Click here to Skip to main content
Click here to Skip to main content

GMap.NET - Great Maps for Windows Forms and Presentation

, 16 Apr 2013 MIT
Rate this:
Please Sign up or sign in to vote.
GMap.NET is a powerful, free, cross platform, Open Source .NET control. It enables the use of routing, geocoding, and maps from Google, Yahoo!, OpenStreet in Windows Forms and Presentation, and supports caching!

GMapNET/GMapNETv7cp.PNG

Introduction

Google Maps are cool, yeah? But it's useful only in the browser, and is insufficient for real time tracking. It also does not have cache so Google servers are overloaded. This control removes all these deficiencies! It also gives the .NET developer unlimited ability to extend it!

GMap.NET is great and Powerful, Free, cross platform, open source .NET control. Enable use routing, geocoding, directions and maps from Google, Yahoo!, Bing, OpenStreetMap, ArcGIS, Pergo, SigPac, Yandex, Mapy.cz, Maps.lt, iKarte.lv, NearMap, OviMap, CloudMade, WikiMapia, MapQuest in Windows Forms & Presentation, supports caching and runs on windows mobile! 

Background

The basic idea is simple: get the required data from Google/etc., cache it, and use it. Fast, simple, and practical.

Using the Code

It's more than easy. GMap.NET.dll and GMap.NET.WindowsForms.dll contain the user control. Add it to your project and simply use it.

Here are the basic control initial options: 

public MainForm()
{

InitializeComponent();

try
{
   System.Net.IPHostEntry e =
        System.Net.Dns.GetHostEntry("www.google.com");
}
catch
{
   MainMap.Manager.Mode = AccessMode.CacheOnly;
   MessageBox.Show("No internet connection avaible, going to CacheOnly mode.", 
         "GMap.NET - Demo.WindowsForms", MessageBoxButtons.OK,
         MessageBoxIcon.Warning);
}

// config map
MainMap.MapProvider = GMapProviders.OpenStreetMap;
MainMap.Position = new PointLatLng(54.6961334816182, 25.2985095977783);
MainMap.MinZoom = 0;
MainMap.MaxZoom = 24;
MainMap.Zoom = 9;

// add your custom map db provider
//GMap.NET.CacheProviders.MySQLPureImageCache ch = new GMap.NET.CacheProviders.MySQLPureImageCache();
//ch.ConnectionString = @"server=sql2008;User Id=trolis;Persist Security Info=True;database=gmapnetcache;password=trolis;";
//MainMap.Manager.SecondaryCache = ch;

// set your proxy here if need
//GMapProvider.WebProxy = new WebProxy("10.2.0.100", 8080);
//GMapProvider.WebProxy.Credentials = new NetworkCredential("ogrenci@bilgeadam.com", "bilgeada");

// map events
{
   MainMap.OnPositionChanged += new PositionChanged(MainMap_OnPositionChanged);

   MainMap.OnTileLoadStart += new TileLoadStart(MainMap_OnTileLoadStart);
   MainMap.OnTileLoadComplete += new TileLoadComplete(MainMap_OnTileLoadComplete);

   MainMap.OnMapZoomChanged += new MapZoomChanged(MainMap_OnMapZoomChanged);
   MainMap.OnMapTypeChanged += new MapTypeChanged(MainMap_OnMapTypeChanged);

   MainMap.OnMarkerClick += new MarkerClick(MainMap_OnMarkerClick);
   MainMap.OnMarkerEnter += new MarkerEnter(MainMap_OnMarkerEnter);
   MainMap.OnMarkerLeave += new MarkerLeave(MainMap_OnMarkerLeave);

   MainMap.OnPolygonEnter += new PolygonEnter(MainMap_OnPolygonEnter);
   MainMap.OnPolygonLeave += new PolygonLeave(MainMap_OnPolygonLeave);

   MainMap.OnRouteEnter += new RouteEnter(MainMap_OnRouteEnter);
   MainMap.OnRouteLeave += new RouteLeave(MainMap_OnRouteLeave);

   MainMap.Manager.OnTileCacheComplete += new TileCacheComplete(OnTileCacheComplete);
   MainMap.Manager.OnTileCacheStart += new TileCacheStart(OnTileCacheStart);
   MainMap.Manager.OnTileCacheProgress += new TileCacheProgress(OnTileCacheProgress);
}   
} 

As you can see, the control options are quite simple. And there is nothing more to add.

