如何通过地址转换为WGS经纬度

原理如下：

1.我们需要创建两张表  SourceTable和LonLatTable

其中SourceTable作为需要转换的地址存储信息LonLatTable为转换后的地址存储信息

这里可以不需要LonLatTable直接修改SourceTable其实也可以，但是为了方便（insert比update方便的多）所以就直接新建了LonLatTable这张表

字段值如下：

public int Id { get; set; }
public string TEL { get; set; }
public string Address { get; set; }
public string Lon { get; set; }
public string Lat { get; set; }
public string ReportTime { get; set; }
public string Area { get; set; }
public string MobileType { get; set; }

2.我们需要根据地址转换为经纬度，这里用到了百度（百度坐标）和高德（火星坐标）两种转换方式，百度转换是带置信度的，高德的不带置信度，当百度转换时置信度（Precise）为1时，则为准确转换这里我们一百度为准，当百度转换是置信度不为1或者无法转换是时我们在用高德进行转换

代码如下

 public partial class AddressToLongitudeLatitude : Form
    {
        public JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
        public List<SourceTable> import = new List<SourceTable>();
        public AddressToLongitudeLatitude()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            List<SourceTable> address = GetAddress();

            int count = 0;
            foreach (var item in address)
            {
                string strURL = "http://api.map.baidu.com/geocoder?address=" + item.Address + "&output=json&key=你的api&city=";

                count++;
                string info = GaoDeAnalysis(strURL);

                if (info != "" && info.Contains("location"))
                {
                    //执行反序列化
                    ShowLocation _Personnel = jsonSerializer.Deserialize<ShowLocation>(info);

                    if ((_Personnel != null) && (Convert.ToInt32(_Personnel.status) <= 1) && (_Personnel.result.precise == "1"))
                    {
                        SourceTable toTonLat = new SourceTable();
                        toTonLat.Address = item.Address;
                        //这里是将百度坐标转换为wgs坐标
                        string strLocation = GaoDeAnalysis("http://api.zdoz.net/bd2wgs.aspx?lat=" + _Personnel.result.location.lat + "&lng=" + _Personnel.result.location.lng);

                        location xy = jsonSerializer.Deserialize<location>(strLocation);

                        toTonLat.Lon = xy.lng.ToString();
                        toTonLat.Lat = xy.lat.ToString();
                        toTonLat.TEL = item.TEL;
                        //toTonLat.Precise = 1;
                        toTonLat.Area = item.Area;
                        toTonLat.ReportTime = item.ReportTime;
                        toTonLat.MobileType = item.MobileType;
                        import.Add(toTonLat);
                    }
                    else
                    {
                        getGDAddress(item.Address, item.TEL, item.Area, item.ReportTime, item.MobileType);
                    }
                }
                else
                {
                    getGDAddress(item.Address, item.TEL, item.Area, item.ReportTime, item.MobileType);
                }

                if (count % 100 == 0)
                {
                    Insert();

                    import.Clear();
                    import = null;
                    import = new List<SourceTable>();
                }
            }
            Insert();
            MessageBox.Show("成功");
        }
        public static string GaoDeAnalysis(string url)
        {
            string strResult = "";

            try
            {
                HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;
                req.ContentType = "multipart/form-data";
                req.Accept = "*/*";
                //req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";
                req.UserAgent = "";
                req.Timeout = 30000;//30秒连接不成功就中断 
                req.Method = "GET";
                req.KeepAlive = true;

                HttpWebResponse response = req.GetResponse() as HttpWebResponse;
                using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    strResult = sr.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                strResult = "";
            }
            return strResult;
        }

        public void getGDAddress(string item, string TEL, string Area, string ReportTime, string MobileType)
        {
            string strURLGD = "https://restapi.amap.com/v3/geocode/geo?key=高德key值&address=" + item + "&city=";

