[mapguide-users] Listing Active selected feature C#

Knight, Gregory Gregory.Knight.bra at cityofboston.gov
Sun Jan 21 13:43:09 EST 2007

I have a C# example where I am doing exactly this. I can send you the page via separate means if you are interested.


From: mapguide-users-bounces at lists.osgeo.org on behalf of Nimrod Cnaan
Sent: Sat 1/20/2007 9:13 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] Listing Active selected feature C#

I am attempting to get the list of selected parcels by using "Invoke URL"
command, passing "$Current Selection" to my "listdwfparcels.aspx" page,
through the key & value pair.

I don't know what I'm doing wrong, getting unclassified exception
"MgSelection.FromXml" . . .

Checking the value of my mgkey content "$Current Selection" returns:


Here is portion of the code that I'm using -

String mgSessionId = GetParameters()["SESSION"];
String mgSelection = GetParameters()["mgkey"];
MgResourceIdentifier layerFeatureResource;
MgReadOnlyLayerCollection layers;
MgSelection selection;
MgLayer layer;
string layerClassName;
string selectionString;
string layerFeatureId;

  MgUserInformation userInfo = new MgUserInformation(mgSessionId);
  MgSiteConnection siteConnection = new MgSiteConnection();

  MgResourceService resourceService =
siteConnection.CreateService(MgServiceType.ResourceService) as
  MgFeatureService featureService =
siteConnection.CreateService(MgServiceType.FeatureService) as
  MgFeatureQueryOptions queryOptions = new MgFeatureQueryOptions();
  MgMap map = new MgMap();
  map.Open(resourceService, "HaifaMap");
if (GetParameters()["SESSION"] != "")
    selection = new MgSelection(map, mgSelection);

<<<<< MY ERROR >>>>>
An unclassified exception occurred.An unclassified exception occurred.
Exception occurred in method MgSelection.FromXml at line 158 in file

Nimrod Cnaan - GIS Senior Programmer
Haifa Municipality, Israel

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