C# 调用腾讯地图WebService API获取距离(一对多)

官方文档地址:https://lbs.qq.com/webservice_v1/guide-distance.html

代码:

 /// <summary>
         /// 获取距离最近的点的经纬度
         /// </summary>
         /// <param name="from">起点坐标以英文逗号分隔,纬度在前,经度在后(纬度,经度;例:39.071510,117.190091)</param>
         /// <param name="to">终点坐标单个坐标以英文逗号分隔,坐标之间以英文分号分隔(例:39.071510,117.190091;40.007632,116.389160;39.840177,116.463318)</param>
         /// <param name="mode">计算方式：driving（驾车）、walking（步行）默认：walking</param>
         /// <returns></returns>
         public static Distance GetShortestDistance(string from = "", string to = "", string mode = "walking")
         {
             if (string.IsNullOrEmpty(from) || string.IsNullOrEmpty(to))
             {
                 return null;
             }
             var url = new Config().DistanceUrl;
             var Data = new SortedDictionary<string, string>();
             Data.Add("mode", mode);
             Data.Add("from", from);
             Data.Add("to", to);
             Data.Add("key", new Config().TencentMapKey);//new Config().TencentMapKey,腾讯开发平台分配的key
             var dataStr = string.Empty;
             foreach (var item in Data)
             {
                 dataStr += item.Key + "=" + item.Value + "&";
             }
             var postData = dataStr.Substring(, dataStr.Length - );
             var signData = postData + new Config().TencentMapSN;//new Config().TencentMapSN,腾讯开放平台分配的验签值,,
             var sign = DoEncrypt.MD5("/ws/distance/v1/?" + signData);//md5加密
             postData += "&sig=" + sign;
             var result = DoWebRequest.SendRequest_Get(url, postData);
             var postResult = DoWebRequest.SendRequest_Get(url, postData);
             if (!string.IsNullOrEmpty(postResult))
             {
                 return postResult.ToObjectFromJson<Distance>();
             }
             return null;
         }

根据API返回类容定义的解析对象:

 public class Distance
         {
             public int status { get; set; }//返回状态码
             public string message { get; set; }//状态码说明
             public object result { get; set; }//返回内容
         }