            JavaScriptSerializer jsonSerializerGD = new JavaScriptSerializer();

            string infoGD = GaoDeAnalysis(strURLGD);

            if (infoGD != "" && infoGD.Contains("location"))
            {
                infoGD = infoGD.Replace("[]", """");
                infoGD = infoGD.Replace("[", "");
                infoGD = infoGD.Replace("]", "");

                //执行反序列化
                GDInfo _PersonnelGD = jsonSerializer.Deserialize<GDInfo>(infoGD);
                if (_PersonnelGD != null)
                {
                    SourceTable toTonLat = new SourceTable();
                    toTonLat.Address = item;
                    toTonLat.TEL = TEL;
                    string locat = _PersonnelGD.geocodes.location;
                    string[] lonlat = locat.Split(',');
                    if (lonlat.Length == 2)
                    {
                        //这里是将火星坐标转换为WGS坐标
                        string strLocation = GaoDeAnalysis("http://api.zdoz.net/gcj2wgs.aspx?lat=" + lonlat[1] + "&lng=" + lonlat[0]);

                        location xy = jsonSerializer.Deserialize<location>(strLocation);

                        toTonLat.Lon = xy.lng.ToString();
                        toTonLat.Lat = xy.lat.ToString();
                        toTonLat.MobileType = MobileType;
                        toTonLat.Area = Area;
                        toTonLat.ReportTime = ReportTime;
                        import.Add(toTonLat);
                        //toTonLat..ToString();
                    }
                }
            }
        }

        public List<SourceTable> GetAddress()
        {
            List<SourceTable> source = new List<SourceTable>();
            using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = new SqlCommand())
                {
                    cmd.Connection = conn;
                    cmd.CommandText = "select * from SourceTable order by TEL";
                    cmd.CommandType = CommandType.Text;
                    cmd.CommandTimeout = 10 * 60 * 60;
                    using (SqlDataReader sdr = cmd.ExecuteReader())
                    {
                        while (sdr.Read())
                        {
                            SourceTable tab = new SourceTable();
                            tab.Id = Convert.ToInt32(sdr["Id"]);
                            tab.TEL = sdr["TEL"].ToString();
                            tab.Address = sdr["Address"].ToString();
                            tab.ReportTime = sdr["ReportTime"].ToString();
                            tab.MobileType = sdr["MobileType"].ToString();
                            tab.Area = sdr["Area"].ToString();
                            source.Add(tab);
                        }

                    }
                }
                conn.Close();
            }
            return source;
        }

        public void Insert()
        {
            string sqlText = "";
            foreach (var item in import)
            {
                sqlText += "insert into LonLatTable(TEL,Address,Lon,LAT,ReportTime,MobileType,Area) values('" + item.TEL + "','" + item.Address + "','" + item.Lon + "','" + item.Lat + "','" + item.ReportTime + "','" + item.MobileType + "','" + item.Area + "');";
            }
            using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
            {
                conn.Open();
                using (SqlCommand cmd = new SqlCommand())
                {
                    cmd.Connection = conn;
                    cmd.CommandText = sqlText;
                    cmd.CommandType = CommandType.Text;
                    cmd.CommandTimeout = 10 * 60 * 60;
                    object obj = cmd.ExecuteNonQuery();
                }
                conn.Close();
            }
        }
        public class SourceTable
        {
            public int Id { get; set; }
            public string TEL { get; set; }
            public string Address { get; set; }
            public string Lon { get; set; }
            public string Lat { get; set; }
            public string ReportTime { get; set; }
            public string Area { get; set; }
            public string MobileType { get; set; }
        }

        public class ShowLocation
        {
            public string status { get; set; }
            public result result { get; set; }
        }

        public class result
        {
            public location location { get; set; }
            public string precise { get; set; }
        }

        public class location
        {
            public string lng { get; set; }
            public string lat { get; set; }
        }

        public class GDInfo
        {
            public string status { get; set; }
            public string info { get; set; }
            public string infocode { get; set; }
            public string count { get; set; }
            public geocodes geocodes { get; set; }
        }

        public class geocodes
        {
            public string location { get; set; }
        }
    }