Dear Friends, This is to inform you that I had struggled a lot to GetFeatureInfo working on the ASP.NET platform(on windowsXP, IIS 5.1 and Visual Studio 2008). I would like to put on record the main points of the solution so that another guy need not have to break his head in order to get it working. I had made several posts in order to understand the different concepts involved in it.The posts are:
http://n2.nabble.com/getting-Feature-Info-data-directly-from-shp-files-td4767879.html#a4767879 http://n2.nabble.com/Get-Feature-Info-in-pop-up-working-example-td4773944.html#a4773944 http://n2.nabble.com/WFS-map-from-shapefiles-td4795937.html#a4795937 http://n2.nabble.com/Proxy-problem-in-GetFeatureInfo-no-solution-td4802810.html#a4802810 http://n2.nabble.com/Opemlayers-loadURL-does-not-work-in-GetFeatureInfo-td4822969.html#a4822969 http://n2.nabble.com/getting-Feature-Info-data-directly-from-shp-files-td4767879.html#a4767879 http://n2.nabble.com/getting-Feature-Info-data-directly-from-shp-files-td4767879.html#a4767879 http://n2.nabble.com/Get-Feature-Info-in-pop-up-working-example-td4773944.html#a4773944 http://n2.nabble.com/WFS-map-from-shapefiles-td4795937.html#a4795937 http://n2.nabble.com/Proxy-problem-in-GetFeatureInfo-no-solution-td4802810.html#a4802810 http://n2.nabble.com/Opemlayers-loadURL-does-not-work-in-GetFeatureInfo-td4822969.html#a4822969 http://n2.nabble.com/Get-Feature-Info-in-pop-up-working-example-td4773944.html#a4773944 http://n2.nabble.com/getting-Feature-Info-data-directly-from-shp-files-td4767879.html#a4767879 http://n2.nabble.com/Get-Feature-Info-in-pop-up-working-example-td4773944.html#a4773944 http://n2.nabble.com/WFS-map-from-shapefiles-td4795937.html#a4795937 http://n2.nabble.com/Proxy-problem-in-GetFeatureInfo-no-solution-td4802810.html#a4802810 http://n2.nabble.com/Opemlayers-loadURL-does-not-work-in-GetFeatureInfo-td4822969.html#a4822969 http://n2.nabble.com/WFS-map-from-shapefiles-td4795937.html#a4795937 http://n2.nabble.com/getting-Feature-Info-data-directly-from-shp-files-td4767879.html#a4767879 http://n2.nabble.com/Get-Feature-Info-in-pop-up-working-example-td4773944.html#a4773944 http://n2.nabble.com/WFS-map-from-shapefiles-td4795937.html#a4795937 http://n2.nabble.com/Proxy-problem-in-GetFeatureInfo-no-solution-td4802810.html#a4802810 http://n2.nabble.com/Opemlayers-loadURL-does-not-work-in-GetFeatureInfo-td4822969.html#a4822969 http://n2.nabble.com/Proxy-problem-in-GetFeatureInfo-no-solution-td4802810.html#a4802810 http://n2.nabble.com/getting-Feature-Info-data-directly-from-shp-files-td4767879.html#a4767879 http://n2.nabble.com/Get-Feature-Info-in-pop-up-working-example-td4773944.html#a4773944 http://n2.nabble.com/WFS-map-from-shapefiles-td4795937.html#a4795937 http://n2.nabble.com/Proxy-problem-in-GetFeatureInfo-no-solution-td4802810.html#a4802810 http://n2.nabble.com/Opemlayers-loadURL-does-not-work-in-GetFeatureInfo-td4822969.html#a4822969 http://n2.nabble.com/Opemlayers-loadURL-does-not-work-in-GetFeatureInfo-td4822969.html#a4822969 Initially there was confusion as to whether GetFeatureInfo can work on a WMS layer or a WFS layer is required from MapServer. Finally it turned out that it works on WMS layer i.e WFS is not required. The GFI code that finally worked is as given below although there are other similar looking code. OpenLayers.ProxyHost = "/cgi-bin/proxy.cgi?url="; //alert('here'); var lon = 74.25; var lat = 20.35; var zoom = 6; map = new OpenLayers.Map('<%=map.ClientID%>'); // layer = new OpenLayers.Layer.WMS("OpenLayers