微信小程序支付C#后端源码
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2022-05-13 23:36:49
使用的是MVC .NET Framework4 微信小程序支付 小程序端源码 MVC项目发布前的配置 ......
1 using system;
2 using system.collections.generic;
3 using system.linq;
4 using system.text;
5 using system.web;
6 using system.web.mvc;
7 using system.io;
8 using system.security.cryptography;
9 using system.text;
10 using system.xml;
11 using newtonsoft.json;
12 using newtonsoft.json.linq;
13 namespace mvc_vue.controllers
14 {
15 public class wxcontroller : controller
16 {
17 //
18 // get: /wx/
19
20 public actionresult index()
21 {
22 return view();
23 }
24 //所需值
25 public static string _appid = "wxd930ea5d5a258f4f";
26 public static string _mch_id = "10000100";
27 public static string _key = "192006250b4c09247ec02edce69f6a2d";
28
29 //模拟wx统一下单 openid(前台获取)
30 public string getda(string openid)
31 {
32 return getprepay_id(_appid, "shanghaifendian", "monixiaofei", _mch_id, getrandomstring(30), "http://www.weixin.qq.com/wxpay/pay.php", openid, getrandomtime(), 1);
33
34 }
35
36
37
38 //微信统一下单获取prepay_id & 再次签名返回数据
39 private static string getprepay_id(string appid, string attach, string body, string mch_id, string nonce_str, string notify_url, string openid, string bookingno, int total_fee)
40 {
41 var url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信统一下单请求地址
42 string stra = "appid=" + appid + "&attach=" + attach + "&body=" + body + "&mch_id=" + mch_id + "&nonce_str=" + nonce_str + "¬ify_url=" + notify_url + "&openid=" + openid + "&out_trade_no=" + bookingno + "&spbill_create_ip=61.50.221.43&total_fee=" + total_fee + "&trade_type=jsapi";
43 string strk = stra + "&key="+_key; //key为商户平台设置的密钥key(假)
44 string strmd5 = md5(strk).toupper();//md5签名
45
46 //string strhash=hmacsha256("sha256",strmd5).toupper(); //签名方式只需一种(md5 或 hmacsha256 【支付文档需仔细看】)
47
48 //签名
49 var formdata = "<xml>";
50 formdata += "<appid>" + appid + "</appid>";//appid
51 formdata += "<attach>" + attach + "</attach>"; //附加数据(描述)
52 formdata += "<body>" + body + "</body>";//商品描述
53 formdata += "<mch_id>" + mch_id + "</mch_id>";//商户号
54 formdata += "<nonce_str>" + nonce_str + "</nonce_str>";//随机字符串，不长于32位。
55 formdata += "<notify_url>" + notify_url + "</notify_url>";//通知地址
56 formdata += "<openid>" + openid + "</openid>";//openid
57 formdata += "<out_trade_no>" + bookingno + "</out_trade_no>";//商户订单号 --待
58 formdata += "<spbill_create_ip>61.50.221.43</spbill_create_ip>";//终端ip --用户ip
59 formdata += "<total_fee>" + total_fee + "</total_fee>";//支付金额单位为（分）
60 formdata += "<trade_type>jsapi</trade_type>";//交易类型(jsapi--公众号支付)
61 formdata += "<sign>" + strmd5 + "</sign>"; //签名
62 formdata += "</xml>";
63
64
65
66 //请求数据
67 var getdata = sendpost(url, formdata);
68
69 //获取xml数据
70 xmldocument doc = new xmldocument();
71 doc.loadxml(getdata);
72 //xml格式转json
73 string json = newtonsoft.json.jsonconvert.serializexmlnode(doc);
74
75
76
77 jobject jo = (jobject)jsonconvert.deserializeobject(json);
78 string prepay_id = jo["xml"]["prepay_id"]["#cdata-section"].tostring();
79
80 //时间戳
81 string _time = gettime().tostring();
82
83 //再次签名返回数据至小程序
84 string strb = "appid=" + appid + "&noncestr=" + nonce_str + "&package=prepay_id=" + prepay_id + "&signtype=md5×tamp=" + _time + "&key="_key;
85
86 wx w = new wx();
87 w.timestamp = _time;
88 w.noncestr = nonce_str;
89 w.package = "prepay_id=" + prepay_id;
90 w.paysign = md5(strb).toupper(); ;
