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公众号微信支付
1、概要
公众号是以微信用户的一个联系人形式存在的，支付是微信服务号的核心一环。
本篇主要介绍微信支付这一功能，避免大家再跳微信支付的坑。
1.1 关于Magicodes.WeChat.SDK
MAGICODES.WECHAT.SDK为心莱团队封装的轻量级微信SDK，现已全部开源，开源库地址为：https://github.com/xin-lai/Magicodes.WeChat.SDK
更多介绍，请关注后续博客。
2、微信公众号支付
用户已有商城网址，用户通过微信消息、微信扫描二维码、微信自定义菜单等操作在微信内打开网页时，可以调用微信支付完成下单购买流程。
2.1 支付流程
2.1.1 微信网页支付流程
备注：实际流程其实非常简单
① 用户支付之前，程序生成订单并调用统一下单API()
② 微信系统返回预付单信息
③ 根据信息生成JSAPI页面调用的支付参数并签名，jssdk调用
④ 用户支付，jsapi向微信系统发送请求
⑤ 微信系统返回支付结果给用户，同时异步发送结果给程序后台（程序没有收到通知，可以调用查询接口）
⑥ 支付完成，用户界面根据结果做相关页面跳转或提示处理，程序后台根据通知做订单状态变更等逻辑处理。
2.1.2 刷卡支付
后续更新
2.1.3 扫码支付
后续更新
2.1.4 app支付
后续更新
2.2 注意事项
2.3 开发实践
2.3.1 开发配置
1、设置测试目录
在微信公众平台设置。支付测试状态下，设置测试目录，测试人的微信号添加到白名单，发起支付的页面目录必须与设置的精确匹配。并将支付链接发到对应的公众号会话窗口中才能正常发起支付测试。注意正式目录一定不能与测试目录设置成一样，否则支付会出错。
友情提示：如果是使用测试目录的地址，一定要记得把个人测试微信号添加到白名单。
2、设置正式支付目录
根据图中栏目顺序进入修改栏目，勾选JSAPI网页支付开通该权限，并配置好支付授权目录，该目录必须是发起支付的页面的精确目录，子目录下无法正常调用支付。具体界面如图：
友情提示：注意红色框框里面的说明，一不小心会很容易进坑的。
2.3.2 开发程序
直接看代码吧
微信支付业务类
1 /// <summary> 2 /// 微信支付接口，官方API：https://mp.weixin.qq.com/paymch/readtemplate?t=mp/business/course2_tmpl&lang=zh_CN&token=25857919#4 3 4 /// </summary> 5 public class TenPayV3 : PayBase 6 7 { 8 public UnifiedorderResult Unifiedorder(UnifiedorderRequest model) 9 10 { 11 12 var url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; 13 14 15 16 17 18 UnifiedorderResult result = null; 19 20 21 22 model.AppId = WeiChatConfig.AppId; 23 24 model.MchId = PayConfig.MchId; 25 26 if (model.NotifyUrl == null) 27 28 model.NotifyUrl = PayConfig.Notify; 29 30 Dictionary<string, string> dictionary = PayUtil.GetAuthors<UnifiedorderRequest>(model); 31 32 model.Sign = PayUtil.CreateMd5Sign(dictionary, PayConfig.TenPayKey);//生成Sign 33 34 Dictionary<string, string> dict = PayUtil.GetAuthors<UnifiedorderRequest>(model); 35 36 result = PostXML<UnifiedorderResult>(url, model); 37 38 return result; 39 40 } 41 42 43 44 /// <summary> 45 46 /// 订单查询接口 47 48 /// </summary> 49 50 /// <param name="data"></param> 51 52 /// <returns></returns> 53 54 public static string OrderQuery(string data) 55 56 { 57 58 var urlFormat = "https://api.mch.weixin.qq.com/pay/orderquery"; 59 60 61 62 var formDataBytes = data =http://www.mamicode.com/= null ? new byte[0] : Encoding.UTF8.GetBytes(data); 63 64 using (MemoryStream ms = new MemoryStream()) 65 66 { 67 68 ms.Write(formDataBytes, 0, formDataBytes.Length); 69 70 ms.Seek(0, SeekOrigin.Begin);//设置指针读取位置 71 72 return RequestUtility.HttpPost(urlFormat, null, ms); 73 74 } 75 76 } 77 78 79 80 /// <summary> 81 82 /// 关闭订单接口 83 84 /// </summary> 85 86 /// <param name="data">关闭订单需要post的xml数据</param> 87 88 /// <returns></returns> 89 90 public static string CloseOrder(string data) 91 92 { 93 94 var urlFormat = "https://api.mch.weixin.qq.com/pay/closeorder"; 95 96 97 98 var formDataBytes = data =http://www.mamicode.com/= null ? new byte[0] : Encoding.UTF8.GetBytes(data); 99 100 using (MemoryStream ms = new MemoryStream())101 102 {103 104 ms.Write(formDataBytes, 0, formDataBytes.Length);105 106 ms.Seek(0, SeekOrigin.Begin);//设置指针读取位置107 108 return RequestUtility.HttpPost(urlFormat, null, ms);109 110 }111 112 }113 114 115 116 117 118 119 120 /// <summary>121 122 /// 退款查询接口123 124 /// </summary>125 126 /// <param name="data"></param>127 128 /// <returns></returns>129 130 public static string RefundQuery(string data)131 132 {133 134 var urlFormat = "https://api.mch.weixin.qq.com/pay/refundquery";135 136 137 138 var