提示------------------幾個狀態沒有加判斷--------如:微信返回訂單號不存在，微信系統異常。。。。
c#webapi建議前端輪番查詢訂單狀態
#region 查詢掃碼訂單狀態
/// <summary>
/// 查詢掃碼支付狀態
/// </summary>
/// <param name="out_trade_no">支付訂單號</param>
/// <returns></returns>
[HttpGet]
public ResponseMessage PayMent_Result(string out_trade_no)
{
if (out_trade_no != null)
{
PayMent pay = new PayMent();
OrderDetail detail = pay.geidingdan(out_trade_no);
if (detail.trade_state == "SUCCESS")//支付成功
{
try
{
自己的業務邏輯（數據庫等等操作）
}
catch (Exception ex)
{
return new ResponseMessage { Code = -1};//系統異常
}
return new ResponseMessage { Code = 1 };
}
else if (detail.trade_state == "USERPAYING")//用戶支付中
{
return new ResponseMessage { Code = 3 };
//return "3";
}
else if (detail.trade_state == "NOTPAY")//未支付
{
return new ResponseMessage { Code = 2 };
// return "2";
}
else if (detail.trade_state == "PAYERROR")//支付失敗
{
return new ResponseMessage { Code = 4 };
//return "4"; ;
}
else if (detail.err_code == "ORDERNOTEXIST")
{
return new ResponseMessage { Code = -1, Message = detail.err_code_des }; //
}
else if (detail.err_code == "SYSTEMERROR")
{
return new ResponseMessage { Code = -1, Message = detail.err_code_des }; //
}
else {
return new ResponseMessage { Code = 0 }; //其他狀態
}
}
return new ResponseMessage { Code = -2 }; //支付訂單號不能爲空
}
#endregion
#region 返回前端使用的code_url
-----自己定義API接口
-----調用NATIVEPayMent 方法傳入方法的參數，判斷返回結果如果爲""說明微信統一下單失敗了，可以在統一下單返回結果寫入日誌文件，查看失敗原因。
#endregion
----------ENDAPI---------------------------------------------------------------------------------------------
/// <summary>
/// 微信掃碼支付
/// </summary>
/// <param name="appid">公衆號ID</param>
/// <param name="boby">商品描述</param>
/// <param name="mch_id">商戶號</param>
/// <param name="spbill_create_ip">終端IP</param>
/// <param name="total_fee">金額</param>
/// <param name="out_trade_no">商戶訂單號</param>
/// <param name="paysignkey">證書密匙</param>
/// <param name="product_id">二維碼中包含的商品ID</param>
/// <returns></returns>
public string NATIVEPayMent (string boby, string spbill_create_ip, Double total_fee, string out_trade_no, string product_id)
{
UnifiedOrder order = new UnifiedOrder();
order.appid = WXconfig.appid;
order.attach = "服務費";
order.body = boby;
order.device_info = "";
order.mch_id = WXconfig.mch_id;
order.nonce_str = TenpayUtil.getNoncestr();
order.notify_url = Wxconfig.url;
order.out_trade_no = out_trade_no;
order.product_id = product_id;
order.trade_type = "NATIVE";
order.spbill_create_ip = spbill_create_ip;
order.total_fee = Convert.ToInt32((total_fee) * 100);
TenpayUtil tenpay = new TenpayUtil();
string paySignKey = WXconfig.paysignkey;
string code_url = tenpay.getcode_url(order, paySignKey);
return code_url;
}
/// <summary>
/// 查詢掃碼訂單情況
/// </summary>
/// <param name="out_trade_no">商戶訂單號</param>
/// <returns></returns>
public OrderDetail geidingdan(string out_trade_no)
{
TenpayUtil tenpay = new TenpayUtil();
OrderDetail detail = tenpay.getOrderDetail(out_trade_no);
return detail;
}
public class TenpayUtil
{
#region url
/// <summary>
/// 統一支付接口
/// </summary>
const string UnifiedPayUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";
/// <summary>
/// 網頁授權接口
/// </summary>
const string access_tokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token";
/// <summary>
/// 微信訂單查詢接口
/// </summary>
const string OrderQueryUrl = "https://api.mch.weixin.qq.com/pay/orderquery";
#endregion
#region 隨機串,時間截
