它現(xiàn)在這種支付方式比較多象網(wǎng)銀在線等使用的方法都是url驗(yàn)證，就是通過(guò)url參數(shù)和一個(gè)這些url參數(shù)的md5編碼來(lái)確認(rèn)這個(gè)連接的正確性，支付寶在你購(gòu)買(mǎi)成功后跳轉(zhuǎn)自定義連接的時(shí)候會(huì)傳2次過(guò)來(lái)，第一次是數(shù)據(jù)底層請(qǐng)求，第二次是web請(qǐng)求，而只有第一次有驗(yàn)證碼，這個(gè)只能通過(guò)記錄下來(lái)才看的到，因?yàn)閮纱握?qǐng)求間隔很小，如果光顯示的話最后的結(jié)果是被第二次覆蓋了的。所以在接收的時(shí)候就要設(shè)定接收條件，一種是沒(méi)有notify_type參數(shù)的，一種是有的。

???????? 我們先來(lái)看一下創(chuàng)建一個(gè)連接地址
t1=ConfigurationSettings.AppSettings["interface"];//支付接口,就是給的一個(gè)連接地址
????????????t2=ConfigurationSettings.AppSettings["account"];//支付寶帳戶你的帳戶
????????????t3=ConfigurationSettings.AppSettings["password"];//安全校驗(yàn)碼，設(shè)置的商家驗(yàn)證碼
????????????t4="images/logo_zfbsmall.gif";//按鈕圖片地址
????????????t5="test";//懸停說(shuō)明
????????????cmd="0001";//默認(rèn)
????????????subject="item";//商品名稱
????????????body="decrip";//描述
????????????order_no=;//定單號(hào)，用戶自己生成，方便自己管理????????????????prices=100;//價(jià)格0.01～50000.00
????????????rurl="http://www.xxx.com/";//商品展示網(wǎng)址
????????????types="1";//1：商品購(gòu)買(mǎi)2：服務(wù)購(gòu)買(mǎi)3：網(wǎng)絡(luò)拍賣(mài)4：捐贈(zèng)
????????????number="1";//購(gòu)買(mǎi)數(shù)量
????????????transport="3";//1：平郵2：快遞3：虛擬物品
????????????ordinary_fee="";//平郵運(yùn)費(fèi)
????????????express_fee="";//快遞運(yùn)費(fèi)
????????????readonlys="true";//交易信息是否只讀
????????????buyer_msg="";//買(mǎi)家給賣(mài)家的留言
????????????buyer="";//買(mǎi)家Email
????????????buyer_name="";//買(mǎi)家姓名
????????????buyer_address="";//買(mǎi)家地址
????????????buyer_zipcode="";//買(mǎi)家郵編
????????????buyer_tel="";//買(mǎi)家電話號(hào)碼
????????????buyer_mobile="";//買(mǎi)家手機(jī)號(hào)碼
????????????partner=ConfigurationSettings.AppSettings["partenid"];//合作伙伴ID,這個(gè)是固定的
上面就是要提供得基本信息，然后就是生成支付寶得連接，也就是給支付寶提供一條帶驗(yàn)證的購(gòu)買(mǎi)信息。
public?string?creatAlipayItemURL(string?t1,string?t2,string?t3,string?t4,string?t5,string?cmd,string?subject,string?body,string?order_no,string?prices,string?rurl,string?types,string?number,string?transport,string?ordinary_fee,string?express_fee,string?readonlys,string?buyer_msg,string?buyer,string?buyer_name,string?buyer_address,string?buyer_zipcode,string?buyer_tel,string?buyer_mobile,string?partner)
????????{
????????????string?itemURL,str2CreateAc,acCode;
????????????string?INTERFACE_URL,sellerEmail,keyCode,imgsrc,imgtitle,AlipayItemURL;
????????????//初始化各必要變量
????????????INTERFACE_URL=t1+t2;//支付接口
????????????sellerEmail=t2;//商戶支付寶賬戶（改成你自己的）
????????????keyCode=t3;//安全校驗(yàn)碼（改成你自己的）
????????????imgsrc=t4;//支付寶按鈕圖片
????????????imgtitle=t5;//按鈕懸停說(shuō)明

