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GMap.NET - Great Maps for Windows Forms and Presentation

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16 Apr 2013MIT1 min read 1.7M   599   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
Software Developer
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Comments and Discussions

 
GeneralRe: proxy authentication Pin
Joevdl26-May-11 21:50
Joevdl26-May-11 21:50 
General403 Forbidden Pin
zahra nessri14-May-11 21:11
zahra nessri14-May-11 21:11 
GeneralRe: 403 Forbidden Pin
radioman.lt15-May-11 21:40
radioman.lt15-May-11 21:40 
Generaldisplay marker with a circle showing a fixed distance Pin
Member 228177114-May-11 3:01
Member 228177114-May-11 3:01 
GeneralRe: display marker with a circle showing a fixed distance Pin
radioman.lt15-May-11 21:39
radioman.lt15-May-11 21:39 
GeneralRe: display marker with a circle showing a fixed distance Pin
Member 228177116-May-11 8:41
Member 228177116-May-11 8:41 
GeneralRe: display marker with a circle showing a fixed distance Pin
radioman.lt16-May-11 21:42
radioman.lt16-May-11 21:42 
GeneralIs there a way of detecting which route is which? Pin
Joe Sonderegger12-May-11 0:41
Joe Sonderegger12-May-11 0:41 
Hello.
I have been looking at the code and have tried to find a way of detecting which route is which when I fly over with the mouse.
Do you know if this is possible? I am using the wpf version...
Have a nice life!!

GeneralRe: Is there a way of detecting which route is which? Pin
radioman.lt12-May-11 0:44
radioman.lt12-May-11 0:44 
Generalerror while loading windowsform project >>> The tools version "4.0" is unrecognized Pin
Member 22817717-May-11 6:09
Member 22817717-May-11 6:09 
GeneralRe: error while loading windowsform project >>> The tools version "4.0" is unrecognized Pin
radioman.lt7-May-11 7:42
radioman.lt7-May-11 7:42 
GeneralRe: error while loading windowsform project >>> The tools version "4.0" is unrecognized Pin
Member 22817719-May-11 10:48
Member 22817719-May-11 10:48 
GeneralIs it possible to change opacity of map? Pin
Joe Sonderegger2-May-11 22:15
Joe Sonderegger2-May-11 22:15 
GeneralRe: Is it possible to change opacity of map? Pin
radioman.lt2-May-11 22:26
radioman.lt2-May-11 22:26 
GeneralRe: Is it possible to change opacity of map? Pin
Joe Sonderegger3-May-11 1:34
Joe Sonderegger3-May-11 1:34 
GeneralRe: Is it possible to change opacity of map? Pin
radioman.lt3-May-11 1:41
radioman.lt3-May-11 1:41 
GeneralRe: Is it possible to change opacity of map? Pin
Joe Sonderegger12-May-11 0:34
Joe Sonderegger12-May-11 0:34 
QuestionGoogle Maps zoom slider Pin
p4t0721-Apr-11 12:50
p4t0721-Apr-11 12:50 
AnswerRe: Google Maps zoom slider Pin
radioman.lt21-Apr-11 20:27
radioman.lt21-Apr-11 20:27 
GeneralHow to make the control active or inactive Pin
Member 228177120-Apr-11 9:36
Member 228177120-Apr-11 9:36 
GeneralRe: How to make the control active or inactive Pin
radioman.lt20-Apr-11 22:33
radioman.lt20-Apr-11 22:33 
GeneralRe: How to make the control active or inactive Pin
Member 228177120-Apr-11 22:40
Member 228177120-Apr-11 22:40 
GeneralRe: How to make the control active or inactive Pin
radioman.lt20-Apr-11 22:47
radioman.lt20-Apr-11 22:47 
GeneralRe: How to make the control active or inactive Pin
Member 228177120-Apr-11 23:05
Member 228177120-Apr-11 23:05 
GeneralHow to display a route Pin
Member 228177120-Apr-11 0:45
Member 228177120-Apr-11 0:45 

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