/// <summary>
/// 隨機串
/// </summary>
public static string getNoncestr()
{
Random random = new Random();
return MD5Util.GetMD5(random.Next(1000).ToString(), "GBK").ToLower().Replace("s", "S");
}
/// <summary>
/// 時間截，自1970年以來的秒數
/// </summary>
public static string getTimestamp()
{
TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
return Convert.ToInt64(ts.TotalSeconds).ToString();
}
#endregion
/// <summary>
/// 網頁授權接口
/// </summary>
public static string getAccess_tokenUrl()
{
return access_tokenUrl;
}
#region 把微信掃碼支付的回調XML轉換集合
public string GetXml(string xmlstring) {
SortedDictionary < string, object> sd= GetInfoFromXml(xmlstring);
string reslut = "";
foreach (KeyValuePair<string, object> s in sd) {
if (s.Key == "result_code") {
reslut= s.Value.ToString();
}
}
return reslut;
}
#endregion
#region 獲取微信簽名
/// <summary>
/// 獲取微信簽名
/// </summary>
/// <param name="sParams"></param>
/// <returns></returns>
public string getsign(SortedDictionary<string, object> sParams, string key)
{
int i = 0;
string sign = string.Empty;
StringBuilder sb = new StringBuilder();
foreach (KeyValuePair<string, object> temp in sParams)
{
if (temp.Value.ToString() == "" || temp.Value == null || temp.Key.ToLower() == "sign")
{
continue;
}
i++;
sb.Append(temp.Key.Trim() + "=" + temp.Value.ToString() + "&");
}
sb.Append("key=" + key.Trim() + "");
string signkey = sb.ToString();
sign = MD5Util.GetMD5(signkey, "utf-8");
//utf-8
return sign;
}
#endregion
#region post數據到指定接口並返回數據
/// <summary>
/// post數據到指定接口並返回數據
/// </summary>
public string PostXmlToUrl(string url, string postData,string type="")
{
string returnmsg = "";
using (System.Net.WebClient wc = new System.Net.WebClient())
{
if (type != "") {
Encoding encoding = Encoding.UTF8;
wc.Encoding = System.Text.Encoding.GetEncoding("GB2312");
byte[] data = encoding.GetBytes(postData);
returnmsg = Encoding.UTF8.GetString(wc.UploadData(url, "POST", data));
}
else
returnmsg = wc.UploadString(url, "POST", postData);
}
return returnmsg;
}
#endregion
#region 獲取code_url
/// <summary>
/// 獲取code_url
/// </summary>
public string getcode_url(UnifiedOrder order, string key)
{
string code_url = "";
string post_data = getUnifiedOrderXml(order, key);
string request_data = PostXmlToUrl(UnifiedPayUrl, post_data);
//string request_data = HttpRequestutil.RequestUrl(UnifiedPayUrl, post_data, "post");
SortedDictionary<string, object> requestXML = GetInfoFromXml(request_data);
foreach (KeyValuePair<string, object> k in requestXML)
{
if (k.Key == "code_url")
{
code_url = k.Value.ToString();
break;
}
}
return code_url;
}
#endregion
#region 獲取prepay_id
/// <summary>
/// 獲取prepay_id
/// </summary>
public string getPrepay_id(UnifiedOrder order, string key)
{
string prepay_id = "";
string post_data = getUnifiedOrderXml(order, key);
string request_data = PostXmlToUrl(UnifiedPayUrl, post_data);
SortedDictionary<string, object> requestXML = GetInfoFromXml(request_data);
foreach (KeyValuePair<string, object> k in requestXML)
{
if (k.Key == "prepay_id")
{
prepay_id = k.Value.ToString();
break;
}
}
return prepay_id;
}
#endregion
#region 獲取微信訂單明細
/// <summary>
/// 獲取微信訂單明細
/// </summary>
public OrderDetail getOrderDetail(string out_trade_no)
{
string post_data = getQueryOrderXml(out_trade_no);
string request_data = PostXmlToUrl(OrderQueryUrl, post_data,"1");
OrderDetail orderdetail = new OrderDetail();
