.netCore微信转账至零钱——V3

1.需要登录商户平台申请微信转账至零钱
2.申请成功之后在产品设置里设置上限金额以及白名单IP
3.需要在IIS上程序池对应的高级设置把加载用户配置文件改成“True”
4.上请求代码
5.微信API，https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter4_3_1.shtml

//提现转账

                IDictionary<string, object> moneyrequest = new Dictionary<string, object>();
                List<Dictionary<string, object>> transfer_detail_list = new List<Dictionary<string, object>>();
                Dictionary<string, object> dic = new Dictionary<string, object>();

                moneyrequest.Add("appid", "1111"); //商户账号的appid
                moneyrequest.Add("out_batch_no", "11" + DateTime.Now.ToString("yyyyMMddHHmmss"));
                moneyrequest.Add("batch_name", "11" + DateTime.Now.ToString("yyyyMMddHHmmss"));
                moneyrequest.Add("batch_remark", "11" + DateTime.Now.ToString("yyyyMMddHHmmss"));
                moneyrequest.Add("total_amount", entity.Money * 100); //转账金额,单位为分
                moneyrequest.Add("total_num", 1);
                dic.Add("out_detail_no", DateTime.Now.ToString("yyyyMMddHHmmss"));
                dic.Add("transfer_amount", entity.Money * 100);
                dic.Add("transfer_remark", "11:" + entity.Money  + "元");
                dic.Add("openid", userEntity.OpenID);//收款用户openid
                transfer_detail_list.Add(dic);
                moneyrequest.Add("transfer_detail_list", transfer_detail_list);

                var json = Newtonsoft.Json.JsonConvert.SerializeObject(moneyrequest);

                LogHelper.Info("json:" + json);

                var ret = WithDrawsToWx.WxV3PostJson(json);

请求微信API

public class WithDrawsToWx
    {
        private const string mch_appid = "111"; //商户账号的appid
        private const string merchantId = "111"; //商户号
        private const string key = "111"; //微信支付平台商家设置的私钥
        private static string url = "https://api.mch.weixin.qq.com/v3/transfer/batches"; //请求微信接口地址
        private static string privateKey = "私密密钥";//不要-----BEGIN PRIVATE KEY-----  -----END PRIVATE KEY-----
        private static string serialNo = "证书序列号";

        /// <summary>
        /// V3版本请求接口
        /// </summary>
        /// <param name="url">微信的接口地址</param>
        /// <param name="postData">post请求的数据，json格式 </param>
        /// <param name="privateKey">apiclient_key.pem中的内容，不要-----BEGIN PRIVATE KEY-----  -----END PRIVATE KEY-----</param>
        /// <param name="merchantId">发起请求的商户（包括直连商户、服务商或渠道商）的商户号 mchid</param>
        /// <param name="serialNo">商户证书号</param>
        /// <param name="method"></param>
        /// <returns></returns>
        public static string WxV3PostJson( string postData,string method="POST")
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = method;
            request.ContentType = "application/json;charset=UTF-8";
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3100.0 Safari/537.36";
            request.Accept = "application/json";

            string Authorization = GetAuthorization(url, method, postData, privateKey, merchantId, serialNo);

            string value = $"WECHATPAY2-SHA256-RSA2048 {Authorization}";

            request.Headers.Add("Authorization", value);

            if (!string.IsNullOrEmpty(postData))
            {
                byte[] paramJsonBytes;
                paramJsonBytes = System.Text.Encoding.UTF8.GetBytes(postData);
                request.ContentLength = paramJsonBytes.Length;
                Stream writer;
                try
                {
                    writer = request.GetRequestStream();
                }
                catch (Exception e)
                {
                    writer = null;
                    LogHelper.Info("请求接口失败:" + e.Message);
                }
                writer.Write(paramJsonBytes, 0, paramJsonBytes.Length);
                writer.Close();
            }

            HttpWebResponse response;
            try
            {
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream resStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(resStream);
            string text = reader.ReadToEnd();

            return text;
        }

        /// <summary>
        /// 获取authorzation 值
        /// </summary>
        /// <param name="url">微信的接口地址</param>
        /// <param name="method">请求的方式GET,POST,PUT</param>
        /// <param name="jsonParame">post请求的数据，json格式  ，get时传空</param>
        /// <param name="privateKey">apiclient_key.pem中的内容，不要-----BEGIN PRIVATE KEY-----  -----END PRIVATE KEY-----</param>
        /// <param name="merchantId">发起请求的商户（包括直连商户、服务商或渠道商）的商户号 mchid</param>
        /// <param name="serialNo">商户证书号</param>
        /// <returns></returns>
        private static string GetAuthorization(string url, string method, string jsonParame, string privateKey, string merchantId, string serialNo)
        {
            var uri = new Uri(url);
            string urlPath = uri.PathAndQuery;
            string nonce = Guid.NewGuid().ToString();
            var timestamp = DateTimeOffset.Now.ToUnixTimeSeconds();
            //数据签名     HTTP请求方法n接口地址的urln请求时间戳n请求随机串n请求报文主体n
            method = string.IsNullOrEmpty(method) ? "" : method;
            string message = $"{method}\n{urlPath}\n{timestamp}\n{nonce}\n{jsonParame}\n";
            string signTxt = Sign(message, privateKey);
            //Authorization和格式

            string authorzationTxt = $"mchid=\"{merchantId}\",nonce_str=\"{nonce}\",timestamp=\"{timestamp}\",serial_no=\"{serialNo}\",signature=\"{signTxt}\"";

            return authorzationTxt;
        }

        /// <summary>
        /// 获取签名
        /// </summary>
        private static string Sign(string message, string privateKey)
        {
            byte[] keyData = Convert.FromBase64String(privateKey);

            var rsa = RSA.Create();

            rsa.ImportPkcs8PrivateKey(keyData, out int bytesRead);

            byte[] data = Encoding.UTF8.GetBytes(message);

            return Convert.ToBase64String(rsa.SignData(data, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1));
        }

        public class WithDrawsV3Back
        {
            /// <summary>
            /// 微信批次单号
            /// </summary>
            public string batch_id { get; set; }
            /// <summary>
            /// 商家批次单号
            /// </summary>
            public string out_batch_no { get; set; }
            public string create_time { get; set; }
            public string code { get; set; }
            public string message { get; set; }
        }

      
    }