[fdo-users] Spatial Filter Help Needed

[surrounded]

I think you are correct is using "Geometry" vs using "Shape".    When using
"Geometry" I no longer get the exception thrown, however I do not get any
features returned either.  I will submit a new post on how to create a
spatial filter.

Thanks for the help.....



Jackie Ng wrote:
> 
> Both techniques you described should work.
> 
> - Jackie
> 
> 
> surrounded wrote:
>> 
>> 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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