SortedDictionary<string, object> requestXML = GetInfoFromXml(request_data);
foreach (KeyValuePair<string, object> k in requestXML)
{
switch (k.Key)
{
case "retuen_code":
orderdetail.result_code = k.Value.ToString();
break;
case "return_msg":
orderdetail.return_msg = k.Value.ToString();
break;
case "appid":
orderdetail.appid = k.Value.ToString();
break;
case "mch_id":
orderdetail.mch_id = k.Value.ToString();
break;
case "nonce_str":
orderdetail.nonce_str = k.Value.ToString();
break;
case "sign":
orderdetail.sign = k.Value.ToString();
break;
case "result_code":
orderdetail.result_code = k.Value.ToString();
break;
case "err_code":
orderdetail.err_code = k.Value.ToString();
break;
case "err_code_des":
orderdetail.err_code_des = k.Value.ToString();
break;
case "trade_state":
orderdetail.trade_state = k.Value.ToString();
break;
case "device_info":
orderdetail.device_info = k.Value.ToString();
break;
case "openid":
orderdetail.openid = k.Value.ToString();
break;
case "is_subscribe":
orderdetail.is_subscribe = k.Value.ToString();
break;
case "trade_type":
orderdetail.trade_type = k.Value.ToString();
break;
case "bank_type":
orderdetail.bank_type = k.Value.ToString();
break;
case "total_fee":
orderdetail.total_fee = k.Value.ToString();
break;
case "coupon_fee":
orderdetail.coupon_fee = k.Value.ToString();
break;
case "fee_type":
orderdetail.fee_type = k.Value.ToString();
break;
case "transaction_id":
orderdetail.transaction_id = k.Value.ToString();
break;
case "out_trade_no":
orderdetail.out_trade_no = k.Value.ToString();
break;
case "attach":
orderdetail.attach = k.Value.ToString();
break;
case "time_end":
orderdetail.time_end = k.Value.ToString();
break;
default:
break;
}
}
return orderdetail;
}
#endregion
#region
#region 把XML數據轉換爲SortedDictionary
/// <summary>
/// 把XML數據轉換爲SortedDictionary<string, string>集合
/// </summary>
/// <param name="strxml"></param>
/// <returns></returns>
protected SortedDictionary<string, object> GetInfoFromXml(string xmlstring)
{
SortedDictionary<string, object> sParams = new SortedDictionary<string, object>();
try
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlstring);
XmlElement root = doc.DocumentElement;
int len = root.ChildNodes.Count;
for (int i = 0; i < len; i++)
{
string name = root.ChildNodes[i].Name;
if (!sParams.ContainsKey(name))
{
sParams.Add(name.Trim(), root.ChildNodes[i].InnerText.Trim());
}
}
}
catch(Exception ex ) {
}
return sParams;
}
#endregion
#region 微信統一下單接口xml參數整理
/// <summary>
/// 微信統一下單接口xml參數整理
/// </summary>
/// <param name="order">微信支付參數實例</param>
/// <param name="key">密鑰</param>
/// <returns></returns>
protected string getUnifiedOrderXml(UnifiedOrder order, string key)
{
string return_string = string.Empty;
SortedDictionary<string, object> sParams = new SortedDictionary<string, object>();
sParams.Add("appid", order.appid);
sParams.Add("attach", order.attach);
sParams.Add("body", order.body);
sParams.Add("device_info", order.device_info);
sParams.Add("mch_id", order.mch_id);
sParams.Add("nonce_str", order.nonce_str);
sParams.Add("notify_url", order.notify_url);
//當 trade_type=JSAPI 時必輸入
if (order.trade_type == "JSAPI")
{
sParams.Add("openid", order.openid);
}
else if (order.trade_type == "NATIVE")
{
//當 trade_type=NATIVE 時必輸入
sParams.Add("product_id", order.product_id);
}
sParams.Add("out_trade_no", order.out_trade_no);