????????????str2CreateAc="cmd"?+?cmd?+?"subject"?+?subject;
????????????str2CreateAc=str2CreateAc?+?"body"?+?body;
????????????str2CreateAc=str2CreateAc?+?"order_no"?+?order_no;
????????????str2CreateAc=str2CreateAc?+?"price"?+?prices;
????????????//str2CreateAc=str2CreateAc?+?"url"?+?rurl;
????????????str2CreateAc=str2CreateAc?+?"type"?+?types;
????????????str2CreateAc=str2CreateAc?+?"number"?+?number;
????????????str2CreateAc=str2CreateAc?+?"transport"?+?transport;
????????????/*str2CreateAc=str2CreateAc?+?"ordinary_fee"?+?ordinary_fee;
????????????str2CreateAc=str2CreateAc?+?"express_fee"?+?express_fee;
????????????str2CreateAc=str2CreateAc?+?"readonly"?+?readonlys;
????????????str2CreateAc=str2CreateAc?+?"buyer_msg"?+?buyer_msg;*/
????????????str2CreateAc=str2CreateAc?+?"seller"?+?sellerEmail;
????????????/*str2CreateAc=str2CreateAc?+?"buyer"?+?buyer;
????????????str2CreateAc=str2CreateAc?+?"buyer_name"?+?buyer_name;
????????????str2CreateAc=str2CreateAc?+?"buyer_address"?+?buyer_address;
????????????str2CreateAc=str2CreateAc?+?"buyer_zipcode"?+?buyer_zipcode;
????????????str2CreateAc=str2CreateAc?+?"buyer_tel"?+?buyer_tel;
????????????str2CreateAc=str2CreateAc?+?"buyer_mobile"?+?buyer_mobile;*/
????????????str2CreateAc=str2CreateAc?+?"partner"?+?partner;
????????????str2CreateAc=str2CreateAc?+?keyCode;

????????????//acCode=FormsAuthentication.HashPasswordForStoringInConfigFile(str2CreateAc,"MD5");
????????????acCode=this.GetMD5(str2CreateAc,"gb2312");
????????????itemURL=INTERFACE_URL?+?"?cmd="?+?cmd;
????????????itemURL=itemURL?+?"&subject="?+?HttpUtility.UrlEncode(subject);
????????????itemURL=itemURL?+?"&body="?+?HttpUtility.UrlEncode(body);
????????????itemURL=itemURL?+?"&order_no="?+?order_no;
????????????itemURL=itemURL?+?"&price="?+?prices;
????????????//itemURL=itemURL?+?"&url="?+?rurl;
????????????itemURL=itemURL?+?"&type="?+?types;
????????????itemURL=itemURL?+?"&number="?+?number;
????????????itemURL=itemURL?+?"&transport="?+?transport;
????????????/*itemURL=itemURL?+?"&ordinary_fee="?+?ordinary_fee;
????????????itemURL=itemURL?+?"&express_fee="?+?express_fee;
????????????itemURL=itemURL?+?"&readonly="?+?readonlys;
????????????itemURL=itemURL?+?"&buyer_msg="?+?HttpUtility.UrlEncode(buyer_msg);
????????????itemURL=itemURL?+?"&buyer="?+?HttpUtility.UrlEncode(buyer);
????????????itemURL=itemURL?+?"&buyer_name="?+?HttpUtility.UrlEncode(buyer_name);
????????????itemURL=itemURL?+?"&buyer_address="?+?HttpUtility.UrlEncode(buyer_address);
????????????itemURL=itemURL?+?"&buyer_zipcode="?+?buyer_zipcode;
????????????itemURL=itemURL?+?"&buyer_tel="?+?buyer_tel;
????????????itemURL=itemURL?+?"&buyer_mobile="?+?buyer_mobile;*/
????????????itemURL=itemURL?+?"&partner="?+?partner;
????????????itemURL=itemURL?+?"&ac="?+?acCode;
????????????AlipayItemURL=itemURL;
????????????????????????return?AlipayItemURL;
????????}
這個(gè)函數(shù)就是返回生成的地址，里面注釋掉的看你自己需要可以添加進(jìn)去，然后就是md5碼的問(wèn)題，現(xiàn)在用默認(rèn)的md5生成程序?qū)χ形牡闹С种幌抻贕B2312，而支付寶使用的是GBK，雖然兩個(gè)編碼的內(nèi)容GBK兼容GB2312但是畢竟兩個(gè)編碼方式不同，所以會(huì)產(chǎn)生錯(cuò)誤，如果用英文或者數(shù)字不會(huì)有問(wèn)題。上面下載里面帶的一個(gè)md5.asp的算法支持中文。
??????? 現(xiàn)在已經(jīng)可以跳轉(zhuǎn)到支付寶的頁(yè)面了，而我們這邊就要自己記錄用戶的信息已經(jīng)生成的定單編號(hào)，這樣在支付寶返回信息的時(shí)候來(lái)查詢。在設(shè)定了返回地址后，我們就要看接收頁(yè)面了。
string?msg_id,order_no,gross,buyer_email,buyer_name,buyer_address,buyer_zipcode,buyer_tel,buyer_mobile,action,s_date,ac,notify_type;
????
????????????string?returnTxt;//返回給支付寶通知接口的結(jié)果
????????????string?alipayNotifyURL;//支付寶查詢接口URL
????????????string?myalipayEmail;//商戶的支付寶Email
????????????string?ResponseTxt="";
????

