NET+EF+MVC 微信支付-小程序直接发起支付

在开发小程序微信支付的时候，如何调起小程序直接发起支付，是许多开发者困扰的问题，今天笔者把整个接口代码归纳如下，希望对你所有帮助：

源代码如下：

#region 创建统一订单接口 yefei 2022-10-09

/// <summary>

/// 创建统一订单接口 yefei 2022-10-09

/// </summary>

/// <param name="data"></param>

/// <returns></returns>

[HttpPost]

public HttpResponseMessage CreateUnifiedOrder(object data)

{

HttpResponseMessage result = null;

var ReturnStr = "{\"status\":\"N\",\"msg\":\"参数错误\"}";

string Sdata = data.ToString();

var admin = JsonConvert.DeserializeObject<dynamic>(Sdata);//动态对象

decimal subsidiary_id = 0;

decimal ufx_userid = 0;

string openid = null;

string ordertime = null;

string appid = System.Web.Configuration.WebConfigurationManager.AppSettings["small_appid3"].ToString();

string secret = System.Web.Configuration.WebConfigurationManager.AppSettings["small_secret3"].ToString();

string key = System.Web.Configuration.WebConfigurationManager.AppSettings["wx_key3"].ToString();

string mch_id = System.Web.Configuration.WebConfigurationManager.AppSettings["wx_mch_id3"].ToString();

string ip = "219.234.87.16";

string PayResulturl = System.Web.Configuration.WebConfigurationManager.AppSettings["wxpay_notifyurl3"].ToString();

string aa = "购票通商城";

string strcode = aa;

byte[] buffer = Encoding.UTF8.GetBytes(strcode);

string body = Encoding.UTF8.GetString(buffer, 0, buffer.Length);

string roomid = null; //商户订单号

string totalfee =null; //订单总金额

WisdomStarts.Common.Log.NetLog.WriteTextLog("请求了该接口:", "CreateUnifiedOrder");

if (admin.subsidiary_id != null)

{

subsidiary_id = admin.subsidiary_id;

}

if (admin.ufx_userid != null)

{

ufx_userid = admin.ufx_userid;

}

if (admin.openid != null)

{

openid = admin.openid;

}

if (admin.ordertime != null)

{

ordertime = admin.ordertime;

}

if (admin.roomid != null)

{

roomid = admin.roomid;

}

if (admin.totalfee != null)

{

totalfee = admin.totalfee;

}

if (subsidiary_id <= 0)

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"公司ID不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

else if (ufx_userid <= 0)

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"分销用户ID不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

else if (string.IsNullOrEmpty(openid))

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"openid不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

else if (string.IsNullOrEmpty(ordertime))

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"订单时间不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

else if (string.IsNullOrEmpty(roomid))

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"订单号不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

else if (string.IsNullOrEmpty(totalfee))

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"订单金额不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

else

{

string Token = admin.Token;

#region 验证token

if (!string.IsNullOrEmpty(Token))

{

int t = new WisdomStars.Bll.Api.Common().PUB_VerificationToken(Token);

if (t <= 0)

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"登录失效\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

}

else

{

ReturnStr = "{\"result\":\"" + (int)KeyEnum.AppReturn.失败 + "\",\"msg\":\"token不能为空\",\"data\":\"\"}";

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

#endregion 验证token

if (subsidiary_id > 0 && ufx_userid > 0 && !string.IsNullOrEmpty(roomid) && !string.IsNullOrEmpty(totalfee))

{

var dic = new Dictionary<string, string>

{

{"appid", appid},

{"mch_id", mch_id},

{"nonce_str", GetRandomString(20)/*Random.Next().ToString()*/},

{"body",body},

{"out_trade_no",roomid},//商户自己的订单号码

{"total_fee",totalfee}, //正式

// {"total_fee","0.01"}, //测试

{"spbill_create_ip",ip},//服务器的IP地址

{"notify_url",PayResulturl},//异步通知的地址，不能带参数

{"trade_type","JSAPI" },

{"openid",openid}

};