formDataBytes = data =http://www.mamicode.com/= null ? new byte[0] : Encoding.UTF8.GetBytes(data);139 140 using (MemoryStream ms = new MemoryStream())141 142 {143 144 ms.Write(formDataBytes, 0, formDataBytes.Length);145 146 ms.Seek(0, SeekOrigin.Begin);//设置指针读取位置147 148 return RequestUtility.HttpPost(urlFormat, null, ms);149 150 }151 152 }153 154 155 156 /// <summary>157 158 /// 对账单接口159 160 /// </summary>161 162 /// <param name="data"></param>163 164 /// <returns></returns>165 166 public static string DownloadBill(string data)167 168 {169 170 var urlFormat = "https://api.mch.weixin.qq.com/pay/downloadbill";171 172 173 174 var formDataBytes = data =http://www.mamicode.com/= null ? new byte[0] : Encoding.UTF8.GetBytes(data);175 176 using (MemoryStream ms = new MemoryStream())177 178 {179 180 ms.Write(formDataBytes, 0, formDataBytes.Length);181 182 ms.Seek(0, SeekOrigin.Begin);//设置指针读取位置183 184 return RequestUtility.HttpPost(urlFormat, null, ms);185 186 }187 188 }189 190 191 192 /// <summary>193 194 /// 短链接转换接口195 196 /// </summary>197 198 /// <param name="data"></param>199 200 /// <returns></returns>201 202 public static string ShortUrl(string data)203 204 {205 206 var urlFormat = "https://api.mch.weixin.qq.com/tools/shorturl";207 208 209 210 var formDataBytes = data =http://www.mamicode.com/= null ? new byte[0] : Encoding.UTF8.GetBytes(data);211 212 using (MemoryStream ms = new MemoryStream())213 214 {215 216 ms.Write(formDataBytes, 0, formDataBytes.Length);217 218 ms.Seek(0, SeekOrigin.Begin);//设置指针读取位置219 220 return RequestUtility.HttpPost(urlFormat, null, ms);221 222 }223 224 }225 226 /// <summary>227 228 ///229 230 /// </summary>231 232 /// <param name="page"></param>233 234 /// <returns></returns>235 236 public NotifyResult Notify(Stream inputStream)237 238 {239 240 NotifyResult result = null;241 242 string data =http://www.mamicode.com/ PayUtil.PostInput(inputStream);243 244 result = XmlHelper.DeserializeObject<NotifyResult>(data);245 246 return result;247 248 }249 250 /// <summary>251 252 /// 通知并返回处理XML253 254 /// </summary>255 256 /// <param name="inputStream">输入流</param>257 258 /// <param name="successAction">成功处理逻辑回调函数</param>259 260 /// <param name="failAction">失败处理逻辑回调函数</param>261 262 /// <param name="successMsg">成功返回消息</param>263 264 /// <param name="errorMsg">失败返回消息</param>265 266 /// <param name="isSync">是否异步执行相关处理逻辑</param>267 268 /// <returns></returns>269 270 public string NotifyAndReurnResult(Stream inputStream, Action<NotifyResult> successAction, Action<NotifyResult> failAction, string successMsg = "OK", string errorMsg = "FAIL", bool isSync = true)271 272 {273 274 var result = Notify(inputStream);275 276 var request = new NotifyRequest();277 278 request.ReturnCode = "FAIL";279 280 if (result.IsSuccess())281 282 {283 284 if (isSync)285 286 Task.Run(() => successAction(result));287 288 else289 290 successAction.Invoke(result);291 292 //交易成功293 294 request.ReturnCode = "SUCCESS";295 296 request.ReturnMsg = successMsg;297 298 return XmlHelper.SerializeObject(request);299 300 }301 302 else303 304 {305 306 if (isSync)307 308 Task.Run(() => failAction(result));309 310 else311 312 failAction.Invoke(result);313 314 request.ReturnMsg = errorMsg;315 316 return XmlHelper.SerializeObject(request);317 318 }319 320 }321 322 }323 324 }
把返回参数和请求参数，序列化成对象，方便我们在编写我们本身逻辑的时候调用
