前言

近日在项目中用到了GMap，并且Gmap中使用了高德地图，特此记录一下。

一、Nuget下载Gmap

在Nuget中搜索GMap，选择GMap.NET.Presentatiom进行下载安装。（请注意版本）
在这里插入图片描述

二、代码

1.添加类

添加一个类，让其GMapControl类。
代码如下：

using GMap.NET;
using GMap.NET.MapProviders;
using GMap.NET.Projections;
using GMap.NET.WindowsPresentation;
using System;namespace WpfRiUi.gmap
{public class MapControl : GMapControl {public long ElapsedMilliseconds;}
}

2.加载高德地图

如果使用高德地图，需要实现GMapProvider接口，并添加一些方法

public abstract class AMapProviderBase : GMapProvider{public AMapProviderBase() {MaxZoom = null;RefererUrl = "https://www.amap.com/";}public override PureProjection Projection { get { return MercatorProjection.Instance; }}GMapProvider[] overlays;public override GMapProvider[] Overlays {get {if (overlays == null) { overlays = new GMapProvider[] { this };}return overlays;}}}

实现AMapProviderBase

using GMap.NET;
using GMap.NET.MapProviders;
using GMap.NET.Projections;
using GMap.NET.WindowsPresentation;
using System;namespace WpfRiUi.gmap
{public class MapControl : GMapControl {public long ElapsedMilliseconds;}public abstract class AMapProviderBase : GMapProvider{public AMapProviderBase() {MaxZoom = null;RefererUrl = "https://www.amap.com/";}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 AMapProvider : AMapProviderBase{public static readonly AMapProvider Instance;readonly Guid id = new Guid("EF3DD303-3F74-4938-BF40-232D0595EE88");public override Guid Id{get { return id; }}readonly string name = "AMap";public override string Name{get{return name;}}static AMapProvider(){Instance = new AMapProvider();}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){//string url = string.Format(UrlFormat, num, pos.X, pos.Y, zoom);string url = string.Format(UrlFormat, pos.X, pos.Y, zoom);Console.WriteLine("url:" + url);return url;}//static readonly string UrlFormat = "http://webrd04.is.autonavi.com/appmaptile?x={0}&y={1}&z={2}&lang=zh_cn&size=1&scale=1&style=7";static readonly string UrlFormat = "http://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=7&x={0}&y={1}&z={2}";}        }

在xaml中使用

在window标签中引入xmlns:src=“clr-namespace:WpfRiUi.gmap”，也就前面我们写的类。然后在显示区域加入如下代码。

 <src:MapControl Grid.Row="0" x:Name="MainMap" Zoom="13" MaxZoom="24" MinZoom="1"/>

在主窗口中加载地图
首先先写一个地图加载方法

        private void Map_Loaded(){try{System.Net.IPHostEntry e = System.Net.Dns.GetHostEntry("ditu.google.cn");}catch{MainMap.Manager.Mode = AccessMode.CacheOnly;System.Windows.MessageBox.Show("没有可用的internet连接，正在进入缓存模式!", "提示", MessageBoxButton.OK, MessageBoxImage.Warning);}MainMap.CacheLocation = Environment.CurrentDirectory + "\\GMapCache\\"; //缓存位置MainMap.MapProvider = AMapProvider.Instance; //加载高德地图MainMap.MinZoom = 2;  //最小缩放MainMap.MaxZoom = 17; //最大缩放MainMap.Zoom = 8;     //当前缩放MainMap.ShowCenter = false; //不显示中心十字点MainMap.DragButton = MouseButton.Left; //右键拖拽地图MainMap.Position = new PointLatLng(39.909149, 116.397486); //地图中心位置：北京//MainMap.MouseLeftButtonDown += new MouseButtonEventHandler(mapControl_MouseLeftButtonDown);}

然后不要忘了在窗口初始化时调用

 public MainWindow(){InitializeComponent();Rect rc = SystemParameters.WorkArea; //获取工作区大小this.Left = 0; //设置位置this.Top = 0;this.Width = rc.Width;this.Height = rc.Height;this.Map_Loaded();//加载地图}