[mapguide-users] How to use count or max expression in fdo provider for sdf

[Bruno Scott]

The GetExpressionCapabilities for sdf provider tells me that it supports

	Concat
	SpatialExtents
	Ceil
	Floor
	Lower
	Upper
	Sum
	Count
	Min
	Avg
	Max

But i can't make it to works

    MgFeatureService featureService =
(MgFeatureService)site.CreateService(MgServiceType.FeatureService);
    MgResourceIdentifier resId = new
MgResourceIdentifier("Library://Samples/Sheboygan/Data/Parcels.FeatureSource");
    MgFeatureQueryOptions queryOptions = new MgFeatureQueryOptions();

    //this one returns : Invalid property name: Count()
    //queryOptions.AddFeatureProperty("Count()");
 
    //this one returns : The function 'Count' is not supported by this
provider
    queryOptions.AddComputedProperty("Count", "Count()");

    MgFeatureReader dataReader = featureService.SelectFeatures(resId,
"SHP_Schema:Parcels", queryOptions);
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