1 [XmlRoot("xml")] 2 [Serializable()] 3 public class Result : PayResult 4 { 5 /// <summary> 6 /// 微信分配的公众账号ID 7 /// </summary> 8 [XmlElement("appid")] 9 public string AppId { get; set; } 10 /// <summary> 11 /// 微信支付分配的商户号 12 /// </summary> 13 [XmlElement("mch_id")] 14 public string Mch_Id { get; set; } 15 /// <summary> 16 /// 微信支付分配的终端设备号 17 /// </summary> 18 [XmlElement("device_info")] 19 public string Device_Info { get; set; } 20 /// <summary> 21 /// 随机字符串，不长于32 位 22 /// </summary> 23 [XmlElement("nonce_str")] 24 public string NonceStr { get; set; } 25 /// <summary> 26 /// 签名 27 /// </summary> 28 [XmlElement("sign")] 29 public string Sign { get; set; } 30 /// <summary> 31 /// SUCCESS/FAIL 32 /// </summary> 33 [XmlElement("result_code")] 34 public string ResultCode { get; set; } 35 [XmlElement("err_code")] 36 public string ErrCode { get; set; } 37 [XmlElement("err_code_des")] 38 public string ErrCodeDes { get; set; } 39 } 40 41 [XmlRoot("xml")] 42 [Serializable()] 43 public class UnifiedorderResult : Result 44 { 45 /// <summary> 46 /// 交易类型:JSAPI、NATIVE、APP 47 /// </summary> 48 [XmlElement("trade_type")] 49 public string TradeType { get; set; } 50 /// <summary> 51 /// 微信生成的预支付ID，用于后续接口调用中使用 52 /// </summary> 53 [XmlElement("prepay_id")] 54 public string PrepayId { get; set; } 55 /// <summary> 56 /// trade_type为NATIVE时有返回，此参数可直接生成二维码展示出来进行扫码支付 57 /// </summary> 58 [XmlElement("code_url")] 59 public string CodeUrl { get; set; } 60 } 61 62 63 [XmlRoot("xml")] 64 [Serializable()] 65 public class UnifiedorderRequest 66 { 67 /// <summary> 68 /// OpenId 69 /// </summary> 70 [XmlElement("openid")] 71 public string OpenId { get; set; } 72 /// <summary> 73 /// 【不用填写】微信开放平台审核通过的应用APPID 74 /// </summary> 75 [XmlElement("appid")] 76 public string AppId { get; set; } 77 /// <summary> 78 /// 【不用填写】微信支付分配的商户号 79 /// </summary> 80 [XmlElement("mch_id")] 81 public string MchId { get; set; } 82 83 /// <summary> 84 /// 终端设备号(门店号或收银设备ID)，默认请传"WEB" 85 /// </summary> 86 [XmlElement("device_info")] 87 public string DeviceInfo { get; set; } 88 /// <summary> 89 /// 随机字符串，不长于32位 90 /// </summary> 91 [XmlElement("nonce_str")] 92 public string NonceStr { get; set; } 93 /// <summary> 94 /// 【不用填写】签名 95 /// </summary> 96 [XmlElement("sign")] 97 public string Sign { get; set; } 98 /// <summary> 99 /// 商品描述交易字段格式根据不同的应用场景按照以下格式： APP——需传入应用市场上的APP名字-实际商品名称，天天爱消除-游戏充值。100 /// </summary>101 [XmlElement("body")]102 public string Body { get; set; }103 /// <summary>104 /// 商品名称明细列表105 /// </summary>106 [XmlElement("detail")]107 public string Detail { get; set; }108 /// <summary>109 /// 附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据110 /// </summary>111 [XmlElement("attach")]112 public string Attach { get; set; }113 /// <summary>114 /// 商户系统内部的订单号,32个字符内、可包含字母, 其他说明见商户订单号115 /// </summary>116 [XmlElement("out_trade_no")]117 public string OutTradeNo { get; set; }118 /// <summary>119 /// 符合ISO 4217标准的三位字母代码，默认人民币：CNY120 /// </summary>121 [XmlElement("fee_type")]122 public string FeeType { get; set; }123 /// <summary>124 /// 订单总金额，单位为分125 /// </summary>126 [XmlElement("total_fee")]127 public string TotalFee { get; set; }128 /// <summary>129 /// 用户端实际ip130 /// </summary>131 [XmlElement("spbill_create_ip")]132 public string SpbillCreateIp { get; set; }133 /// <summary>134 /// 订单生成时间，格式为yyyyMMddHHmmss，如2009年12月25日9点10分10秒表示为20091225091010。