根据银行卡号获取开户行

    public class BankCardInfoProvider : IBankCardInfoProvider
    {
        private string _key;
        private string _url;
        private string _header;
        public BankCardInfoProvider(IOptions<BankCardInfoConfig> _config)
        {
            var config = _config.Value;

            if (config == null)
                throw new ArgumentNullException(nameof(config));

            if (string.IsNullOrEmpty(config.Key))
                throw new ArgumentNullException(nameof(config.Key));
            if (string.IsNullOrEmpty(config.Url))
                throw new ArgumentNullException(nameof(config.Url));
            if (string.IsNullOrEmpty(config.Header))
                throw new ArgumentNullException(nameof(config.Header));

            _key = config.Key;
            _url = config.Url;
            _header = config.Header;
        }

        public async Task<BankCardInfoResult> GetBankCardInfoAsync(string bankCardNumber)
        {
            if (string.IsNullOrEmpty(bankCardNumber))
                throw new ArgumentNullException(nameof(bankCardNumber));

            CardInfo cardInfo = null;
            string url = $"{_url}{bankCardNumber}";
            var http = new HttpClient();
            var header = _header.Split(':');
            http.DefaultRequestHeaders.Add(header[0], header[1] + _key);

            var response = await http.GetAsync(url);
            if (response.IsSuccessStatusCode)
            {
                string contentStr = await response.Content.ReadAsStringAsync();
                cardInfo = JsonConvert.DeserializeObject<CardInfo>(contentStr);
            }

            if (cardInfo == null || cardInfo.Code != 0)
            {
                throw new SinoException(ErrorCode.E007001, nameof(ErrorCode.E007001).GetCode());
            }
            else
            {
                string bankName = cardInfo.Data?.BankName;
                bankName = bankName == "中国银行" ? "中国银行" : bankName.IndexOf("中国") != -1 ? bankName.Replace("中国", "") : bankName;
                return new BankCardInfoResult
                {
                    Code = cardInfo.Code,
                    Msg = cardInfo.Msg,
                    Province = cardInfo.Data?.Province,
                    City = cardInfo.Data?.City,
                    CardType = cardInfo.Data?.CardType,
                    CardPreFixNum = cardInfo.Data?.CardPreFixNum,
                    BankNum = cardInfo.Data?.BankNum,
                    LogoUrl = cardInfo.Data?.LogoUrl,
                    CardName = cardInfo.Data?.CardName,
                    BankName = bankName,
                    ServicePhone = cardInfo.Data?.ServicePhone,
                    BankUrl = cardInfo.Data?.BankUrl
                };
            }
        }
    }

{
   "BankCardInfoConfig": {
    "Key": "",
    "Url": "http://api43.market.alicloudapi.com/api/c43?apiversion=2.0.5&bankcard=",
    "Header": "Authorization:APPCODE "
  }  
}

using Newtonsoft.Json;

namespace Sino.TMSystem.CommonService
{
    /// <summary>
    /// 卡信息
    /// </summary>
    public class CardInfo
    {
        /// <summary>
        /// 状态码（0表示请求成功，其他表示查询失败）
        /// </summary>
        [JsonProperty("error_code")]
        public int Code { get; set; }

        /// <summary>
        /// 对应code的信息
        /// </summary>
        [JsonProperty("reason")]
        public string Msg { get; set; }

        /// <summary>
        /// Luhn校验值
        /// </summary>
        [JsonProperty("ordersign")]
        public string Ordersign { get; set; }

        /// <summary>
        /// 卡主体信息
        /// </summary>
        [JsonProperty("result")]
        public CardInfoBody Data { get; set; }


    }

    /// <summary>
    /// 卡信息主体
    /// </summary>
    public class CardInfoBody
    {
        /// <summary>
        /// 卡种
        /// </summary>
        [JsonProperty("cardtype")]
        public string CardType { get; set; }

        /// <summary>
        /// 卡片类型
        /// </summary>
        [JsonProperty("cardname")]
        public string CardName { get; set; }

        /// <summary>
        /// 开户银行名称
        /// </summary>
        [JsonProperty("bankname")]
        public string BankName { get; set; }

        /// <summary>
        /// 保留（开户行编码）
        /// </summary>
        [JsonProperty("banknum")]
        public string BankNum { get; set; }

        /// <summary>
        /// 开户省份
        /// </summary>
        [JsonProperty("province")]
        public string Province { get; set; }

        /// <summary>
        /// 开户城市
        /// </summary>
        [JsonProperty("city")]
        public string City { get; set; }

        /// <summary>
        /// 银行客服电话
        /// </summary>
        [JsonProperty("servicephone")]
        public string ServicePhone { get; set; }

        /// <summary>
        /// 银行官网
        /// </summary>
        [JsonProperty("bankurl")]
        public string BankUrl { get; set; }

        /// <summary>
        /// 卡的前缀（银行卡bin号）
        /// </summary>
        [JsonProperty("cardprefixnum")]
        public string CardPreFixNum { get; set; }

        /// <summary>
        /// 银行小Logo
        /// </summary>
        [JsonProperty("bankimage")]
        public string LogoUrl { get; set; }

    }
}