[mapguide-users] set and zoom to selection

[Knight, Gregory]

I added the code to save the selection after doing the AddFeature.  Im
still getting an 'empty' Xml selection.

 

If I convert the selection to a string, and output that to the task
pane, its comes back as "OSGeo.MapGuide.MgSelection".  If I convert the
selection to Xml, it comes back empty.

 

What am I doing wrong here?

 

________________________________

From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Andy
Morsell
Sent: Thursday, February 01, 2007 5:30 PM
To: 'MapGuide Users Mail List'
Subject: RE: [mapguide-users] set and zoom to selection

 

After this:

 

selection.AddFeatures(layer, featureReader, 0);

 

Try adding this:

 

selection.Save(resourceService, mapName);

 

(note that your resourceService and mapName variable names may be
different)

Andy 

 

________________________________

From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Knight,
Gregory
Sent: Thursday, February 01, 2007 2:02 PM
To: MapGuide Users Mail List
Subject: RE: [mapguide-users] set and zoom to selection

Me again...  Im trying to work through some of the PHP examples and
convert them to C#...  I not doing a very good job...  but Im making
some progress...

 

I have a feature source - to which Ive applied a basic filter.  I am
able to read feature geometry and attributes from my featureReader...
now id like to convert that filtered feature to a selection... I think
there is a problem with the last four lines in the code below...
because, if I write the selectionXml variable to the task pane, it is
empty.

 

Any idea what Im doing wrong here?

 

            // create a filter to select the specified parcel

             

            String filter = "PID_LONG LIKE '%" + parcelID + "%'";

            MgResourceIdentifier featureResId = new
MgResourceIdentifier("Library://BRA/Data/Bos_Parcels_06.FeatureSource");

            MgFeatureQueryOptions queryOptions = new
MgFeatureQueryOptions();

            queryOptions.SetFilter(filter);

            

            // get the parcel feature from the feature source

            

            MgAgfReaderWriter geometryReaderWriter = new
MgAgfReaderWriter();

            MgFeatureReader featureReader =
featureService.SelectFeatures(featureResId, "Bos_Parcels_06",
queryOptions);

            featureReader.ReadNext();

 

            // get the parcel geometry

 

            MgByteReader byteReader =
featureReader.GetGeometry("Geometry");

            MgGeometry geometry = geometryReaderWriter.Read(byteReader);

            MgPoint point = geometry.GetCentroid();

            double x = point.GetCoordinate().GetX();

            double y = point.GetCoordinate().GetY();

                                    

            // create a selection, save the selection as XML

 

            MgLayerBase layer =
map.GetLayers().GetItem("Bos_Parcels_06");

            MgSelection selection = new MgSelection(map);

            selection.AddFeatures(layer, featureReader, 0);

            String selectionXml = selection.ToXml();

 

________________________________

From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Knight,
Gregory
Sent: Thursday, February 01, 2007 12:07 PM
To: MapGuide Users Mail List
Subject: [mapguide-users] set and zoom to selection

 

I have an application that allows a user to get parcel info for a given
parcel id.  The application flow is much like many of the available
developer samples:

 

-          Get parcel id from user

-          Return link to parcel 

-          User clicks on link to zoom to parcel

-          User can then select parcel to display parcel attributes

 

This works, but I think there is much more user interaction here than
necessary.  Once I have the parcel id from the user (and I know its
valid), Id like to automatically zoom to that parcel and display the
relevant parcel data in the task pane.  Im a little stumped on how I
might do this, as the examples that illustrate setting active selection,
zooming to active selection, etc - all rely on using page load events /
javascript, XML selection sets, etc - again, all more user interaction
than I'd like.  

 

I'm assuming I can do this with one page (as opposed to 2 or 3) via the
web api - but I cant find any examples.  Can someone point me in the
right direction here?

 

Many thanks,

 

Greg

________________________________

 


The substance of this message, including any attachments, may be
confidential, legally
privileged and/or exempt from disclosure pursuant to Massachusetts
law. It is intended
solely for the addressee. If you received this in error, please
contact the sender and
delete the material from any computer.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/mapguide-users/attachments/20070205/cbed9e76/attachment-0001.html