如何在GMap.net中使用MouseMove返回Lat/Long

Question

我正在尝试用GMap将ac#程序放在一起,我想要将鼠标显示在屏幕底部的坐标.我已经在表单中添加了一个OnMouseMove方法,我确实得到了坐标,但前提是鼠标不在地图上.如果鼠标位于地图上,则不响应.我对c#相当新,所以我可能错过了一些相当简单的东西.有任何想法吗？下面是我现在正在使用的代码.

    public partial class Form1 : Form
{
    protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
    {
        base.OnMouseMove(e);

        if(e.Button == MouseButtons.Left)
        {
            int itest=2;
        }

        double X = mapexplr.FromLocalToLatLng(e.X, e.Y).Lng;
        double Y = mapexplr.FromLocalToLatLng(e.X, e.Y).Lat;


        string longitude = X.ToString();
        string latitude = Y.ToString();
        LongStrip.Text = longitude;
        LatStrip.Text = latitude;
    }

    GMapOverlay overlayOne;

    public Form1()
    {
        InitializeComponent();
    }

    private void mapexplr_Load(object sender, EventArgs e)
    {
        //initialisation de notre map
        mapexplr.MapProvider = GMap.NET.MapProviders.BingMapProvider.Instance;
        GMap.NET.GMaps.Instance.Mode = GMap.NET.AccessMode.ServerAndCache;
        mapexplr.Position = new PointLatLng(35.571458, -85.547961);

        mapexplr.DragButton = MouseButtons.Left;
        mapexplr.SetCurrentPositionByKeywords("Tunisia");
        mapexplr.MapProvider = GMapProviders.BingMap;
        mapexplr.MinZoom = 3;
        mapexplr.MaxZoom = 17;
        mapexplr.Zoom = 5;
        mapexplr.Manager.Mode = AccessMode.ServerAndCache;
        //ajout des overlay
        overlayOne = new GMapOverlay(mapexplr, "OverlayOne");
        //ajout de Markers
        overlayOne.Markers.Add(new GMap.NET.WindowsForms.Markers.GMapMarkerGoogleGreen(new PointLatLng(36.657403, 10.327148)));
        //ajout de overlay à la map
        mapexplr.Overlays.Add(overlayOne);

    }
}

Answer 1

您使用的鼠标移动事件适用于表单而不是 Gmap。只需将您的代码粘贴到 Gmap.Net 鼠标移动事件中即可。另外，您不应该在加载事件中初始化 Gmap，并且看起来您设置了两次地图类型和两次地图位置（一次在突尼斯，一次在 35.571458，-85.547961）。参考如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using GMap.NET;
using GMap.NET.MapProviders;
using GMap.NET.WindowsForms;
using GMap.NET.WindowsForms.Markers;

namespace Code_Test
{
    public partial class Form1 : Form
    {
        GMapOverlay overlayOne = new GMapOverlay();
        public Form1()
        {
            InitializeComponent();

            mapexplr.MapProvider = GMap.NET.MapProviders.BingMapProvider.Instance;

            GMap.NET.GMaps.Instance.Mode = GMap.NET.AccessMode.ServerAndCache;

            mapexplr.Position = new PointLatLng(35.571458, -85.547961);
            mapexplr.DragButton = MouseButtons.Left;
            mapexplr.MinZoom = 3;
            mapexplr.MaxZoom = 17;
            mapexplr.Zoom = 5;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            GMarkerGoogle marker = new GMarkerGoogle(new PointLatLng(36.657403, 10.327148), GMarkerGoogleType.green);
            overlayOne.Markers.Add(marker);
            mapexplr.Overlays.Add(overlayOne);
        }
        private void mapexplr_MouseMove(object sender, MouseEventArgs e)
        {
            base.OnMouseMove(e);

            double X = mapexplr.FromLocalToLatLng(e.X, e.Y).Lng;
            double Y = mapexplr.FromLocalToLatLng(e.X, e.Y).Lat;

            string longitude = X.ToString();
            string latitude = Y.ToString();
            LongStrip.Text = longitude;
            LatStrip.Text = latitude;
        }
    }
}

该代码已经过测试，因此如果您有任何问题请告诉我。如果您还没有，请记住引用 GMap.NET.Core 和 GMap.NET.WindowsForms。