asp.net core 微信公众号支付（扫码支付，H5支付，公众号支付，app支付）之3

//定义参数名
string _appId = "appId";
string _nonceStr = "nonceStr";
string _package = "package";
string _signType = "signType";
string _timeStamp = "timeStamp";
string _paySign = "paySign";

/// <summary>
/// 获取微信内置H5支付需要的信息，公众号支付返回的是个有序字典，利用字典的各个值调用jssdk获取微信内的公众号支付
/// </summary>
/// <param name="out_trade_no">订单号</param>
/// <param name="body">描述</param>
/// <param name="total_fee">总价</param>
/// <param name="ip">客户IP</param>
/// <param name="product_id">商品id</param>
/// <param name="openid">openid</param>
/// <returns></returns>
public SortedDictionary<string, string> GetWxGZHPayInfo(string out_trade_no, string body, string total_fee, string ip, string product_id, string openid = "")
{
//定义参数名
string _appId = "appId";
string _nonceStr = "nonceStr";
string _package = "package";
string _signType = "signType";
string _timeStamp = "timeStamp";
string _paySign = "paySign"; //构造返回参数字典
SortedDictionary<string, string> dicResult = new SortedDictionary<string, string>();
dicResult.Add(_appId, wxPayConfig.appid);
dicResult.Add(_timeStamp, Senparc.Weixin.Helpers.DateTimeHelper.GetWeixinDateTime(DateTime.Now)+ "");
dicResult.Add(_nonceStr, Senparc.Weixin.MP.TenPayLibV3.TenPayV3Util.GetNoncestr());
dicResult.Add(_package, "");
dicResult.Add(_signType, "MD5");
dicResult.Add(_paySign, ""); //构造请求参数
Senparc.Weixin.MP.TenPayLibV3.RequestHandler packageReqHandler = new Senparc.Weixin.MP.TenPayLibV3.RequestHandler(); #region 构造请求参数
packageReqHandler.SetParameter("appid", wxPayConfig.appid);//APPID
packageReqHandler.SetParameter("mch_id", wxPayConfig.mchid);//商户号
packageReqHandler.SetParameter("nonce_str", Senparc.Weixin.MP.TenPayLibV3.TenPayV3Util.GetNoncestr());//随机串
packageReqHandler.SetParameter("body", body);
packageReqHandler.SetParameter("out_trade_no", out_trade_no);//订单号
packageReqHandler.SetParameter("total_fee", (int)(Convert.ToDecimal(total_fee) * ) + ""); //金额,以分为单位
packageReqHandler.SetParameter("spbill_create_ip", ip);//IP
packageReqHandler.SetParameter("notify_url", wxPayConfig.notify_url); //回调地址
packageReqHandler.SetParameter("trade_type", "JSAPI");//公共号支付
packageReqHandler.SetParameter("product_id", product_id);//商品ID
packageReqHandler.SetParameter("openid", openid);//OPENID
packageReqHandler.SetParameter("sign", packageReqHandler.CreateMd5Sign("key", wxPayConfig.key));//商户API密钥（签名）
#endregion //将参数转为xml字符串
string data = packageReqHandler.ParseXML(); //发起post异步请求，获取返回的内容
var result = PostWithStringFile(wxPayConfig.api_url, data); Log.Info("【GetWxGZHPayInfo】订单：" + out_trade_no + ",请求得到的xml：" + result, "微信支付"); var res = System.Xml.Linq.XDocument.Parse(result);//解析xml，为了填充prepay_id参数和_paySign参数。
try
{
//填充prepay_id参数
string prepay_id = res.Element("xml").Element("prepay_id").Value;
Log.Info("【GetWxGZHPayInfo】订单：" + out_trade_no + ",请求得到的prepay_id：" + prepay_id, "微信支付");
dicResult[_package] = "prepay_id=" + prepay_id; //获取MD5签名字符串，注意顺序不能错
string _stringSignTemp = "appId=" + dicResult[_appId] + "&nonceStr=" + dicResult[_nonceStr] + "&package=" + dicResult[_package] + "&signType=" + dicResult[_signType] + "&timeStamp=" + dicResult[_timeStamp] + "&key=" + wxPayConfig.key;
Log.Info("【GetWxGZHPayInfo】_stringSignTemp=" + _stringSignTemp, "微信支付"); //填充_paySign参数
string _sign = Senparc.Weixin.Helpers.EncryptHelper.GetMD5(_stringSignTemp);
dicResult[_paySign] = _sign;
return dicResult;
}
catch (Exception ex)
{
Log.Info($"【GetWxGZHPayInfo】订单：{out_trade_no },异常:{ ex.ToString()}", "微信支付");
return dicResult;
}
}