快遞100的物流資訊查詢介面，官方提供了一些demo;還好官方提供的程式碼是.netcore版本寫的，不過寫的有點low;根據官方提供的程式碼，我按照.netcore 的風格重構了程式碼；核心程式碼如下：

/// <summary>
    /// 沐雪微淘快遞100幫助類.
    /// </summary>
    public class KuaiDi100Helper
    {
        private ILogger _logger;
        private MuXueConfigHelper _configHelper;
        HttpClient _client;
 
        /// <summary>
        /// 快遞100幫助類
        /// </summary>
        /// <param name="logger"></param>
        /// <param name="configHelper"></param>
        public KuaiDi100Helper(ILogger<KuaiDi100Helper> logger,HttpClient client,MuXueConfigHelper configHelper)
        {
            _configHelper = configHelper;
            _logger = logger;
            _client = client;
        }
 
        /// <summary>
        /// 實時快遞查詢介面
        /// </summary>
        /// <param name="tenant_id"></param>
        /// <param name="shop_code"></param>
        /// <param name="com">查詢的快遞公司的編碼， 一律用小寫字母</param>
        /// <param name="num">查詢的快遞單號， 單號的最大長度是32個字元</param>
        /// <param name="phone">收、寄件人的電話號碼（手機和固定電話均可，只能填寫一個，順豐單號必填，其他快遞公司選填。如座機號碼有分機號，分機號無需上傳。）</param>
        /// <returns></returns>
        public async Task<QueryTackResult> QueryTrack(long tenant_id,string shop_code,string com,string num,string phone="")
        {
            QueryTackResult result = new QueryTackResult();
            try
            {
 
                TenantConfig config = await _configHelper.GetTenantAllAsync(tenant_id,shop_code);
 
                QueryTrackParam queryTrackParam = new QueryTrackParam();
                if (
 
程式設計客棧com== "shunfeng")
                {
                      queryTrackParam = new QueryTrackParam()
                    {
                        com = com,num = num,phone = phone
                    };
                }
                else
                {
                      queryTrackParam = new QueryTrackParam()
                    {
                        com = www.cppcns.com
 
com,};
                }
               
 
                QueryTrackReq query = new QueryTrackReq()
                {
                    customer = config.Kuwww.cppcns.comaiDi100CustomerID,sign = SignUtils.GetMD5(queryTrackParam.ToString() + config.KuaiDi100Key + config.KuaiDi100CustomerID),param = queryTrackParam
                };
                var requestParam = ObjectToDictionaryUtils.ObjectToMap(query);
                if (requestParam == null)
                {
                    return null;
                }
                 
                 result = await HttpClientHelper.PostFormAsync<QueryTackResult>(_client,ApiInfoCowww.cppcns.com
 
nstant.QUERY_URL,requestParam);
                 
            }
            catch (Exception ex)
            {
                _logger.LogError(ex,$"快遞100實時快遞查詢介面異常：{ex.Message}");
                return null;
            }
            return result;
        }
 
 
    }

上面的程式碼一眼看，就知道必須要使用依賴注入；我們看到 在建構函式裡使用了HttpClient _client 這個東西；（因為要呼叫快遞100的介面），

我們在startup裡接著寫：

 services.AddScoped<KuaiDi100Helper>();

如上程式碼應該是最常用的註冊方法；結果報錯，錯誤資訊如下：

System.AggregateException:“Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: MuXue.WeTao.Mall.Core.kuaidi100.KuaiDi100Helper Lifetime: Scoped ImplementationType: MuXue.WeTao.Mall.Core.kuaidi100.KuaiDi100Helper': Unable to resolve service for type 'System.Net.Http.HttpClient' while attempting to activate 'MuXue.WeTao.Mall.Core.kICDEZvFrDIuaidi100.KuaiDi100Helper'.)”


InvalidOperationException: Unable to resolve service for type 'System.Net.Http.HttpClient' while attempting to activate 'MuXue.WeTao.Mall.Core.kuaidi100.KuaiDi100Helper'.

根據錯誤資訊看，應該是httpclient出了問題了；找了很久才找到解決方法，修改startup裡的註冊方法

services.AddHttpClient<KuaiDi100Helper>(); //這樣注入

這樣就沒問題了。

到此這篇關於.netcore 寫快遞100的快遞物流資訊查詢介面的實現的文章就介紹到這了,更多相關.netcore 快遞查詢介面內容請搜尋我們以前的文章或繼續瀏覽下面的相關文章希望大家以後多多支援我們！