微信支付步骤：
1.小程序后台下单 生成订单号
//获取商品价格
decimal shop_money = Convert.ToDecimal(shop_info.Rows[0]["money"]);
//获取商品名称
string title = shop_info.Rows[0]["title"].ToString();
//计算订单金额
decimal money = shop_money * Convert.ToDecimal(shop_num);
//获取当前时间的时间戳
DateTime time = DateTime.Now;
double set_time = TimeHelper.ConvertDateTimeToS(time);
//获取商品id
int id = shop_id;
//获取订单状态
int pay_state = Convert.ToInt32(0);
Random ran = new Random();
//订单号
string num = DateTime.Now.ToString("yyMMddHHmmssfff") + ran.Next(1000, 9999).ToString();
//获取商品类型
int shop_type = Convert.ToInt32(shop_info.Rows[0]["shop_type"]);
//获取商品组合个数
int gro_num = Convert.ToInt32(shop_info.Rows[0]["gro_num"]);
//获取商品名称
//添加订单信息
2.调用自定义方法 微信下单
/// <summary>
/// 微信下单
/// </summary>
/// <param name="title">商品名称</param>
/// <param name="num">订单号</param>
/// <param name="money">订单金额</param>
/// <param name="user_id">用户id</param>
/// <returns></returns>
public DataTable wechat_payment(string title, string num, decimal money, int user_id)
{
string signType = "";
string nonceStr = "";
string timeStamp = "";
string package = "";
string appId = "";
string paySign = "";
DataTable aa = new DataTable();//可以给表创建一个名字，tb
try
{
//根据id查询用户openid
BLL.wx_yxt_user wx_yxt_user = new BLL.wx_yxt_user();
DataTable user_info = wx_yxt_user.get_user_info(user_id);
string openid =user_info.Rows[0]["wx_openid"].ToString(); //;
//附加数据
var _attach = "支付";
//商品描述
var _body = title;
//随机字符串
random_number random = new random_number();
var _nonce_str = random.Generate_nonce(15);
//回调地址
var _notify_url = wechatConfig.wx_asyn_call_url;
//商户订单号
var _out_trade_no = num;
//终端IP
var _spbill_create_ip = GetWebClientIp();
//订单金额
var _total_fee = Convert.ToDouble(money);//元为单位
var _trade_type = "JSAPI";//交易类型
//设备号
var _scene_info = $@"{{""h5_info"": {{""type"":""Wap"",""wap_url"": ""{_notify_url}"",""wap_name"": ""{_body}""}}}}";
//交易起始时间
var _time_start = DateTime.Now.ToString("yyyyMMddHHmmss");
//交易结束时间
var _time_expire = DateTime.Now.AddHours(1).ToString("yyyyMMddHHmmss");
var sign_type = "MD5";
//下单
var pre_order_httpResult = UnifiedOrder(_appid, _attach, _body, _mch_id, _nonce_str, _notify_url, _out_trade_no, _spbill_create_ip, _total_fee,
_trade_type, _scene_info, _time_start, _time_expire, sign_type, openid);
var pre_order_resultStr = XElement.Parse(pre_order_httpResult);
var pre_order_result_code = pre_order_resultStr.Element("return_code").Value;
var pre_order_result_msg = pre_order_resultStr.Element("return_msg").Value;
aa.Columns.Add("signType", typeof(System.String));//类型是可以变换的，比如System.Int32,System.Double..
