Question

I’m sort of newbie to programming & while making my way to learning, I’m stuck at a point. I’ve made an android application to send GPS co-ordinates of a device to my web-server. Now, I’m onto developing a native Windows app using Forms to fetch geo-locations from the server & show a map to the user. I’m successfully fetching JSON from the server, writing data to a cache (text) file locally & reading the points. But no way I can find to show map from the data!

I searched a lot, found GMap.NET library, but no working samples for VB.NET to make it that clear for me understand.

I know, it would have been easier through a web control, but I really need to keep it non-IE driven.

I’d love to have your suggestions.

Answer 1

The documentation for the GMap.NET is quite lacking but if you take the time to explore the properties and methods it provides appears quite easy to use.

Here’s a quick sample that should get you started:

First of all, create an empty Form in a VB.NET solution and add a reference to the three DLLs provided by the GMap.NET library.

Then, paste this code into your Form1.vb:

Imports GMap.NET
Imports GMap.NET.MapProviders

Public Class Form1
    Private map As GMap.NET.WindowsForms.GMapControl

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        map = New WindowsForms.GMapControl()
        Me.Controls.Add(map)

        map.Dock = DockStyle.Fill

        With map
            ' Home sweet home...
            .Position = New PointLatLng(19.442288, -70.652266)

            .MapProvider = MapProviders.GoogleMapProvider.Instance
            .MinZoom = 3
            .MaxZoom = 17
            .Zoom = 16
            .Manager.Mode = AccessMode.ServerAndCache
        End With
    End Sub
End Class

For further assistance with the control you should contact the authors directly:
http://greatmaps.codeplex.com/discussions