 {
 // //加入自己的处理逻辑
 Log4net.log.Error("wait buyer pay fire");
 }
 
 private void ap_WaitSellerSendGoods(object sender, NotifyEventArgs e)
 {
 //加入自己的处理逻辑
 Log4net.log.Error("WaitSellerSendGoods fire");
 }支付宝的交易状态都被定义成了类似名称的事件。
部分源代码解析:
1、解析Forms集合到NotifyEventArgs类,因为后面此类的数据要用来做MD5Sign,所以所有值类型,不能存在初始值,如:int的0等。因此用Nullable范型。
 private NotifyEventArgs ParseNotify(NameValueCollection nv, object obj)
 {
 PropertyInfo[] propertyInfos = obj.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
 foreach (PropertyInfo pi in propertyInfos)
 {
 string v = nv.Get(pi.Name.ToLower());
 if (v != null)
 {
 if (pi.PropertyType == typeof(string))
 {
 pi.SetValue(obj, v, null);
 }
 else if (pi.PropertyType == typeof(int?))
 {
 pi.SetValue(obj, int.Parse(v), null);
 }
 else if (pi.PropertyType == typeof(decimal?))
 {
 pi.SetValue(obj, decimal.Parse(v), null);
 }
 else if (pi.PropertyType == typeof(DateTime?))
 {
 pi.SetValue(obj, DateTime.Parse(v), null);
 }
 else if (pi.PropertyType == typeof(bool))
 {
 pi.SetValue(obj, bool.Parse(v), null);
 }
 else
 {
 //转型失败会抛出异常
 pi.SetValue(obj, v, null);
 }
 }
 }
 return (NotifyEventArgs)obj;
 }
2、从类型中获取排序后的参数
 /**//// 
 /// 获取排序后的参数
 /// 
 /// 
 /// 
 private SortedList GetParam(object obj)
 {
 
 PropertyInfo[] propertyInfos = obj.GetType().GetProperties(BindingFlags.Public|BindingFlags.Instance); 
 SortedList sortedList = new SortedList(StringComparer.CurrentCultureIgnoreCase);
 foreach (PropertyInfo pi in propertyInfos)
 {
 if (pi.GetValue(obj, null) != null)
 {
 if (pi.Name == "Sign" || pi.Name == "Sign_Type")
 {
 continue;
 }
 sortedList.Add(pi.Name.ToLower(), pi.GetValue(obj, null).ToString());
 
 }
 }
 return sortedList;
 
 }3、从SortedList中产生参数
 private string GetUrlParam(SortedList sortedList,bool isEncode)
 {
 StringBuilder param = new StringBuilder();
 StringBuilder encodeParam = new StringBuilder();
 if (isEncode == false)
 {
 foreach (KeyValuePair kvp in sortedList)
 {
 string t = string.Format("{0}={1}", kvp.Key, kvp.Value);
 param.Append(t + "&");
 }
 return param.ToString().TrimEnd('&');
 }
 else
 {
 foreach (KeyValuePair kvp in sortedList)
 {
 string et = string.Format("{0}={1}", HttpUtility.UrlEncode(kvp.Key), HttpUtility.UrlEncode(kvp.Value));
 encodeParam.Append(et + "&");
 }
 return encodeParam.ToString().TrimEnd('&');
 }
 
 }