135 /// </summary>136 [XmlElement("time_start")]137 public string TimeStart { get; set; }138 /// <summary>139 /// 订单失效时间，格式为yyyyMMddHHmmss，如2009年12月27日9点10分10秒表示为20091227091010140 /// </summary>141 [XmlElement("time_expire")]142 public string TimeExpire { get; set; }143 /// <summary>144 /// 商品标记，代金券或立减优惠功能的参数，说明详见代金券或立减优惠145 /// </summary>146 [XmlElement("goods_tag")]147 public string GoodsTag { get; set; }148 /// <summary>149 /// 【不用填写】接收微信支付异步通知回调地址，通知url必须为直接可访问的url，不能携带参数150 /// </summary>151 [XmlElement("notify_url")]152 public string NotifyUrl { get; set; }153 /// <summary>154 /// 支付类型（JSAPI，NATIVE，APP）公众号内支付填JSAPI155 /// </summary>156 [XmlElement("trade_type")]157 public string TradeType { get; set; }158 /// <summary>159 /// no_credit--指定不能使用信用卡支付160 /// </summary>161 [XmlElement("limit_pay")]162 public string LimitPay { get; set; }163 }164 [XmlRoot("xml")]165 [Serializable()]166 public class NotifyResult : PayResult167 {168 /// <summary>169 /// 微信分配的公众账号ID（企业号corpid即为此appId）170 /// </summary>171 [XmlElement("appid")]172 public string AppId { get; set; }173 /// <summary>174 /// 微信支付分配的商户号175 /// </summary>176 [XmlElement("mch_id")]177 public string MchId { get; set; }178 /// <summary>179 /// 微信支付分配的终端设备号180 /// </summary>181 [XmlElement("device_info")]182 public string DeviceInfo { get; set; }183 /// <summary>184 /// 随机字符串，不长于32位185 /// </summary>186 [XmlElement("nonce_str")]187 public string NonceStr { get; set; }188 /// <summary>189 /// 签名190 /// </summary>191 [XmlElement("sign")]192 public string Sign { get; set; }193 /// <summary>194 /// 业务结果，SUCCESS/FAIL195 /// </summary>196 [XmlElement("result_code")]197 public string ResultCode { get; set; }198 /// <summary>199 /// 错误返回的信息描述200 /// </summary>201 [XmlElement("err_code")]202 public string ErrCode { get; set; }203 /// <summary>204 /// 错误返回的信息描述205 /// </summary>206 [XmlElement("err_code_des")]207 public string ErrCodeDes { get; set; }208 /// <summary>209 /// 用户在商户appid下的唯一标识210 /// </summary>211 [XmlElement("openid")]212 public string OpenId { get; set; }213 /// <summary>214 /// 用户是否关注公众账号，Y-关注，N-未关注，仅在公众账号类型支付有效215 /// </summary>216 [XmlElement("is_subscribe")]217 public string IsSubscribe { get; set; }218 /// <summary>219 /// 交易类型，JSAPI、NATIVE、APP220 /// </summary>221 [XmlElement("trade_type")]222 public string TradeType { get; set; }223 /// <summary>224 /// 银行类型，采用字符串类型的银行标识，银行类型见银行列表225 /// </summary>226 [XmlElement("bank_type")]227 public string BankType { get; set; }228 /// <summary>229 /// 订单总金额，单位为分230 /// </summary>231 [XmlElement("total_fee")]232 public string TotalFee { get; set; }233 /// <summary>234 /// 应结订单金额=订单金额-非充值代金券金额，应结订单金额<=订单金额235 /// </summary>236 [XmlElement("settlement_total_fee")]237 public string SettlementTotalFee { get; set; }238 /// <summary>239 /// 货币类型，符合ISO4217标准的三位字母代码，默认人民币：CNY，其他值列表详见货币类型240 /// </summary>241 [XmlElement("fee_type")]242 public string FeeType { get; set; }243 /// <summary>244 /// 货币类型现金支付金额订单现金支付金额，详见支付金额245 /// </summary>246 [XmlElement("cash_fee")]247 public string CashFee { get; set; }248 /// <summary>249 /// 货币类型，符合ISO4217标准的三位字母代码，默认人民币：CNY，其他值列表详见货币类型250 /// </summary>251 [XmlElement("cash_fee_type")]252 public string CashFeeType { get; set; }253 /// <summary>254 /// 代金券金额<=订单金额，订单金额-代金券金额=现金支付金额，详见支付金额]255 /// </summary>256 [XmlElement("coupon_fee")]257 public string CouponFee { get; set; }258 /// <summary>259 /// 代金券使用数量260 /// </summary>261 [XmlElement("coupon_count")]262 public string CouponCount { get; set; }263 /// <summary>264 /// CASH--充值代金券 NO_CASH---非充值代金券 订单使用代金券时有返回（取值：CASH、NO_CASH）。