[fdo-users] Spatial Filter Help Needed

[surrounded]

Hi Jackie,

Can you give an idea of how to apply the filter to the select command.  I
thought the sel.SetFilter did that.  Perhaps, I'll try  sel.Filter =
Filter.Parse(pPtLineFilter.toString());

I will also try Geometry.

Thanks.....


Jackie Ng wrote:
> 
> I see two things:
> 
> 1) The filter is being created but not being applied to the select
> command.
> 2) I don't think you can apply filters on "aliased" properties. You should
> be able to filter on the "Geometry" property and get the same result.
> 
> - Jackie
> 
> 
> surrounded wrote:
>> 
>> I'm trying to intersect a circle (created from input coordinates) with a
>> shapefile.  I've created the circle geometry and am now trying to set up
>> the filter.  In the code below, the statement
>> 
>> while(reader.ReadNext()) 
>> 
>> throws the follwing exception:
>> "The property 'Shape' is not in the readers selected property set"
>> 
>> SUGGESTIONS....THANKS
>> 
>> **********************************************
>> 
>> OSGeo.FDO.Expression.GeometryValue pGVal = new
>> GeometryValue(pByteCircle);
>> OSGeo.FDO.Expression.ComputedIdentifier pPropName = new
>> ComputedIdentifier("Shape", new Identifier("Geometry"));
>> 
>> IdentifierCollection pIDColl = sel.PropertyNames;
>> pIDColl.Add(pPropName);
>> 
>> OSGeo.FDO.Filter.Filter pPtLineFilter = new
>> OSGeo.FDO.Filter.SpatialCondition(pPropName,
>> OSGeo.FDO.Filter.SpatialOperations.SpatialOperations_Intersect, pGVal); }
>> 
>> OSGeo.FDO.Commands.Feature.IFeatureReader reader = sel.Execute();
>> while (reader.ReadNext())
>> {
>>      ......some code....
>> } 
>> 
>> 
> 
> 

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