aa.Columns.Add("nonce_str", typeof(System.String));
aa.Columns.Add("timeStamp", typeof(System.String));
aa.Columns.Add("package", typeof(System.String));
aa.Columns.Add("appId", typeof(System.String));
aa.Columns.Add("paySign", typeof(System.String));
if (pre_order_result_code == "SUCCESS")
{
signType = "MD5";
nonceStr = pre_order_resultStr.Element("nonce_str").Value;
///秒
TimeSpan t = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
string ts = Convert.ToInt64(t.TotalSeconds).ToString();
timeStamp = ts;
package = pre_order_resultStr.Element("prepay_id").Value;
appId = pre_order_resultStr.Element("appid").Value;
var stringADict = new Dictionary<string, string>();
stringADict.Add("signType", signType);
stringADict.Add("nonceStr", nonceStr);
stringADict.Add("timeStamp", timeStamp);
stringADict.Add("package", "prepay_id=" + package);
stringADict.Add("appId", appId);
paySign = Sign(stringADict, _partnerKey);
DataRow row = aa.NewRow();
row["signType"] = signType;
row["nonce_str"] = nonceStr;
row["timeStamp"] = timeStamp;
row["package"] = package;
row["appId"] = appId;
row["paySign"] = paySign;
aa.Rows.Add(row);
}
}
catch (Exception ex)
{
NLogHelper.Error("WeChatIndex", ex);
}
return aa;
}
/// <summary>
/// 下单
/// </summary>
/// <param name="appid">公众账号ID</param>
/// <param name="attach">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</param>
/// <param name="body">String(32) 商品描述 商品或支付单简要描</param>
/// <param name="mch_id">商户号</param>
/// <param name="nonce_str">随机字符串</param>
/// <param name="notify_url">接收微信支付异步通知回调地址,不可带参,与下面的Notify对应，开发者可自定义其他url地址 </param>
/// <param name="out_trade_no">商户系统内部的订单号,32个字符内、可包含字母</param>
/// <param name="spbill_create_ip">终端ip</param>
/// <param name="total_fee">收钱总额 分为单位 前台传过来后需要处理成分</param>
/// <param name="trade_type">交易类型H5支付的交易类型为MWEB</param>
/// <param name="scene_info">场景信息 WAP网站应用{"h5_info": {"type":"Wap","wap_url": "https://pay.qq.com","wap_name": "腾讯充值"}}</param>
/// <param name="time_start">交易起始时间</param>
/// <param name="time_expire">交易结束时间</param>
/// <returns></returns>
static string UnifiedOrder(string appid, string attach, string body, string mch_id, string nonce_str, string notify_url, string out_trade_no,
string spbill_create_ip, double total_fee, string trade_type, string scene_info, string time_start, string time_expire, string sign_type, string openid)
{
var pre_order_httpResult = "";
try
{
var stringADict = new Dictionary<string, string>();
stringADict.Add("appid", appid);
stringADict.Add("attach", attach);
stringADict.Add("body", body);
stringADict.Add("mch_id", mch_id);
stringADict.Add("nonce_str", nonce_str);
stringADict.Add("notify_url", notify_url);
stringADict.Add("out_trade_no", out_trade_no);
stringADict.Add("openid", openid);
stringADict.Add("spbill_create_ip", spbill_create_ip);
stringADict.Add("total_fee", Math.Round(Convert.ToDecimal(total_fee) * 100, 0).ToString());//元转分
stringADict.Add("trade_type", trade_type);
stringADict.Add("scene_info", scene_info);
stringADict.Add("time_start", time_start);
stringADict.Add("time_expire", time_expire);
stringADict.Add("sign_type", sign_type);
var sign = Sign(stringADict, _partnerKey);//生成签名字符串
//组合xml内容
StringBuilder strBuilder = new StringBuilder();
strBuilder.Append("<xml>");
strBuilder.Append($"<appid>{appid}</appid>");//公众号id
strBuilder.Append($"<attach>{attach}</attach>");//附加数据
strBuilder.Append($"<body>{body}</body>");//商品描述
strBuilder.Append($"<mch_id>{mch_id}</mch_id>");//商户号
strBuilder.Append($"<nonce_str>{nonce_str}</nonce_str>");//随机字符串
strBuilder.Append($"<notify_url>{notify_url}</notify_url>");//接收微信支付异步通知回调地址,不可带参,与下面的Notify对应，开发者可自定义其他url地址
strBuilder.Append($"<out_trade_no>{out_trade_no}</out_trade_no>");//商户系统内部的订单号,32个字符内、可包含字母
strBuilder.Append($"<openid>{openid}</openid>");
strBuilder.Append($"<spbill_create_ip>{spbill_create_ip}</spbill_create_ip>");//终端ip
strBuilder.Append($"<total_fee>{Math.Round(Convert.ToDecimal(total_fee) * 100, 0).ToString()}</total_fee>");//收钱总额 分为单位 前台传过来后需要处理成分
strBuilder.Append($"<trade_type>{trade_type}</trade_type>");//交易类型H5支付的交易类型为MWEB
strBuilder.Append($"<scene_info>{scene_info}</scene_info>");
strBuilder.Append($"<time_start>{time_start}</time_start>");//交易起始时间