91 w.signtype = "md5";
92
93 //向小程序发送json数据
94 return jsonconvert.serializeobject(w);
95 }
96
97 /// <summary>
98 /// 生成随机串
99 /// </summary>
100 /// <param name="length">字符串长度</param>
101 /// <returns></returns>
102 private static string getrandomstring(int length)
103 {
104 const string key = "abcdefghjklmnpqrstuvwxyz23456789";
105 if (length < 1)
106 return string.empty;
107
108 random rnd = new random();
109 byte[] buffer = new byte[8];
110
111 ulong bit = 31;
112 ulong result = 0;
113 int index = 0;
114 stringbuilder sb = new stringbuilder((length / 5 + 1) * 5);
115
116 while (sb.length < length)
117 {
118 rnd.nextbytes(buffer);
119
120 buffer[5] = buffer[6] = buffer[7] = 0x00;
121 result = bitconverter.touint64(buffer, 0);
122
123 while (result > 0 && sb.length < length)
124 {
125 index = (int)(bit & result);
126 sb.append(key[index]);
127 result = result >> 5;
128 }
129 }
130 return sb.tostring();
131 }
132
133 /// <summary>
134 /// 获取时间戳
135 /// </summary>
136 /// <returns></returns>
137 private static long gettime()
138 {
139 timespan cha = (datetime.now - timezone.currenttimezone.tolocaltime(new system.datetime(1970, 1, 1)));
140 long t = (long)cha.totalseconds;
141 return t;
142 }
143
144
145 /// <summary>
146 /// md5签名方法
147 /// </summary>
148 /// <param name="inputtext">加密参数</param>
149 /// <returns></returns>
150 private static string md5(string inputtext)
151 {
152 md5 md5 = new md5cryptoserviceprovider();
153 byte[] fromdata = system.text.encoding.utf8.getbytes(inputtext);
154 byte[] targetdata = md5.computehash(fromdata);
155 string byte2string = null;
156
157 for (int i = 0; i < targetdata.length; i++)
158 {
159 byte2string += targetdata[i].tostring("x2");
160 }
161
162 return byte2string;
163 }
164 /// <summary>
165 /// hmac-sha256签名方式
166 /// </summary>
167 /// <param name="message"></param>
168 /// <param name="secret"></param>
169 /// <returns></returns>
170 private static string hmacsha256(string message, string secret)
171 {
172 secret = secret ?? "";
173 var encoding = new system.text.utf8encoding();
174 byte[] keybyte = encoding.getbytes(secret);
175 byte[] messagebytes = encoding.getbytes(message);
176 using (var hmacsha256 = new hmacsha256(keybyte))
177 {
178 byte[] hashmessage = hmacsha256.computehash(messagebytes);
179 return convert.tobase64string(hashmessage);
180 }
181 }
182
183 /// <summary>
184 /// wx统一下单请求数据
185 /// </summary>
186 /// <param name="url">请求地址</param>
187 /// <param name="urlargs">参数</param>
188 /// <returns></returns>
189 private static string sendpost(string url, string urlargs)
190 {
191
192 system.net.webclient wcient = new system.net.webclient();
193 wcient.headers.add("content-type", "application/x-www-form-urlencoded");
194 byte[] postdata = system.text.encoding.ascii.getbytes("body=" + urlargs);
195
196 byte[] responsedata = wcient.uploaddata(url, "post", postdata);
197
198 string returnstr = system.text.encoding.utf8.getstring(responsedata);//返回接受的数据
199 return returnstr;202 }
203
204 /// <summary>
205 /// 生成订单号
206 /// </summary>
207 /// <returns></returns>
208 private static string getrandomtime()
209 {
210 random rd = new random();//用于生成随机数
211 string datestr = datetime.now.tostring("yyyymmddhhmmssmm");//日期
212 string str = datestr + rd.next(10000).tostring().padleft(4, '0');//带日期的随机数
213 return str;
214 }
215
216 }
217 }
使用的是mvc .net framework4