This is the definitive answer to your question: ASP.NET Qick Example, incomplete: doesn't handle memory - *you must dispose all*...
<%@ 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; } 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; //TODO: fullfill catch / fullfill finally //IMPORTANT: dispose all in finally!!! 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: 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) _csvShowLayers += ","; _csvShowLayers += layerBase.GetObjectId(); ++iShow; } else if (layername == "Hydrography") { if (iShow > 0) _csvShowLayers += ","; _csvShowLayers += layerBase.GetObjectId(); ++iShow; } else { //TODO: use StringBuilder if (iHid > 0) _csvHideLayers += ","; _csvHideLayers += layerBase.GetObjectId(); ++iHid; } } //------------------------------------------------ //------------------------------------------------ //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 { //TODO: dispose } } </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/";; var mg_url = addrs + "mapguide/mapagent/mapagent.fcgi?USERNAME=Anonymous&"; var metersPerUnit = 111319.4908; //value returned from mapguide 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() { 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 }; var params = {}; params.mapName = '<%= GetMapName() %>'; params.session = '<%= GetMapSession() %>'; params.hideLayers = '<%= GetHidelayers() %>'; params.showLayers = '<%= GetShowlayers() %>'; 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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