This is a simple example using ASP.NET and OpenLayers using the usual Sheboygan example. Sorry but I don't know yet how to load legend. For the selection I have not tried yet, but OpenLayers accepts the xml returned by selection in params, so using selection as in MapGuide Dev''s guide should work [see comment in code] - I didn't tested. For tooltips you can query the server on mouse move, standard AJAX stuff, but I would do it only in intranets or with big server power, otherwise you would be bombing the server with requests. To have more layers, you can add an overlay [*in options useOverlay=true, useAsyncOverlay=true, the second only for MapGuide>=2.1*] using the same session, just changing show/hide layers string. And yes, to come up with the following code was really hard! NOTE: call in *Global.asax* MapGuideApi.MgInitializeWebTier(Webconfig Ini Physical Path);
*Devs guide says this shoul be called on every request, I call it once in Global.asax, and it works. I don't know more and haven't found any info!* <%@ Page Language="C#" %> <%@ Import Namespace="OSGeo.MapGuide" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";> <script runat="server"> private string _strSessionId = ""; private string _mapName = ""; string _csvShowLayers = ""; string _csvHideLayers = ""; protected string GetMapName() { return _mapName; } protected string GetMapSession() { return _strSessionId; } protected string GetShowlayers() { return _csvShowLayers; } protected string GetHidelayers() { return _csvHideLayers; } private void MgDispose(MgDisposable obj) { if (obj != null) obj.Dispose(); } protected void Page_Load(object sender, EventArgs e) { MgUserInformation userInfo = null; MgSiteConnection siteConnection = null; MgSite site = null; MgResourceIdentifier resourceId = null; MgMappingService mappingService = null; MgMap map = null; MgResourceService resourceService = null; MgSelection selection = null; MgLayerCollection lColl = null; MgLayerBase layerBase = null; MgResourceIdentifier sessionIdResourceIdentifier = null; try { userInfo = new MgUserInformation("Anonymous", ""); siteConnection = new MgSiteConnection(); siteConnection.Open(userInfo); site = siteConnection.GetSite(); _strSessionId = site.CreateSession(); //--------------------------------------------------- //Save new mapguide session userInfo.SetMgSessionId(_strSessionId); //--------------------------------------------------- resourceId = new MgResourceIdentifier("Library://Samples/Sheboygan/Maps/Sheboygan.MapDefinition"); _mapName = resourceId.GetName(); //------------------------------------------------ //Layers objectId mappingService = (MgMappingService)siteConnection.CreateService(MgServiceType.MappingService); map = new MgMap(); resourceService = siteConnection.CreateService(MgServiceType.ResourceService) as MgResourceService; map.Create(resourceService, resourceId, _mapName); lColl = map.GetLayers(); int iMax = lColl.Count; //Let's show only Districts & Hydrography: StringBuilder sbShow = new StringBuilder(); StringBuilder sbHide = new StringBuilder(); int iHid = 0, iShow = 0; for (int i = 0; i < iMax; ++i) { if (null != layerBase) layerBase.Dispose(); layerBase = lColl[i]; string layername = layerBase.GetName(); if (layername == "Districts") { if (iShow > 0) sbShow.Append(","); sbShow.Append(layerBase.GetObjectId()); ++iShow; } else if (layername == "Hydrography") { if (iShow > 0) sbShow.Append(","); sbShow.Append(layerBase.GetObjectId()); ++iShow; } else { if (iHid > 0) sbHide.Append(","); sbHide.Append(layerBase.GetObjectId()); ++iHid; } } _csvHideLayers = sbHide.ToString(); _csvShowLayers = sbShow.ToString(); //------------------------------------------------ //------------------------------------------------ //Necessary to show maps: selection = new MgSelection(map); selection.Save(resourceService, _mapName); sessionIdResourceIdentifier = new MgResourceIdentifier( String.Concat("Session:", _strSessionId, "//", _mapName, ".", MgResourceType.Map)); map.Save(resourceService, sessionIdResourceIdentifier); //------------------------------------------------ } catch { throw;//TODO: Handle exceptions } finally { MgDispose(sessionIdResourceIdentifier); MgDispose(selection); MgDispose(layerBase); MgDispose(lColl); MgDispose(resourceService); MgDispose(map); MgDispose(resourceId); MgDispose(mappingService); MgDispose(site); MgDispose(siteConnection); MgDispose(userInfo); } } </script> <html xmlns="http://www.w3.org/1999/xhtml";> <head runat="server"> <title></title> <script type="text/javascript" src=" http://www.openlayers.org/api/OpenLayers.js";></script> <style type="text/css"> #map_mg { width: 500px; height:500px; float: left; border:solid 1px #000; } </style> </head> <body onload="init()"> <form id="form1" runat="server"> <div> <h2>Qick example: TODO: Dispose all map guide objects, use StringBuilder, etc...</h2> <h3>Showing only Districts/Hydrography</h3> </div> <div id="map_mg"> </div> </form> <script type="text/javascript"> var addrs = "http://localhost/";; //TODO: get the address of your server var mg_url = addrs + "mapguide/mapagent/mapagent.fcgi?USERNAME=Anonymous&"; var metersPerUnit = 111319.4908; //TODO: get value returned from mapguide on server side var inPerUnit = OpenLayers.INCHES_PER_UNIT.m * metersPerUnit; OpenLayers.INCHES_PER_UNIT["dd"] = inPerUnit; OpenLayers.INCHES_PER_UNIT["degrees"] = inPerUnit; OpenLayers.DOTS_PER_INCH = 96; var _map = null; function init() { //TODO: get extent from mapguide on server side // I usually get extent on server side, I don't write here code, because Double's ToString // in my locle [Italian] gives "," insted of ".", and I have an assembly to make conversion. // You can find howto do it easily on Programmer's guide or on WebApi help var extent = new OpenLayers.Bounds(-87.865114442365922, 43.665065564837931, -87.595394059497067, 43.823852564430069); var mapOptions = { maxExtent: extent, maxResolution: 'auto' }; _map = new OpenLayers.Map('map_mg', mapOptions); var options = { isBaseLayer: true, buffer: 1, useOverlay: false, useAsyncOverlay: false, singleTile: true //, transitionEffect: 'resize' }; var params = {}; params.mapName = '<%= GetMapName() %>'; params.session = '<%= GetMapSession() %>'; params.hideLayers = '<%= GetHidelayers() %>'; params.showLayers = '<%= GetShowlayers() %>'; // - Depending on Groups you can use params.showGroups/hideGroups // - Making a selection os server side, you can get that selection and pass here as param.selectionXml // - I have read somewhere that locale should be passed [and that in some cases is mandatory] too, but it works for me even without var mg_layer = new OpenLayers.Layer.MapGuide("MapGuide Sheboygan map", mg_url, params, options); _map.addLayer(mg_layer); _map.addControl(new OpenLayers.Control.MousePosition()); _map.zoomToMaxExtent(); } </script> </body> </html> Pietro Ianniello
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