$n为下标,从0开始编号，举例：coupon_type_$0265 /// </summary>266 [XmlElement("coupon_type_$n")]267 public string CouponTypeN { get; set; }268 /// <summary>269 /// 代金券ID,$n为下标，从0开始编号270 /// </summary>271 [XmlElement("coupon_id_$n")]272 public string CouponIdN { get; set; }273 /// <summary>274 /// 单个代金券支付金额,$n为下标，从0开始编号275 /// </summary>276 [XmlElement("coupon_fee_$n")]277 public string CouponFeeN { get; set; }278 /// <summary>279 /// 微信支付订单号280 /// </summary>281 [XmlElement("transaction_id")]282 public string TransactionId { get; set; }283 /// <summary>284 /// 商户系统的订单号，与请求一致285 /// </summary>286 [XmlElement("out_trade_no")]287 public string OutTradeNo { get; set; }288 /// <summary>289 /// 商家数据包，原样返回290 /// </summary>291 [XmlElement("attach")]292 public string Attach { get; set; }293 /// <summary>294 /// 支付完成时间，格式为yyyyMMddHHmmss，如2009年12月25日9点10分10秒表示为20091225091010。其他详见时间规则295 /// </summary>296 [XmlElement("time_end")]297 public string TimeEnd { get; set; }298 }299 [XmlRoot("xml")]300 [Serializable()]301 public class NotifyRequest302 {303 /// <summary>304 /// SUCCESS/FAIL SUCCESS表示商户接收通知成功并校验成功305 /// </summary>306 [XmlElement("return_code")]307 public string ReturnCode { get; set; }308 /// <summary>309 /// 返回信息，如非空，为错误原因：签名失败 参数格式校验错误310 /// </summary>311 [XmlElement("return_msg")]312 public string ReturnMsg { get; set; }313 }
这些地方是获取微信支付的配置信息，appid，machid，密钥等信息。由于我们项目本身涉及到了多租户功能，所以Key是租户Id，这里通过Key获取不能租户的配置信息，如果不要实现多租户，默认不填写就OK，然后我们也可以通过把配置信息封装成一个对象写死在这里。具体源码可以去http:githup.com/xin-lai下载。全部功能已开源。
1 /// <summary> 2 3 /// POST提交请求，返回ApiResult对象 4 5 /// </summary> 6 7 /// <typeparam name="T">ApiResult对象</typeparam> 8 9 /// <param name="url">请求地址</param>10 11 /// <param name="obj">提交的数据对象</param>12 13 /// <returns>ApiResult对象</returns>14 15 protected T PostXML<T>(string url, object obj, Func<string, string> serializeStrFunc = null) where T : PayResult16 17 {18 19 var wr = new WeChatApiWebRequestHelper();20 21 string resultStr = null;22 23 var result = wr.HttpPost<T>(url, obj, out resultStr, serializeStrFunc, inputDataType: WebRequestDataTypes.XML, outDataType: WebRequestDataTypes.XML);24 25 if (result != null)26 27 {28 29 result.DetailResult = resultStr;30 31 }32 33 return result;34 35 }36 37 /// <summary>38 39 /// POST提交请求，带证书，返回ApiResult对象40 41 /// </summary>42 43 /// <typeparam name="T">ApiResult对象</typeparam>44 45 /// <param name="url">请求地址</param>46 47 /// <param name="obj">提交的数据对象</param>48 49 /// <returns>ApiResult对象</returns>50 51 protected T PostXML<T>(string url, object obj, X509Certificate2 cer, Func<string, string> serializeStrFunc = null) where T : PayResult52 53 {54 55 var wr = new WeChatApiWebRequestHelper();56 57 string resultStr = null;58 59 var result = wr.HttpPost<T>(url, obj,cer, out resultStr, serializeStrFunc, inputDataType: WebRequestDataTypes.XML, outDataType: WebRequestDataTypes.XML);60 61 if (result != null)62 63 {64 65 result.DetailResult = resultStr;66 67 }68 69 return result;70 71 }72 73 }
PayUtiy类，封装了一些公共方法
