c# gmap.net google marker

Question

我做了一个使用 gmap.net 的应用程序。在地图上，我有三个标记。现在我要做的是单击一个标记打开一个新表单，单击第二个标记以打开另一个表单。这是代码：

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 GMap
{
    public partial class Form1 : Form
    {
        GMarkerGoogle marker;
        GMapOverlay markerOverlay;
        DataTable dt;
        int Selekcija = 0;
        double LatInicial = 43.1383292506958;
        double LngInicial = 20.5198994278908;
        double LatTehnicka = 43.1378458151015;
        double LngTehnicka = 20.5214631557465;
        double LatMedicinska = 43.1324426240355;
        double LngMedicinska = 20.5122631788254;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            dt = new DataTable();
            dt.Columns.Add(new DataColumn("Opis", typeof(string)));
            dt.Columns.Add(new DataColumn("Lat", typeof(double)));
            dt.Columns.Add(new DataColumn("Long", typeof(double)));
            //Ubacivanje podataka u tabelu
            dt.Rows.Add("Gimnazija", LatInicial, LngInicial);
            dt.Rows.Add("Tehnicka skola", LatTehnicka, LngTehnicka);
            dt.Rows.Add("Medicinska skola", LatMedicinska, LngMedicinska);
            dataGridView1.DataSource = dt;
            //Vidljivost pojedinih kolona
            dataGridView1.Columns[1].Visible = false;
            dataGridView1.Columns[2].Visible = false;
            gMapControl1.DragButton = MouseButtons.Left;
            gMapControl1.CanDragMap = true;
            gMapControl1.MapProvider = GMapProviders.GoogleMap;
            gMapControl1.Position = new PointLatLng(LatInicial, LngInicial);
            gMapControl1.MinZoom = 0;
            gMapControl1.MaxZoom = 24;
            gMapControl1.Zoom = 17;
            gMapControl1.AutoScroll = true;
            // Obelezivac
            markerOverlay = new GMapOverlay("markers");
            marker = new GMarkerGoogle(new PointLatLng(LatInicial, LngInicial),GMarkerGoogleType.green);
            markerOverlay.Markers.Add(marker);
            //marker.ToolTipMode = MarkerTooltipMode.Always;
            marker.ToolTipText = string.Format("Gimnazija: n Latituda: {0} n     Longituda: {1}", LatInicial, LngInicial);
            gMapControl1.Overlays.Add(markerOverlay);
            markerOverlay = new GMapOverlay("markers");
            marker = new GMarkerGoogle(new PointLatLng(LatTehnicka, LngTehnicka), GMarkerGoogleType.green);
            markerOverlay.Markers.Add(marker);
            //marker.ToolTipMode = MarkerTooltipMode.Always;
            marker.ToolTipText = string.Format("Tehnicka skola: n Latituda: {0} n Longituda: {1}", LatTehnicka, LngTehnicka);
            gMapControl1.Overlays.Add(markerOverlay);
            markerOverlay = new GMapOverlay("markers");
            marker = new GMarkerGoogle(new PointLatLng(LatMedicinska, LngMedicinska), GMarkerGoogleType.green);
            markerOverlay.Markers.Add(marker);
            //marker.ToolTipMode = MarkerTooltipMode.Always;
            marker.ToolTipText = string.Format("Medicinska skola: n Latituda: {0} n Longituda: {1}", LatMedicinska, LngMedicinska);
            gMapControl1.Overlays.Add(markerOverlay);
        }
        private void button1_Click(object sender, EventArgs e)
        {
            dt.Rows.Add(txtOpis.Text, txtLatituda.Text, txtLongituda.Text);
        }
        private void SelekcijaSkole(object sender, DataGridViewCellMouseEventArgs e)
        {
            Selekcija = e.RowIndex;
            txtOpis.Text = dataGridView1.Rows[Selekcija].Cells[0].Value.ToString();
            txtLatituda.Text = dataGridView1.Rows[Selekcija].Cells[1].Value.ToString();
            txtLongituda.Text = dataGridView1.Rows[Selekcija].Cells[2].Value.ToString();
            marker.Position = new PointLatLng(Convert.ToDouble(txtLatituda.Text), Convert.ToDouble(txtLongituda.Text));
            gMapControl1.Position = marker.Position;
        }
        private void gMapControl1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            double lat = gMapControl1.FromLocalToLatLng(e.X, e.Y).Lat;
            double lng = gMapControl1.FromLocalToLatLng(e.X, e.Y).Lng;
            txtLatituda.Text = lat.ToString();
            txtLongituda.Text = lng.ToString();
            marker.Position = new PointLatLng(lat, lng);
            marker.ToolTipText = string.Format("Koordinate: n Latituda {0} n Longituda {1}", lat, lng);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.RemoveAt(Selekcija);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            gMapControl1.MapProvider = GMapProviders.GoogleChinaSatelliteMap;
        }
        private void button4_Click(object sender, EventArgs e)
        {
            gMapControl1.MapProvider = GMapProviders.GoogleMap;
        }
        private void button5_Click(object sender, EventArgs e)
        {
            gMapControl1.MapProvider = GMapProviders.GoogleTerrainMap;
        }
        private void gMapControl1_OnMarkerClick(GMapMarker item, MouseEventArgs e)
        {
        }
    }
}

Answer 1

gMapControl 有一个名为 OnMarkerClick 的事件，您可以订阅该事件以侦听制作者上的点击事件。 可以右键单击 GmapControl，然后选择"属性"。 然后单击闪电按钮，这将列出您的事件，并且有一个OnMarkerClick事件，您可以双击它，它将为您构建一个事件处理程序，或者您可以这样设置它。

 gMapControl1.OnMarkerClick += (marker, mouseArgs) =>
 {
     // From this point marker is the clicked marker do as you wish here
     // Pass it to another form and use form.show to display the form.
     // MessageBox.Show is to show proof the event fired.
     MessageBox.Show(marker.ToolTipText);
     // If you have a marker form you can display it like so.
     MarkerForm form = new MarkerForm();
     form.Show();
 };

Answer 2

从 GMapControl 的属性中，转到"事件"。有一个名为 OnMarkerClick 的事件。在它上面踢一个事件，如下所示：

private void gmap_OnMarkerClick(GMapMarker item, MouseEventArgs e) {
    if (item.Equals(marker1))
    {
       MessageBox.Show("marker1 clicked");
       // do something else
     
    }
    else if (item.Equals(marker2))
    {
        MessageBox.Show("marker2 clicked");
        // do something else
    }
   ...........
    
}