//加入签名

dic.Add("sign", GetSignString(dic));

var sb = new StringBuilder();

sb.Append("<xml>");

foreach (var d in dic)

{

sb.Append("<" + d.Key + ">" + d.Value + "</" + d.Key + ">");

}

sb.Append("</xml>");

var xml = new XmlDocument();

// xml.LoadXml(GetPostString("https://api.mch.weixin.qq.com/pay/unifiedorder", sb.ToString()));

CookieCollection coo = new CookieCollection();

Encoding en = Encoding.GetEncoding("UTF-8");

HttpWebResponse response = CreatePostHttpResponse("https://api.mch.weixin.qq.com/pay/unifiedorder", sb.ToString(), en);

//打印返回值

Stream stream = response.GetResponseStream(); //获取响应的字符串流

StreamReader sr = new StreamReader(stream); //创建一个stream读取流

string html = sr.ReadToEnd(); //从头读到尾，放到字符串html

//Console.WriteLine(html);

//context.Response.Write(html);

//context.Response.End();

xml.LoadXml(html);

//对请求返回值 进行处理

var root = xml.DocumentElement;

DataSet ds = new DataSet();

StringReader stram = new StringReader(html);

XmlTextReader reader = new XmlTextReader(stram);

ds.ReadXml(reader);

string return_code = ds.Tables[0].Rows[0]["return_code"].ToString();

if (return_code.ToUpper() == "SUCCESS")

{

//通信成功

string result_code = ds.Tables[0].Rows[0]["result_code"].ToString();//业务结果

if (result_code.ToUpper() == "SUCCESS")

{

var res = new Dictionary<string, string>

{

{"appId", appid},

{"timeStamp", GetTimeStamp()},

{"nonceStr", dic["nonce_str"]},

// {"package", "prepay_id="+ds.Tables[0].Rows[0]["prepay_id"].ToString()},

{"prepay_id", ds.Tables[0].Rows[0]["prepay_id"].ToString()},

{"signType", "MD5"}

};

//在服务器上签名

res.Add("paySign", GetSignString(res));

//string str = ToUrlParams(data.GetValues());//转换为URL串

//string url = "weixin://wxpay/bizpayurl?" + str;

// string signapp = res.ToString();

string signapp = JsonConvert.SerializeObject(res);

ReturnStr = "{\"status\":\"Y\",\"msg\":\"操作成功\",\"signapp\":" + signapp.ToString() + "}";

// context.Response.Write(signapp);

}

}

else

{

ReturnStr = "{\"status\":\"N\",\"msg\":\"操作失败\",\"signapp\":\"0\"}";

}}

}

result = new HttpResponseMessage { Content = new StringContent(ReturnStr, Encoding.GetEncoding("UTF-8"), "application/json") };

return result;

}

#endregion 创建统一订单接口

二、请求参数：

{

"ufx_userid": "1",

"subsidiary_id": "10101537340017385406464",

"openid": "o55tG43Akb_yKS9MeXx8YOJJoqcw",

"ordertime": "2022-10-09 11:20",

"roomid": "509066274693557314636085",

"totalfee": "100",

"Token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJVc2VyTmFtZSI6IjEzOTAxMDQxNDcwIiwiRXhwaXJ5RGF0ZVRpbWUiOiIyMDIyLTA5LTI2VDE2OjA2OjUwLjM4MjEyNzIrMDg6MDAiLCJUb2tlblR5cGUiOjR9.ZyiePFdekxmxr5BaY0atBAtmR8TSI8uStUtEZwbTpn4"

}

三、返回结果

{

"status": "Y",

"msg": "操作成功",

"signapp": {

"appId": "wx03fba3a77d0010ae",

"timeStamp": "1665295210",

"nonceStr": "ATUB8BGYOU83MLDVYNRG",

"prepay_id": "wx091359540853450ba8b9044ca84ac80000",

"signType": "MD5",

"paySign": "AA45E8D32B55E6BBE72F77D8588491B3"

}

}