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GMap.NET - Great Maps for Windows Forms and Presentation

, 16 Apr 2013
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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

About the Author

radioman.lt
Software Developer
Lithuania Lithuania
No Biography provided

Comments and Discussions

 
QuestionReally wished this worked. PinmemberDaniel Krusky27-Jul-14 7:22 
AnswerRe: Really wished this worked. Pinpremiumradioman.lt1 hr 45mins ago 
Questionmultiple Marker Cursor freeze to "Hand" PinmemberMember 1058111922-Feb-14 3:19 
AnswerRe: multiple Marker Cursor freeze to "Hand" Pinmemberradioman.lt22-Feb-14 7:52 
GeneralRe: multiple Marker Cursor freeze to "Hand" Pinmemberwilli-5824-Feb-14 15:47 
QuestionGood job! Pinmemberg0d20127-Jan-14 19:06 
GeneralMy vote of 5 PinmemberThatsAlok8-Nov-13 2:01 
GeneralMy vote of 1 Pinmemberdavemaster995-Jul-13 12:58 
GeneralRe: My vote of 1 Pinmemberradioman.lt7-Jul-13 10:12 
GeneralRe: My vote of 1 Pinmemberdavemaster997-Jul-13 15:38 
GeneralMy vote of 2 PinmemberGregoryW28-Apr-13 23:26 
QuestionCan't Browse at CP PinmemberAlan Burkhart22-Apr-13 13:33 
AnswerRe: Can't Browse at CP PinmemberSteveQ5622-Apr-13 21:33 
GeneralRe: Can't Browse at CP Pinmemberradioman.lt22-Apr-13 21:35 
works just fine with opera, my favorite too ;}
d{^__^}b - it's time to fly

GeneralRe: Can't Browse at CP PinmemberAlan Burkhart23-Apr-13 13:06 
GeneralMy vote of 5 PinmemberPrasad Khandekar16-Apr-13 9:15 
QuestionHow to cache maps? PinmemberS.Faizan.Ali15-Apr-13 19:34 
AnswerRe: How to cache maps? Pinmemberradioman.lt16-Apr-13 0:22 
QuestionMapControl does not contain the properties of MapType and CurrentPosition Pinmemberjhyap858-Apr-13 15:20 
AnswerRe: MapControl does not contain the properties of MapType and CurrentPosition Pinmemberradioman.lt8-Apr-13 20:17 
GeneralRe: MapControl does not contain the properties of MapType and CurrentPosition Pinmemberjhyap858-Apr-13 21:18 
GeneralRe: MapControl does not contain the properties of MapType and CurrentPosition Pinmemberradioman.lt8-Apr-13 22:23 
GeneralRe: MapControl does not contain the properties of MapType and CurrentPosition Pinmemberjhyap859-Apr-13 3:14 
GeneralRe: MapControl does not contain the properties of MapType and CurrentPosition Pinmemberjhyap859-Apr-13 15:19 
QuestionNo instance of MainMap or: is there any Documentation or How to? [modified] PinmemberMember 99643873-Apr-13 23:33 

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