[mapguide-users] MapGuide Programming using C#, need help, please

staniz ustazin at yahoo.com
Tue Feb 10 10:01:26 EST 2009

Dennis, I am really sorry for making you confused because I mistyped the
These are the original code that I copied from aspx that i got the first

//Highlight the query result on the map
    MgSelection selection = new MgSelection(map);
    MgLayer layer = map.GetLayers().GetItem("Parcels");
    featureReader = featureService.SelectFeatures(parcelId, "Parcels",
    selection.AddFeatures(layer, featureReader, 0);
    String selectionXML = selection.ToXml();

I changed the line to  ---MgLayerBase layer =
as your suggestion but the Query result is still empty.

I am sorry.

staniz wrote:
> I am using MGE Server and Studio 2008, windows XP and IIS 5.1. I
> downloaded sample code from
> http://download.autodesk.com/media/adn/DevTV_%20Introduction_to_MGE_Programming/SampleCode.zip
> these code is recommended for MGE2007, but I think its also work for
> MGE2008.
> I followed all the instruction in video, and ran the default.aspx. Its
> worked by but When I was trying to run the Query.aspx and execute the
> DisplayQueryResult.aspx I got the following error:
> ----
> Compiler Error Message : CS0266:
> cannot implicitly convert type
> `OSGeo.Mapguide.MgLayerBase` to
> `OSGeo.Mapguide.MgLayer`. An explicit 
> conversion exist (are you missing a cast?)
> Source code:
> Line 58:  MgLayer layer =map.Getlayer().GetItem("Parcels");
> .Net framwork Version:2.0.50727.42
> ----
> please help to solve this problem...
> thanks is advance.
> staniz

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