strBuilder.Append($"<time_expire>{time_expire}</time_expire>");//交易结束时间
strBuilder.Append($"<sign>{sign}</sign>");
strBuilder.Append($"<sign_type>{sign_type}</sign_type>");
strBuilder.Append("</xml>");
//var url = _pre_order_url + "/sandboxnew/pay/unifiedorder";//沙箱
var url = "https://api.mch.weixin.qq.com/" + "pay/unifiedorder";
pre_order_httpResult = HttpPostRequestXml(url, strBuilder);
}
catch (Exception ex)
{
NLogHelper.Error("UnifiedOrder", ex);
}
return pre_order_httpResult;
}
3.向微信发送post xml文件请求 返回成功失败提示
/// <summary>
/// 发送post xml文件请求
/// </summary>
/// <param name="Url"></param>
/// <param name="strBuilder"></param>
/// <returns></returns>
static string HttpPostRequestXml(string Url, StringBuilder strBuilder)
{
string result = string.Empty;
try
{
string data = strBuilder.ToString();
//进行utf-8编码
var encoding = Encoding.GetEncoding("utf-8");
byte[] buffer = encoding.GetBytes(data);
//根据webURL创建HttpWebRequest对象
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Method = "post";
//request.Headers.Add("charset:utf-8");
request.ContentLength = buffer.Length;
request.ContentType = "text/xml";
StreamWriter myWriter = null;
try
{
myWriter = new StreamWriter(request.GetRequestStream());
myWriter.Write(data);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
finally
{
myWriter.Close();
}
//读取服务器返回的信息
HttpWebResponse objResponse = (HttpWebResponse)request.GetResponse();
using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
{
result = sr.ReadToEnd();
}
}
catch (Exception ex)
{
NLogHelper.Error("HttpPostRequestXml", ex);
}
return result;
}
自定义方法 获取终端IP地址
/// <summary>
/// 获取终端IP地址
/// </summary>
/// <returns></returns>
public static string GetWebClientIp()
{
string userIP = "";
try
{
if (System.Web.HttpContext.Current == null
|| System.Web.HttpContext.Current.Request == null
|| System.Web.HttpContext.Current.Request.ServerVariables == null)
return "";
string CustomerIP = "";
//CDN加速后取到的IP simone 090805
CustomerIP = System.Web.HttpContext.Current.Request.Headers["Cdn-Src-Ip"];
if (!string.IsNullOrEmpty(CustomerIP))
{
return CustomerIP;
}
CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (!String.IsNullOrEmpty(CustomerIP))
{
return CustomerIP;
}
if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
{
CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (CustomerIP == null)
CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
else
{
CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
if (string.Compare(CustomerIP, "unknown", true) == 0)
return System.Web.HttpContext.Current.Request.UserHostAddress;
return CustomerIP;
}
catch { }
return userIP;
}
自定义方法 生成签名
/// <summary>
/// 生成签名
/// 签名在线验证工具：
/// http://mch.weixin.qq.com/wiki/tools/signverify/
/// </summary>
/// <param name="stringADict">参与签名生成的参数列表</param>
/// <param name="partnerKey">商家私钥</param>
/// <returns></returns>
public static string Sign(IDictionary<string, string> stringADict, string partnerKey)
{
var sign = "";
try
{
var sb = new StringBuilder();
foreach (var sA in stringADict.OrderBy(x => x.Key))//参数名ASCII码从小到大排序（字典序）；
{
if (string.IsNullOrEmpty(sA.Value)) continue;//参数的值为空不参与签名；
if (string.Compare(sA.Key, "sign", true) == 0) continue; // 参数中为签名的项，不参加计算
sb.Append(sA.Key).Append("=").Append(sA.Value).Append("&");
}
var string1 = sb.ToString();
string1 = string1.Remove(string1.Length - 1, 1);
sb.Append("key=").Append(partnerKey);//在stringA最后拼接上key=(API密钥的值)得到stringSignTemp字符串
var stringSignTemp = sb.ToString();
// var sign = MD5Encrypt(stringSignTemp, "UTF-8").ToUpper();//对stringSignTemp进行MD5运算，再将得到的字符串所有字符转换为大写，得到sign值signValue。
sign = MD5Encrypt(stringSignTemp, "UTF-8").ToUpper();//对stringSignTemp进行MD5运算，再将得到的字符串所有字符转换为大写，得到sign值signValue。
}
catch (Exception ex)
{
NLogHelper.Error("Sign", ex);
}
return sign;
}
自定义方法 MD5加密
/// <summary>
/// 用MD5加密字符串
/// </summary>
/// <param name="password">待加密的字符串</param>
/// <returns></returns>
public static string MD5Encrypt(string password, string encoding)
{
MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
byte[] data = md5Hasher.ComputeHash(Encoding.UTF8.GetBytes(password));
StringBuilder sBuilder = new StringBuilder();
for (int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString("x2"));
}
return sBuilder.ToString();
}