深入理解最强桌面地图控件GMAP.NET ---[更新]百度地图

之前写了篇博文，深入理解最强桌面地图控件GMAP.NET --- 百度地图

但是很多回复说百度地图更新了，不能显示百度的离线地图。之前承诺说是国庆节更新，最近才更新。代码已经提交到：

https://code.google.com/p/ypmap/

 

其实算法都是一样的，只是链接变了,

//原来：http://q3.baidu.com/it/u=x=721;y=209;z=12;v=014;type=web&fm=44
//更新：http://online1.map.bdimg.com/tile/?qt=tile&x=23144&y=6686&z=17&styles=pl

因此只要将BaiduMapProviderBase改成下面的代码即可

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Globalization;

using System.Text;

using System.Xml;

using GMap.NET.Internals;

using GMap.NET.MapProviders;

using GMap.NET.Projections;



namespace GMap.NET.GMap.NET.MapProviders.Baidu

{

    public abstract class BaiduMapProviderBase : GMapProvider

    {

        private string ClientKey = "1308e84a0e8a1fc2115263a4b3cf87f1";

        public BaiduMapProviderBase()

        {

            MaxZoom = null;

            RefererUrl = "http://map.baidu.com";

            Copyright = string.Format("©{0} Baidu Corporation, ©{0} NAVTEQ, ©{0} Image courtesy of NASA", DateTime.Today.Year);    

        }



        public override PureProjection Projection

        {

            get { return MercatorProjection.Instance; }

        }



        GMapProvider[] overlays;

        public override GMapProvider[] Overlays

        {

            get

            {

                if (overlays == null)

                {

                    overlays = new GMapProvider[] { this };

                }

                return overlays;

            }

        }

    }



    public class BaiduMapProvider : BaiduMapProviderBase

    {

        public static readonly BaiduMapProvider Instance;



        readonly Guid id = new Guid("608748FC-5FDD-4d3a-9027-356F24A755E5");

        public override Guid Id

        {

            get { return id; }

        }



        readonly string name = "BaiduMap";

        public override string Name

        {

            get

            {

                return name;

            }

        }



        static BaiduMapProvider()

        {

            Instance = new BaiduMapProvider();

        }



        public override PureImage GetTileImage(GPoint pos, int zoom)

        {

            string url = MakeTileImageUrl(pos, zoom, LanguageStr);



            return GetTileImageUsingHttp(url);

        }



        string MakeTileImageUrl(GPoint pos, int zoom, string language)

        {

            zoom = zoom - 1;

            var offsetX = Math.Pow(2, zoom);

            var offsetY = offsetX - 1;



            var numX = pos.X - offsetX;

            var numY = -pos.Y + offsetY;



            zoom = zoom + 1;

            var num = (pos.X + pos.Y)%8 + 1;

            var x = numX.ToString().Replace("-", "M");

            var y = numY.ToString().Replace("-", "M");



            //原来：http://q3.baidu.com/it/u=x=721;y=209;z=12;v=014;type=web&fm=44

            //更新：http://online1.map.bdimg.com/tile/?qt=tile&x=23144&y=6686&z=17&styles=pl

            string url = string.Format(UrlFormat, x, y, zoom);

            Console.WriteLine("url:" + url);

            return url;

        }





        static readonly string UrlFormat = "http://online1.map.bdimg.com/tile/?qt=tile&x={0}&y={1}&z={2}&styles=pl";

        

    }

}