????????????returnTxt????????????=?"N";
????????????alipayNotifyURL????????=?ConfigurationSettings.AppSettings["interfaceback"];//支付寶查詢接口地址
????????????myalipayEmail????????=?ConfigurationSettings.AppSettings["account"];//填寫(xiě)您的支付寶帳號(hào)

????
????????????//檢查支付寶通知接口傳遞過(guò)來(lái)的參數(shù)是否合法
????????????msg_id????????????=?newop.DelStr(Request["msg_id"]);
????????????order_no????????=?newop.DelStr(Request["order_no"]);
????????????gross????????????=?newop.DelStr(Request["gross"]);
????????????buyer_email????????=?newop.DelStr(Request["buyer_email"]);
????????????buyer_name????????=?newop.DelStr(Request["buyer_name"]);
????????????buyer_address????=?newop.DelStr(Request["buyer_address"]);
????????????buyer_zipcode????=?newop.DelStr(Request["buyer_zipcode"]);
????????????buyer_tel????????=?newop.DelStr(Request["buyer_tel"]);
????????????buyer_mobile????=?newop.DelStr(Request["buyer_mobile"]);
????????????action????????????=?newop.DelStr(Request["action"]);
????????????s_date????????????=?newop.DelStr(Request["date"]);
????????????ac????????????????=?newop.DelStr(Request["ac"]);
????????????notify_type?????=?newop.DelStr(Request["notify_type"]);

????????????alipayNotifyURL????=?alipayNotifyURL?+?"msg_id="?+?msg_id?+?"&email="?+?myalipayEmail?+?"&order_no="?+?order_no;
????
????????????System.Net.WebClient?isClient=?new?System.Net.WebClient();
????????????Stream?isStream?=?isClient.OpenRead(alipayNotifyURL);
????????????StreamReader?isReader?=?new?StreamReader(isStream,System.Text.Encoding.GetEncoding("GB2312"));
????????????ResponseTxt?=?isReader.ReadToEnd();

if(action?==?"test")//測(cè)試商戶網(wǎng)站URL是否正確安裝
????????????{
????????????????returnTxt????=?"Y";
????????????}
????????????else?if((action=="sendOff")&&(msg_id!=""))//發(fā)貨通知
????????????{
????????????????returnTxt????????=?"N";
????????????????if((ResponseTxt?==?"true")||(ResponseTxt?==?"false"))
????????????????{
????????????????????//更新數(shù)據(jù)在商戶系統(tǒng)里的訂單數(shù)據(jù)；如果已經(jīng)發(fā)貨，則將returnTxt置為Y，否則為N
????????
????????????????}
????????????????else
????????????????{
????????????????????//非法數(shù)據(jù)，不做更新
????????????????????returnTxt="Error";
????????????????}
????????????}
????????????else?if((action=="sendOff")&&(notify_type=="web"))
????????????{
????????????????//檢查是否已經(jīng)付帳，并記錄????????????}
????????????else?if((action=="checkOut")&&(msg_id!=""))//交易結(jié)束通知
????????????{
????????????????returnTxt????=?"Y";
????????????????if((ResponseTxt=="true")||(ResponseTxt?==?"false"))
????????????????{
????????????????????//更新數(shù)據(jù)在商戶系統(tǒng)里的訂單數(shù)據(jù)；如果數(shù)據(jù)更新成功，則將returnTxt置為Y，否則為N
????????????????????//更新數(shù)據(jù)
????????????????????
//你的代碼，更新你這邊數(shù)據(jù)
????????????????????returnTxt=?"Y";
????????????????}
????????????????else
????????????????{
????????????????????//非法數(shù)據(jù)，不做更新
????????????????????returnTxt????=?"Error";
????????????????}????
????????????}
????????????else
????????????{
????????????????returnTxt="Error";
????????????}
????????????Response.Write(returnTxt); ?