sParams.Add("spbill_create_ip", order.spbill_create_ip);
sParams.Add("total_fee", order.total_fee);
sParams.Add("trade_type", order.trade_type);
order.sign = getsign(sParams, key);
sParams.Add("sign", order.sign);
//拼接成XML請求數據
StringBuilder sbPay = new StringBuilder();
foreach (KeyValuePair<string, object> k in sParams)
{
if (k.Key == "attach" || k.Key == "body" || k.Key == "sign")
{
sbPay.Append("<" + k.Key + "><![CDATA[" + k.Value + "]]></" + k.Key + ">");
}
else
{
sbPay.Append("<" + k.Key + ">" + k.Value + "</" + k.Key + ">");
}
}
return_string = string.Format("<xml>{0}</xml>", sbPay.ToString());
byte[] byteArray = Encoding.UTF8.GetBytes(return_string);
return_string = Encoding.GetEncoding("GBK").GetString(byteArray);
Byte[] temp = Encoding.UTF8.GetBytes(return_string);
string dataGBK = Encoding.GetEncoding("utf-8").GetString(temp);
return return_string;
// GBK
}
#endregion
#region 微信訂單查詢接口XML參數整理
/// <summary>
/// 微信訂單查詢接口XML參數整理
/// </summary>
/// <param name="queryorder">微信訂單查詢參數實例</param>
/// <param name="key">密鑰</param>
/// <returns></returns>
protected string getQueryOrderXml(string out_trade_no)
{
string return_string = string.Empty;
SortedDictionary<string, object> sParams = new SortedDictionary<string, object>();
sParams.Add("appid", WXconfig.appid);
sParams.Add("mch_id", WXconfig.mch_id);
// sParams.Add("transaction_id", queryorder.transaction_id);
sParams.Add("out_trade_no", out_trade_no);
sParams.Add("nonce_str", getNoncestr());
string sign = getsign(sParams, WXconfig.paysignkey);
sParams.Add("sign", sign);
//拼接成XML請求數據
StringBuilder sbPay = new StringBuilder();
foreach (KeyValuePair<string, object> k in sParams)
{
if (k.Key == "attach" || k.Key == "body" || k.Key == "sign")
{
sbPay.Append("<" + k.Key + "><![CDATA[" + k.Value + "]]></" + k.Key + ">");
}
else
{
sbPay.Append("<" + k.Key + ">" + k.Value + "</" + k.Key + ">");
}
}
return_string = string.Format("<xml>{0}</xml>", sbPay.ToString().TrimEnd(','));
return return_string;
}
#endregion
#endregion
}
public class MD5Util
{
public MD5Util() {
//
// TODO: 在此處添加構造函數邏輯
//
}
/// <summary>
/// /** 獲取大寫的MD5簽名結果 */
/// </summary>
/// <param name="encypStr">數據</param>
/// <param name="charset">編碼格式</param>
/// <returns></returns>
public static string GetMD5(string encypStr, string charset)
{
string retStr;
MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();
//創建md5對象
byte[] inputBye;
byte[] outputBye;
//使用GB2312編碼方式把字符串轉化爲字節數組．
try
{
inputBye = Encoding.GetEncoding(charset).GetBytes(encypStr);
}
catch (Exception ex)
{
inputBye = Encoding.GetEncoding("GB2312").GetBytes(encypStr);
}
outputBye = m5.ComputeHash(inputBye);
retStr = System.BitConverter.ToString(outputBye);
retStr = retStr.Replace("-", "").ToUpper();
return retStr;
}
/// <summary>
/// SHA1加密
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string sha1(string str)
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "sha1").ToLower();
}
}1.1 獲取掃碼支付的結果接口(建議輪番獲取狀態)
請求方式：http get
接口參數說明
名稱 | 類型 | 必填 | 說明 |
out_trade_no | String | 是 | 支付訂單ID |
返回結果: code :1//支付成功
返回結果: code :2//未支付
返回結果: code :3//用戶支付中
返回結果: code :4//支付失敗
返回結果: code :0//其他狀態
返回結果: code :-1,Message="錯誤信息"//系統異常
返回結果: code :-2//訂單號不能爲空
備註：(code 不爲-1，1，-2的時候輪番調取接口，建議時間爲1s~2s,爲-1的時候，提示系統異常，聯繫管理員。爲1的時候跳到完成頁面。)
訂單查詢說明：微信支付雖然有回調(個人認爲比較坑),這裏我是用了自己支付訂單號去查詢微信支付的該訂單狀態。（微信文檔有說明，有2個方式，一個回調，一個用支付訂單查詢訂單狀態）