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GMap.NET - Great Maps for Windows Forms and Presentation

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4.80/5 (135 votes)
16 Apr 2013MIT1 min read 1.8M   606   508   373
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: 

C#
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


Written By
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Comments and Discussions

 
GeneralMy vote of 5 Pin
Sergio Andrés Gutiérrez Rojas2-Nov-11 15:25
Sergio Andrés Gutiérrez Rojas2-Nov-11 15:25 
QuestionIs it possible to get Google POI data and show them on the map ? Pin
Jimz Rend21-Aug-11 21:38
Jimz Rend21-Aug-11 21:38 
AnswerRe: Is it possible to get Google POI data and show them on the map ? Pin
radioman.lt22-Aug-11 1:07
radioman.lt22-Aug-11 1:07 
GeneralRe: Is it possible to get Google POI data and show them on the map ? [modified] Pin
Jimz Rend22-Aug-11 18:00
Jimz Rend22-Aug-11 18:00 
QuestionOutOfRangeException in TileMatrix.GetTileWithNoLock() Pin
BloodyBaron17-Aug-11 10:16
BloodyBaron17-Aug-11 10:16 
AnswerRe: OutOfRangeException in TileMatrix.GetTileWithNoLock() Pin
radioman.lt17-Aug-11 10:27
radioman.lt17-Aug-11 10:27 
GeneralRe: OutOfRangeException in TileMatrix.GetTileWithNoLock() Pin
BloodyBaron17-Aug-11 10:33
BloodyBaron17-Aug-11 10:33 
GeneralRe: OutOfRangeException in TileMatrix.GetTileWithNoLock() Pin
radioman.lt17-Aug-11 10:37
radioman.lt17-Aug-11 10:37 
GeneralRe: OutOfRangeException in TileMatrix.GetTileWithNoLock() Pin
BloodyBaron17-Aug-11 10:45
BloodyBaron17-Aug-11 10:45 
QuestionIs it possible to use custom marker like my own image ? Pin
Jimz Rend8-Aug-11 22:17
Jimz Rend8-Aug-11 22:17 
AnswerRe: Is it possible to use custom marker like my own image ? Pin
radioman.lt9-Aug-11 0:26
radioman.lt9-Aug-11 0:26 
GeneralRe: Is it possible to use custom marker like my own image ? Pin
Jimz Rend9-Aug-11 17:31
Jimz Rend9-Aug-11 17:31 
QuestionSVN repository available? Pin
BloodyBaron5-Aug-11 11:49
BloodyBaron5-Aug-11 11:49 
AnswerRe: SVN repository available? Pin
radioman.lt5-Aug-11 21:20
radioman.lt5-Aug-11 21:20 
QuestionAwesome control Pin
Mike Hankey31-Jul-11 8:32
mveMike Hankey31-Jul-11 8:32 
AnswerRe: Awesome control Pin
radioman.lt31-Jul-11 10:30
radioman.lt31-Jul-11 10:30 
QuestionGetplacemarkfromgeocoder problem Pin
p4t0722-Jul-11 4:29
p4t0722-Jul-11 4:29 
AnswerRe: Getplacemarkfromgeocoder problem Pin
radioman.lt25-Jul-11 9:09
radioman.lt25-Jul-11 9:09 
QuestionGmap Control Pin
victorm2nu3l25-Jun-11 13:54
victorm2nu3l25-Jun-11 13:54 
AnswerRe: Gmap Control Pin
radioman.lt25-Jun-11 14:25
radioman.lt25-Jun-11 14:25 
GeneralJitter in WPF version Pin
Joe Sonderegger14-Jun-11 5:34
Joe Sonderegger14-Jun-11 5:34 
GeneralRe: Jitter in WPF version Pin
radioman.lt14-Jun-11 6:29
radioman.lt14-Jun-11 6:29 
GeneralRe: Jitter in WPF version Pin
Joe Sonderegger14-Jun-11 20:07
Joe Sonderegger14-Jun-11 20:07 
GeneralRe: Jitter in WPF version Pin
Joe Sonderegger8-Jul-11 0:20
Joe Sonderegger8-Jul-11 0:20 
GeneralRe: Jitter in WPF version Pin
radioman.lt8-Jul-11 1:23
radioman.lt8-Jul-11 1:23 

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