1 public static class PayUtil 2 3 { 4 5 /// <summary> 6 7 /// 随机生成Noncestr 8 9 /// </summary> 10 11 /// <returns></returns> 12 13 public static string GetNoncestr() 14 15 { 16 17 Random random = new Random(); 18 19 return MD5UtilHelper.GetMD5(random.Next(1000).ToString(), "GBK"); 20 21 } 22 23 /// <summary> 24 25 /// 根据当前系统时间加随机序列来生成订单号 26 27 /// </summary> 28 29 /// <returns>订单号</returns> 30 31 public static string GenerateOutTradeNo() 32 33 { 34 35 var ran = new Random(); 36 37 return string.Format("{0}{1}", UnixStamp(), ran.Next(999)); 38 39 } 40 41 /// <summary> 42 43 /// 获取时间戳 44 45 /// </summary> 46 47 /// <returns></returns> 48 49 public static string GetTimestamp() 50 51 { 52 53 TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0); 54 55 return Convert.ToInt64(ts.TotalSeconds).ToString(); 56 57 } 58 59 60 61 /// <summary> 62 63 /// 对字符串进行URL编码 64 65 /// </summary> 66 67 /// <param name="instr"></param> 68 69 /// <param name="charset"></param> 70 71 /// <returns></returns> 72 73 public static string UrlEncode(string instr, string charset) 74 75 { 76 77 //return instr; 78 79 if (instr == null || instr.Trim() == "") 80 81 return ""; 82 83 else 84 85 { 86 87 string res; 88 89 90 91 try 92 93 { 94 95 res = System.Web.HttpUtility.UrlEncode(instr, Encoding.GetEncoding(charset)); 96 97 98 99 }100 101 catch (Exception ex)102 103 {104 105 res = System.Web.HttpUtility.UrlEncode(instr, Encoding.GetEncoding("GB2312"));106 107 }108 109 110 111 112 113 return res;114 115 }116 117 }118 119 120 121 /// <summary>122 123 /// 对字符串进行URL解码124 125 /// </summary>126 127 /// <param name="instr"></param>128 129 /// <param name="charset"></param>130 131 /// <returns></returns>132 133 public static string UrlDecode(string instr, string charset)134 135 {136 137 if (instr == null || instr.Trim() == "")138 139 return "";140 141 else142 143 {144 145 string res;146 147 148 149 try150 151 {152 153 res = System.Web.HttpUtility.UrlDecode(instr, Encoding.GetEncoding(charset));154 155 156 157 }158 159 catch (Exception ex)160 161 {162 163 res = System.Web.HttpUtility.UrlDecode(instr, Encoding.GetEncoding("GB2312"));164 165 }166 167 168 169 170 171 return res;172 173 174 175 }176 177 }178 179 180 181 182 183 /// <summary>184 185 /// 取时间戳生成随即数,替换交易单号中的后10位流水号186 187 /// </summary>188 189 /// <returns></returns>190 191 public static UInt32 UnixStamp()192 193 {194 195 TimeSpan ts = DateTime.Now - TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));196 197 return Convert.ToUInt32(ts.TotalSeconds);198 199 }200 201 /// <summary>202 203 /// 取随机数204 205 /// </summary>206 207 /// <param name="length"></param>208 209 /// <returns></returns>210 211 public static string BuildRandomStr(int length)212 213 {214 215 Random rand = new Random();216 217 218 219 int num = rand.Next();220 221 222 223 string str = num.ToString();224 225 226 227 if (str.Length > length)228 229 {230 231 str = str.Substring(0, length);232 233 }234 235 else if (str.Length < length)236 237 {238 239 int n = length - str.Length;240 241 while (n > 0)242 243 {244 245 str.Insert(0, "0");246 247 n--;248 249 }250 251 }252 253 254 255 return str;256 257 }258 259 /// <summary>260 261 /// 循环获取一个实体类每个字段的XmlAttribute属性的值262 263 /// </summary>264 265 /// <typeparam name="T"></typeparam>266 267 /// <returns></returns>268 269 public static Dictionary<string, string> GetAuthors<T>(T model)270 271 {272 273 Dictionary<string, string> _dict = new Dictionary<string, string>();274 275 276 277 Type type = model.GetType(); //获取类型278 279 280 281 PropertyInfo[] props = typeof(T).GetProperties();282 283 foreach (PropertyInfo prop in props)284 285 {286 287 object[] attrs = prop.GetCustomAttributes(true);288 289 foreach (object attr in attrs)290 291 {292 293 XmlElementAttribute authAttr = attr as XmlElementAttribute;294 295 if (authAttr != null)296 297 {298 299 string auth = authAttr.ElementName;300 301 302 303 PropertyInfo property = type.GetProperty(prop.Name);304 305 string value = http://www.mamicode.com/(string)property.GetValue(model, null); //获取属性值306 307 308 309 _dict.Add(auth, value);310 311 }312 313 }314 315 }316 317 return _dict;318 319 }320 321 322 323 /// <summary>324 325 /// 创建md5摘要,规则是:按参数名称a-z排序,遇到空值的参数不参加签名326 327 /// </summary>328 329 /// <param name="key">参数名</param>330 331 /// <param name="value">参数值</param>332 333 /// key和value通常用于填充最后一组参数334 335 /// <returns></returns>336 337 public static string CreateMd5Sign(Dictionary<string, string> dict, string value)338 339 {340 341 ArrayList akeys = new ArrayList();342 343 foreach (var x in dict)344 345 {346 347 if ("sign".CompareTo(x.Key) == 0)348 349 continue;350 351 akeys.Add(x.Key);352 353 }354 355 StringBuilder sb = new StringBuilder();356 357 akeys.Sort();358 359 360 361 foreach (string k in akeys)362 363 {364 365 string v = (string)dict[k];366 367 if (null != v && "".CompareTo(v) != 0368 369 && "sign".CompareTo(k) != 0 && "key".CompareTo(k) != 0)370 371 {372 373 sb.Append(k + "=" + v + "&");374 375 }376 377 }378 379 sb.Append("key=" + value);380 381 var md5 = MD5.Create();382 383 var bs = md5.ComputeHash(Encoding.UTF8.GetBytes(sb.ToString()));384 385 var sbuilder = new StringBuilder();386 387 foreach (byte b in bs)388 389 {390 391 sbuilder.Append(b.ToString("x2"));392 393 }394 395 //所有字符转为大写396 397 return sbuilder.ToString().ToUpper();398 399 }400 401 /// <summary>402 403 /// 接收post数据404 405 /// </summary>406 407 /// <param name="context"></param>408 409 /// <returns></returns>410 411 public static string PostInput(Stream stream)412 413 {414 415 int count = 0;416 417 byte[] buffer = new byte[1024];418 419 StringBuilder builder = new StringBuilder();420 421 while ((count = stream.Read(buffer, 0, 1024)) > 0)422 423 {424 425 builder.Append(Encoding.UTF8.GetString(buffer, 0, count));426 427 }428 429 return builder.ToString();430 431 }432 433 }434 435 PayResult类，请求参数基类436 437 [XmlRoot("xml")]438 439 [Serializable()]440 441 public class PayResult442 443 {444 445 public virtual bool IsSuccess()446 447 {448 449 return this.ReturnCode == "SUCCESS";450 451 }452 453 /// <summary>454 455 /// 返回状态码456 457 /// SUCCESS/FAIL，此字段是通信标识，非交易标识，交易是否成功需要查看result_code来判断458 459 /// </summary>460 461 [XmlElement("return_code")]462 463 public string ReturnCode { get; set; }464 465 466 467 /// <summary>468 469 /// 返回信息，返回信息，如非空，为错误原因，签名失败，参数格式校验错误470 471 /// </summary>472 473 [XmlElement("return_msg")]474 475 public string Message { get; set; }476 477 478 479 /// <summary>480 481 /// 详细内容482 483 /// </summary>484 485 [XmlIgnore]486 487 public string DetailResult { get; set; }488 489 }
支付完成之后，异步回掉的处理
1 /// <summary> 2 3 /// 微信支付回调地址 4 5 /// </summary> 6 7 /// <param name="tenantId"></param> 8 9 /// <returns></returns>10 11 [Route("PayNotify/{tenantId}")]12 13 [AllowAnonymous]14 15 public ActionResult PayNotify(int tenantId)16 17 {18 19 Action<NotifyResult> successAction = (result) =>20 21 {22 23 using (var context = new AppDbContext())24 25 {26 27 var order = context.Order_Infos.FirstOrDefault(o => o.Code == result.OutTradeNo);28 29 if (null != order)30 31 {32 33 //修改订单状态34 35 order.State = EnumOrderStatus.Overhang;36 37 order.ThirdPayType = EnumThirdPayType.WX;38 39 order.PaymentOn = DateTime.Now;40 41 order.UpdateTime = DateTime.Now;42 43 context.SaveChanges();44 45 46 47 48 49 }50 51 else52 53 {54 55 logger.Log(LoggerLevels.Debug, "Order information does not exist!");56 57 }58 59 }60 61 //此处编写成功处理逻辑62 63 logger.Log(LoggerLevels.Debug, "Success: JSON:" + JsonConvert.SerializeObject(result));64 65 };66 67 Action<NotifyResult> failAction = (result) =>68 69 {70 71 //此处编写失败处理逻辑72 73 logger.Log(LoggerLevels.Debug, "Fail: JSON:" + JsonConvert.SerializeObject(result));74 75 };76 77 return Content(WeiChatApisContext.Current.TenPayV3Api.NotifyAndReurnResult(Request.InputStream, successAction, failAction));78 79 }