Points of Interest

Well, it was quite cryptic to figure out how Google manages tiles, what coordinate system it uses, the JSON decryption, etc.

History

Go to the project's CodePlex site to get a running update of any changes or improvements I've made.  

License

This article, along with any associated source code and files, is licensed under The MIT License

Share

About the Author

radioman.lt
Software Developer
Lithuania Lithuania
No Biography provided

Comments and Discussions

 
AnswerRe: SOURCE CODE Pinmemberradioman.lt16-May-12 1:20 
GeneralRe: SOURCE CODE PinmemberQismet16-May-12 1:35 
QuestionI need to use address instead of lat and lng? PinmemberBen Paxton14-Mar-12 3:06 
AnswerRe: I need to use address instead of lat and lng? Pinmemberradioman.lt14-Mar-12 4:10 
GeneralRe: I need to use address instead of lat and lng? PinmemberBen Paxton14-Mar-12 5:34 
GeneralRe: I need to use address instead of lat and lng? Pinmemberradioman.lt14-Mar-12 6:22 
QuestionSome simple documentation for GMap.Net Pinmembersmartradio13-Mar-12 3:20 
QuestionExample don´t working in C# 2008 Pinmembersmartradio13-Mar-12 3:18 
AnswerRe: Example don´t working in C# 2008 Pinmemberradioman.lt13-Mar-12 3:30 
GeneralRe: Example don´t working in C# 2008 Pinmembersmartradio13-Mar-12 5:16 
Questionoffline maps Pinmembermojimoj29-Feb-12 1:25 
AnswerRe: offline maps [modified] Pinmemberradioman.lt29-Feb-12 2:44 
Questionnice app PinmemberCIDev14-Feb-12 12:22 
AnswerRe: nice app Pinmemberradioman.lt14-Feb-12 23:11 
QuestionPb in using GMap contril in C++.NET Pinmembergilmegviv31-Jan-12 12:11 
AnswerRe: Pb in using GMap contril in C++.NET Pinmemberradioman.lt31-Jan-12 21:53 
GeneralRe: Pb in using GMap contril in C++.NET Pinmembergilmegviv2-Feb-12 10:11 
QuestionHow do I load a TMS that was created using maptiler and Geotiff PinmemberAndrew Mellon20-Dec-11 13:58 
AnswerRe: How do I load a TMS that was created using maptiler and Geotiff Pinmemberradioman.lt20-Dec-11 21:34 
GeneralRe: How do I load a TMS that was created using maptiler and Geotiff PinmemberAndrew Mellon21-Dec-11 10:24 
GeneralRe: How do I load a TMS that was created using maptiler and Geotiff PinmemberAndrew Mellon22-Dec-11 10:37 
GeneralRe: How do I load a TMS that was created using maptiler and Geotiff Pinmemberradioman.lt22-Dec-11 10:56 
GeneralRe: How do I load a TMS that was created using maptiler and Geotiff Pinmemberkenzai27-Dec-11 23:12 
QuestionBlank Map PinmemberBabsitz7-Dec-11 7:20 
AnswerRe: Blank Map Pinmemberradioman.lt7-Dec-11 8:21 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web03 | 2.8.1411023.1 | Last Updated 16 Apr 2013
Article Copyright 2009 by radioman.lt
Everything else Copyright © CodeProject, 1999-2014
Layout: fixed | fluid