[mapguide-users] MgFdo Exception

[padmini godavarthi]

  Hi,
iam using mapguide opensource 2.0 (with .net 2.0 +IIS 5.1)
Now i want to apply the thematic color for the layer
for that i have written a code but it gives me some error in the following line


          Dim dataReader1 As MgDataReader = featureService.SelectAggregate(resId, layer.GetFeatureClassName(), aggregateOptions1)

"An exception of type 'OSGeo.MapGuide.MgFdoException' occurred in MapGuideDotNetApi.DLL but was not handled in user code"

My code was as follows:
-----------------------------------------------------------------------------------------------------

    Dim value As String = ""
        Dim filterText As String = ""
        Dim areaRuleXML As String = ""
        Dim areaDoc As XmlDocument = Nothing
        Dim areaNode As XmlNode = Nothing
        Dim portion As Double = 0.0
        Dim parcelstring As String
            Dim areaRuleTemplate As String = File.ReadAllText(GetThemeXmlTemplatePath())
        Dim aggregateOptions1 As MgFeatureAggregateOptions = New MgFeatureAggregateOptions()
        aggregateOptions1.AddFeatureProperty("PARCEL_ID")
           Dim query2 As String = "PARCEL_ID='708_584'"
        aggregateOptions1.SetFilter(query2)
            Dim increment1 As Double = IIf((5 > 1), 1.0 / (5 - 1), 1.0)
        Dim str As String = layer.GetFeatureClassName()
        Dim dataReader1 As MgDataReader = featureService.SelectAggregate(resId, layer.GetFeatureClassName(), aggregateOptions1)

        While dataReader1.ReadNext()

            value = GetFeaturePropertyValue(dataReader1, "PARCEL_ID")
            ' value = "'785_1000'"

            filterText = """ + "PARCEL_ID" + "" = "

            filterText = filterText + value

            areaRuleXML = String.Format(areaRuleTemplate, "PARCEL_ID" + ":" + value, filterText, InterpolateColor(portion, startcolor, startcolor, 0), InterpolateColor(portion, startcolor, startcolor, 0))
            areaDoc = New XmlDocument()
            areaDoc.LoadXml(areaRuleXML)
                    areaNode = doc.ImportNode(areaDoc.DocumentElement, True)
            areaTypeStyle.AppendChild(areaNode)


            portion = portion + increment1
        End While

        dataReader1.Close()


can anyone plz tell me the solution


Thanks and Regards,
Padmini G.


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