微信支付步驟：
1.小程序后台下單 生成訂單號
//獲取商品價格
decimal shop_money = Convert.ToDecimal(shop_info.Rows[0]["money"]);
//獲取商品名稱
string title = shop_info.Rows[0]["title"].ToString();
//計算訂單金額
decimal money = shop_money * Convert.ToDecimal(shop_num);
//獲取當前時間的時間戳
DateTime time = DateTime.Now;
double set_time = TimeHelper.ConvertDateTimeToS(time);
//獲取商品id
int id = shop_id;
//獲取訂單狀態
int pay_state = Convert.ToInt32(0);
Random ran = new Random();
//訂單號
string num = DateTime.Now.ToString("yyMMddHHmmssfff") + ran.Next(1000, 9999).ToString();
//獲取商品類型
int shop_type = Convert.ToInt32(shop_info.Rows[0]["shop_type"]);
//獲取商品組合個數
int gro_num = Convert.ToInt32(shop_info.Rows[0]["gro_num"]);
//獲取商品名稱
//添加訂單信息
2.調用自定義方法 微信下單
/// <summary>
/// 微信下單
/// </summary>
/// <param name="title">商品名稱</param>
/// <param name="num">訂單號</param>
/// <param name="money">訂單金額</param>
/// <param name="user_id">用戶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();//可以給表創建一個名字，tb
try
{
//根據id查詢用戶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(); //;
//附加數據
var _attach = "支付";
//商品描述
var _body = title;
//隨機字符串
random_number random = new random_number();
var _nonce_str = random.Generate_nonce(15);
//回調地址
var _notify_url = wechatConfig.wx_asyn_call_url;
//商戶訂單號
var _out_trade_no = num;
//終端IP
var _spbill_create_ip = GetWebClientIp();
//訂單金額
var _total_fee = Convert.ToDouble(money);//元為單位
var _trade_type = "JSAPI";//交易類型
//設備號
var _scene_info = $@"{{""h5_info"": {{""type"":""Wap"",""wap_url"": ""{_notify_url}"",""wap_name"": ""{_body}""}}}}";
//交易起始時間
var _time_start = DateTime.Now.ToString("yyyyMMddHHmmss");
//交易結束時間
var _time_expire = DateTime.Now.AddHours(1).ToString("yyyyMMddHHmmss");
var sign_type = "MD5";
//下單
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));//類型是可以變換的，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>
/// 下單
/// </summary>
/// <param name="appid">公眾賬號ID</param>
/// <param name="attach">附加數據，在查詢API和支付通知中原樣返回，該字段主要用於商戶攜帶訂單的自定義數據</param>
/// <param name="body">String(32) 商品描述 商品或支付單簡要描</param>
/// <param name="mch_id">商戶號</param>
/// <param name="nonce_str">隨機字符串</param>
/// <param name="notify_url">接收微信支付異步通知回調地址,不可帶參,與下面的Notify對應，開發者可自定義其他url地址 </param>
/// <param name="out_trade_no">商戶系統內部的訂單號,32個字符內、可包含字母</param>
/// <param name="spbill_create_ip">終端ip</param>
/// <param name="total_fee">收錢總額 分為單位 前台傳過來后需要處理成分</param>
/// <param name="trade_type">交易類型H5支付的交易類型為MWEB</param>
/// <param name="scene_info">場景信息 WAP網站應用{"h5_info": {"type":"Wap","wap_url": "https://pay.qq.com","wap_name": "騰訊充值"}}</param>
/// <param name="time_start">交易起始時間</param>
/// <param name="time_expire">交易結束時間</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());//元轉分
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);//生成簽名字符串
//組合xml內容
StringBuilder strBuilder = new StringBuilder();
strBuilder.Append("<xml>");
strBuilder.Append($"<appid>{appid}</appid>");//公眾號id
strBuilder.Append($"<attach>{attach}</attach>");//附加數據
strBuilder.Append($"<body>{body}</body>");//商品描述
strBuilder.Append($"<mch_id>{mch_id}</mch_id>");//商戶號
strBuilder.Append($"<nonce_str>{nonce_str}</nonce_str>");//隨機字符串
strBuilder.Append($"<notify_url>{notify_url}</notify_url>");//接收微信支付異步通知回調地址,不可帶參,與下面的Notify對應，開發者可自定義其他url地址
strBuilder.Append($"<out_trade_no>{out_trade_no}</out_trade_no>");//商戶系統內部的訂單號,32個字符內、可包含字母
strBuilder.Append($"<openid>{openid}</openid>");
strBuilder.Append($"<spbill_create_ip>{spbill_create_ip}</spbill_create_ip>");//終端ip
strBuilder.Append($"<total_fee>{Math.Round(Convert.ToDecimal(total_fee) * 100, 0).ToString()}</total_fee>");//收錢總額 分為單位 前台傳過來后需要處理成分
strBuilder.Append($"<trade_type>{trade_type}</trade_type>");//交易類型H5支付的交易類型為MWEB
strBuilder.Append($"<scene_info>{scene_info}</scene_info>");
strBuilder.Append($"<time_start>{time_start}</time_start>");//交易起始時間
strBuilder.Append($"<time_expire>{time_expire}</time_expire>");//交易結束時間
strBuilder.Append($"<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.向微信發送post xml文件請求 返回成功失敗提示
/// <summary>
/// 發送post xml文件請求
/// </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();
//進行utf-8編碼
var encoding = Encoding.GetEncoding("utf-8");
byte[] buffer = encoding.GetBytes(data);
//根據webURL創建HttpWebRequest對象
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();
}
//讀取服務器返回的信息
HttpWebResponse objResponse = (HttpWebResponse)request.GetResponse();
using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
{
result = sr.ReadToEnd();
}
}
catch (Exception ex)
{
NLogHelper.Error("HttpPostRequestXml", ex);
}
return result;
}
自定義方法 獲取終端IP地址
/// <summary>
/// 獲取終端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;
}
自定義方法 生成簽名
/// <summary>
/// 生成簽名
/// 簽名在線驗證工具：
/// http://mch.weixin.qq.com/wiki/tools/signverify/
/// </summary>
/// <param name="stringADict">參與簽名生成的參數列表</param>
/// <param name="partnerKey">商家私鑰</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))//參數名ASCII碼從小到大排序（字典序）；
{
if (string.IsNullOrEmpty(sA.Value)) continue;//參數的值為空不參與簽名；
if (string.Compare(sA.Key, "sign", true) == 0) continue; // 參數中為簽名的項，不參加計算
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密鑰的值)得到stringSignTemp字符串
var stringSignTemp = sb.ToString();
// var sign = MD5Encrypt(stringSignTemp, "UTF-8").ToUpper();//對stringSignTemp進行MD5運算，再將得到的字符串所有字符轉換為大寫，得到sign值signValue。
sign = MD5Encrypt(stringSignTemp, "UTF-8").ToUpper();//對stringSignTemp進行MD5運算，再將得到的字符串所有字符轉換為大寫，得到sign值signValue。
}
catch (Exception ex)
{
NLogHelper.Error("Sign", ex);
}
return sign;
}
自定義方法 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();
}