[mapguide-users] Zoom To Selection

Michael G. Byrne MByrne at tonkin.co.nz
Thu Mar 12 16:43:57 EDT 2009


The capability to zoom to a feature (such as by clicking a feature in a list of features found by a search) should be a basic capability of a GIS system - why doesn't Mapguide and fusion have it out of the box?

Michael



From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Nisha P
Sent: Wednesday, 11 March 2009 11:17 p.m.
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] Zoom To Selection

Hi Padmini..
   In which file u wrote this code?or is it an in-built file?
On Thu, Dec 18, 2008 at 3:52 PM, padmini godavarthi <godavarthi.padmini at gmail.com<mailto:godavarthi.padmini at gmail.com>> wrote:


Hi,
Iam using Mapguide Opensource 2.0 (with .net 2.0 +IIS 5.1)

I want to query the parcel_id and zoomed it on the map

may code is


      NameValueCollection serverVars = Request.ServerVariables;
      String strServerVars = "";
      foreach (String str in serverVars.AllKeys)
      {

          strServerVars += "<br>" + str;

      }
      String platform = serverVars["SERVER_SOFTWARE"];
      String queryStr = serverVars["QUERY_STRING"];
      string queryStr1 = serverVars["Form"];
      NameValueCollection requestParams = Request.HttpMethod == "POST" ?
Request.Form : Request.QueryString;
      String sessionId = Request.QueryString["SESSION"];
      //String sessionId = Request.QueryString["SESSION"]; ;

      string realPath = Request.ServerVariables["APPL_PHYSICAL_PATH"];
      String configPath = realPath + "webconfig.ini";
      MapGuideApi.MgInitializeWebTier(configPath);

      MgUserInformation userInfo = new MgUserInformation(sessionId);

      MgSiteConnection siteConnection = new MgSiteConnection();
      siteConnection.Open(userInfo);

      MgResourceService resService =
(MgResourceService)siteConnection.CreateService(MgServiceType.ResourceService);
      MgFeatureService featureService =
(MgFeatureService)siteConnection.CreateService(MgServiceType.FeatureService);

      MgMap map = new MgMap();
      map.Open(resService, "oramap");


      MgFeatureQueryOptions nameQuery = new MgFeatureQueryOptions();

//nameQuery.SetFilter(ConfigurationManager.AppSettings["FieldToFilter"] +
"=" + Globals.gURLParam);
      nameQuery.SetFilter("PARCEL_ID" + "=" + "670_111");
      MgResourceIdentifier parcelId = new
MgResourceIdentifier("Library://Orasample/resora.FeatureSource");
      MgFeatureReader featureReader =
featureService.SelectFeatures(parcelId, "GEOM_TABLE", nameQuery);

      //Highlight the query result on the map
      MgSelection selection = new MgSelection(map);
      MgLayer layer = (MgLayer)map.GetLayers().GetItem("GEOM_TABLE");


      featureReader = featureService.SelectFeatures(parcelId,
"GEOM_TABLE", nameQuery);
      selection.AddFeatures(layer, featureReader, 0);
    String selectXML = selection.ToXml();
      selection.Save(resService, "oramap");
      Page.ClientScript.RegisterStartupScript(Page.GetType(), "test",
"select('" + selectXML + "');", true);
}

but i got an error at

 MgFeatureReader featureReader = featureService.SelectFeatures(parcelId,
"GEOM_TABLE", nameQuery);


1)can u plz tell me what do u man by faeture class name?
from where i will gt it?

Thanks and Regards,
Padmini.
--
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--
Nisha P
IIITM-K
nisha at iiitmk.ac.in<mailto:nisha at iiitmk.ac.in>

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