WMS", // "http://localhost:9000/cgi-bin/mapserv.exe?";, { map: '../htdocs/Shape/newwr1rec.map', layers: 'STATE', format: 'png' }); // layer1 = new OpenLayers.Layer.WMS("Rstations", // "http://localhost:9000/cgi-bin/mapserv.exe?";, { map: '../htdocs/Shape/newwr1rec.map', transparent: true, layers: 'RailwayStations', format: 'png' }); //alert(map); layer = new OpenLayers.Layer.WMS("OpenLayers WMS", "/mapserver/mapserv.exe?map=c:/ms4w/apache/htdocs/Shape/newwr1rec.map", { 'layers': 'STATE', transparent: false, format: "image/png" }); layer1 = new OpenLayers.Layer.WMS("OpenLayers WMS", "/mapserver/mapserv.exe?map=c:/ms4w/apache/htdocs/Shape/newwr1rec.map", { 'layers': 'RailwayStations', transparent: true, format: "image/png" }); //alert(layer); map.addLayers([layer, layer1]); //layer = new OpenLayers.Layer.WFS("OpenLayers WFS", "http://127.0.0.1:9000/cgi-bin/mapserv.exe?map=d:/ms4w/apache/htdocs/Shape/newwr1.map";, { typename: 'STATE', maxfeatures: 6 }, { featureClass: OpenLayers.Feature.WFS }); ///map.addLayer(layer); map.setCenter(new OpenLayers.LonLat(lon, lat), zoom); map.addControl(new OpenLayers.Control.LayerSwitcher()); map.events.register('click', map, function(e) { //alert('clicked'); OpenLayers.Util.getElement('nodeList').innerHTML = "Loading... please wait..."; var url = layer1.getFullRequestString({ REQUEST: "GetFeatureInfo", EXCEPTIONS: "application/vnd.ogc.se_xml", BBOX: layer1.map.getExtent().toBBOX(), X: e.xy.x, Y: e.xy.y, INFO_FORMAT: 'text/plain', QUERY_LAYERS: layer1.params.LAYERS, FEATURE_COUNT: 1, WIDTH: map.size.w, HEIGHT: map.size.h }); // var msg = document.getElementById('urlmsg'); // msg.value = url; alert(url, "getfeatureinfo", "location=0,status=0,scrollbars=1,width=800,height=400"); ///window.open(url, '', this, setHTML, setHTML); OpenLayers.loadURL(url, '', this, setHTML); OpenLayers.Event.stop(e); }); Initially I had a few errors in my code but even after correcting them I did not either get an output or got proxy related errors. Then one of the forum members Arnd Wippermann pointed out that since I was using two web servers i.e Apache and IIS, two domains were created and as a result of which GFI request could not go through i.e blocked by proxy. While IIS was loading the aspx page,Apache was being used to call mapserver using OL within that aspx page. Then I realized that I need to have one server i.e IIS do both the things i.e load the aspx page as well as call mapserver within the aspx page. So I configured IIS 5.1 to call mapserver(cgi executable) and after that the above code started working. How to configure IIS 5.1 to directly call Mapserver? Please refer to the attached document. If you need help regarding configuring IIS 6.0/7.0 let me know. The solution I have stated above could not be found anywhere in the Internet, could only find people with problems with respect to GFI and no solution whatsoever. I hope this solution will go a long way in solving the issues surrounding GFI,especially those using the ASP.NET platform. Thanks to all members who participated in my posts and tried to help me. Special Thanks to Arnd Wippermann for correcting my errors in code and also for explaining the concept of two domains being created due to the use of two web servers and how to avoid the proxy by having everything in one domain.He cleared most of my doubts as a result of which there is a working solution now. -- View this message in context: http://n2.nabble.com/GetFeatureInfo-on-ASP-NET-platform-with-MapServer-finally-working-tp4888713p4888713.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users