当前是mvc项目，所以我建了一个webapi控制器，路由地址是http：//xx.com/api/ PayNotify/{tenantId}，tenantId是租户id，非必填，但是如果没有，要记得把路由里面的参数也去掉。这个地址就是本文前面配置的回调地址，一定要配置正确
然后是调用微信的统一下单的方法
1 /// <summary> 2 3 /// 微信支付（统一下单） 4 5 /// </summary> 6 7 /// <param name="id"></param> 8 9 /// <returns></returns>10 11 [HttpGet]12 13 [Route("Pay/{id}")]14 15 public IHttpActionResult WechatPay(Guid id)16 17 {18 19 try20 21 {22 23 //查询订单24 25 var order = db.Order_Infos.SingleOrDefault(o => o.Id == id && o.OpenId == WeiChatApplicationContext.Current.WeiChatUser.OpenId);26 27 if (null == order)28 29 return BadRequest("订单信息不存在");30 31 #region 统一下单32 33 var model = new UnifiedorderRequest();34 35 model.OpenId = WeiChatApplicationContext.Current.WeiChatUser.OpenId;36 37 model.SpbillCreateIp = "8.8.8.8";38 39 model.OutTradeNo = order.Code;40 41 model.TotalFee = Convert.ToInt32((order.TotalPrice + order.Shipping) * 100).ToString();42 43 model.NonceStr = PayUtil.GetNoncestr();44 45 model.TradeType = "JSAPI";46 47 model.Body = "购买商品";48 49 model.DeviceInfo = "WEB";50 51 var result = WeiChatApisContext.Current.TenPayV3Api.Unifiedorder(model);52 53 54 55 Dictionary<string, string> _dict = new Dictionary<string, string>();56 57 _dict.Add("appId", result.AppId);58 59 _dict.Add("timeStamp", PayUtil.GetTimestamp());60 61 _dict.Add("nonceStr", result.NonceStr);62 63 _dict.Add("package", "prepay_id=" + result.PrepayId);64 65 _dict.Add("signType", "MD5");66 67 _dict.Add("paySign", PayUtil.CreateMd5Sign(_dict, WeiChatConfigManager.Current.GetPayConfig().TenPayKey));68 69 #endregion70 71 return Ok(_dict);72 73 }74 75 catch (Exception ex)76 77 {78 79 log.Log(LoggerLevels.Error, "WechatPay：" + ex.Message);80 81 }82 83 return BadRequest("操作失败，请联系管理员!");84 85 }
这也是一个webapi或mvc控制器，给前台页面调用，作用是通过微信的统一下单方法获取微信的预付单，然后再生成一个供给jssdk调用的对象。
页面上的jssdk调用方法
1 function onBridgeReady(data) { 2 3 WeixinJSBridge.invoke(‘getBrandWCPayRequest‘, data, function (res) { 4 5 is_suc = true; 6 7 if (res.err_msg == "get_brand_wcpay_request:ok") { //支付成功后 8 9 location.href = http://www.mamicode.com/‘@Url.TenantAction("PaySuccess", "Personal")‘;10 11 } else {12 13 14 15 }16 17 });18 19 }20 21 function CallPay(data) {22 23 if (typeof WeixinJSBridge == "undefined") {24 25 if (document.addEventListener) {26 27 document.addEventListener(‘WeixinJSBridgeReady‘, onBridgeReady(data), false);28 29 } else if (document.attachEvent) {30 31 document.attachEvent(‘WeixinJSBridgeReady‘, onBridgeReady(data));32 33 document.attachEvent(‘onWeixinJSBridgeReady‘, onBridgeReady(data));34 35 }36 37 } else {38 39 onBridgeReady(data);40 41 }42 43 }44 45 46 47 this.toPay = function () {48 49 wc.restApi.get({50 51 isBlockUI: false,52 53 url: ‘/api/MyOrder/Pay/‘ + _orderid,54 55 success: function (result) {56 57 CallPay(ko.toJS(result));58 59 }60 61 });62 63 }
注意这里，这里先是通过ajax请求到我们前面所写的微信统一下单那个action，然后获取到返回的那个对象
关于ko.toJS(),这是knockout里面的方法，作用是把result处理成json对象。
好了，到此微信支付已经处理完了，详细代码请移步http://github.com/xin-lai下载最新源码。
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