[mapguide-users] GetMapImage

[wordsy]

I am hoping someone here has had the same problem.

My scenario:

I have a grid of items that are on a map (layers etc).  This page does not
have the main map.  I have a requirement where a user can click on the item
in the grid (asp.net datagrid) and they will be able to see a preview of the
item they have clicked on.  I am using the GetMapImage in a user control.  I
have successfully created the control so it goes to the item picked in the
list and renders that image.  The only problem I have is actually selecting
the item in the map by.

Here is the code I am using:

 string searchstring = "SpatialKey = '" + this.RadTextBox1.Text + "'";

            MgFeatureQueryOptions DisplayIdQuery = new
MgFeatureQueryOptions();            

            DisplayIdQuery.SetFilter(searchstring);

            MgUserInformation userInfo = new
MgUserInformation(Session[SessionStateBase.SESSION_GIS_SESSION_ID].ToString());
            MgSiteConnection siteConnection = new MgSiteConnection();
            siteConnection.Open(userInfo);

            // get the map
            MgMap map = new MgMap(siteConnection);
           
map.Open(Session[SessionStateBase.SESSION_MUNICIPALITY].ToString());

            MgAgfReaderWriter geometryReaderWriter = new
MgAgfReaderWriter();

            MgLayer layer = map.GetLayers().GetItem(LayerName) as MgLayer;
            MgFeatureReader featureReader =
layer.SelectFeatures(DisplayIdQuery);

            featureReader.ReadNext();

            MgByteReader byteReader = featureReader.GetGeometry("Geometry");            
            MgGeometry geometry = geometryReaderWriter.Read(byteReader);
            MgPoint point = geometry.GetCentroid();

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

            MgSelection selection = new MgSelection(map);

           /////THIS IS WHERE I AM HAVING THE PROBLEM/////
            selection.AddFeatures(layer, featureReader, 0);
            //selection.Add(layer.GetObjectId(), map.GetClassName(),
this.RadTextBox1.Text);
            
            String selectionXml = selection.ToXml();
            selectionXml = Regex.Replace(Server.UrlEncode(selectionXml),
"%.{2}", new MatchEvaluator(CapitalizeEncoding));
         
            this.Image1.ImageUrl =
"http://vmedmgis/mapguide/mapagent/mapagent.fcgi?OPERATION=GETMAPIMAGE&VERSION=1.0.0&SESSION="
+ Session[SessionStateBase.SESSION_GIS_SESSION_ID] + "&MAPNAME=" +
Session[SessionStateBase.SESSION_MUNICIPALITY] +
"&LOCALE=en&MAPDEFINITION=Library%3A%2F%2F&FORMAT=PNG&SELECTION=" +
selectionXml + "&SETVIEWCENTERX=" + x.ToString() + "&SETVIEWCENTERY=" +
y.ToString() + "&SETVIEWSCALE=" + ViewScale.ToString() +
"&SETDISPLAYDPI=75&SETDISPLAYWIDTH=375&SETDISPLAYHEIGHT=250&SHOWLAYERS=&HIDELAYERS=&SHOWGROUPS=&HIDEGROUPS=&CLIP=0";

When I select the item on the map and get the selectionXml javascript
function I get

<?xml version="1.0" encoding="UTF-8"?>
<FeatureSet>
<Layer id="6b85dffc-0000-1000-8000-005056c00008">
<Class id="Classname">
<ID>3QEAAA==</ID>
</Class>
</Layer>
</FeatureSet>

but when I run String selectionXml = selection.ToXml();

my code doesn't resemble the javascript xml.  Below is what I get.

<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<FeatureSet xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
xsi:noNamespaceSchemaLocation=\"FeatureSet-1.0.0.xsd\">
</FeatureSet>

As you can see, there is a major difference between the 2 selection xml.

When I pass the selection xml generated by the server side code to the
GetMapImage function the formats aren't the same.

Any ideas why?  Thanks for any help in advance.


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