topic Re: vb.net arcobjects spatial search sample in ArcObjects SDK Questions

vb.net arcobjects spatial search sample

LiYao — Wed, 06 Aug 2014 03:30:11 GMT

Hi,

I want to perform a spatial search on ArcMap 10.2, cannot find proper sample for vb.net, what I found is the code from VBA. When I trying to convert it to vb.net, I encounter reference problem, the code is as following:

Public Function SpatialQuery(pFeatureClassIN As esriGeoDatabase.IFeatureClass, _

searchGeometry As esriGeometry.IGeometry, _

spatialRelation As esriGeoDatabase.esriSpatialRelEnum, _

Optional whereClause As String = "" _

) As esriGeoDatabase.IFeatureCursor

Dim pSpatialFilter As esriGeoDatabase.ISpatialFilter

Dim strShpFld As String

Dim pFeatCursor As esriGeoDatabase.IFeatureCursor

Dim pQueryFilter As esriGeoDatabase.IQueryFilter

' create a spatial query filter

pSpatialFilter = New esriGeoDatabase.SpatialFilter

' specify the geometry to query with

pSpatialFilter.Geometry = searchGeometry

' specify what the geometry file is called on the Feature Class that we will be querying against

strShpFld = pFeatureClassIN.ShapeFieldName

pSpatialFilter.GeometryField = strShpFld

' specify the type of spatial operation to use

pSpatialFilter.SpatialRel = spatialRelation

' create the where statement

pSpatialFilter.whereClause = whereClause

' perform the query and use a cursor to hold the results

pQueryFilter = pSpatialFilter

pFeatCursor = pFeatureClassIN.Search(pQueryFilter, False)

SpatialQuery = pFeatCursor

End Function

Then I got the following errors:

Not sure is it because the library difference of ArcGIS version? or what kind of library missing in my vb file? what shoukd I do to make it work?

Thanks for your time.

Re: vb.net arcobjects spatial search sample

OwenEarley — Wed, 06 Aug 2014 04:40:17 GMT

You will need to reference the appropriate DLL files and then import the namespaces in your code file.

For example in Visual Studio - Add Reference:

Then in your code file import the required namespaces:

Imports ESRI.ArcGIS.Geometry

Imports ESRI.ArcGIS.Geodatabase

Public Class ExampleClass

Public Function SpatialQuery(pFeatureClassIN As IFeatureClass, _

searchGeometry As IGeometry, _

spatialRelation As esriSpatialRelEnum, _

Optional whereClause As String = "" _

) As IFeatureCursor

Dim pSpatialFilter As ISpatialFilter

Dim strShpFld As String

Dim pFeatCursor As IFeatureCursor

Dim pQueryFilter As IQueryFilter

' etc ...

End Function

End Class

Check out the ArcObjects namespaces page to find the appropriate DLLs to reference as well as the namespaces to import.

Hope this helps,

Owen

Spatial XP

Re: vb.net arcobjects spatial search sample

LiYao — Wed, 06 Aug 2014 05:32:45 GMT

Hi Owen,

Thanks for your quick reply. But I have already imported the necessary reference in the namespaces.

Re: vb.net arcobjects spatial search sample

OwenEarley — Wed, 06 Aug 2014 07:25:15 GMT

Hi Li Yao,

If you have added the ESRI references already then the types in your code would change from

pFeatureClassIN As esriGeoDatabase.IFeatureClass

To this:

Imports ESRI.ArcGIS.Geodatabase

...

pFeatureClassIN As IFeatureClass

or (without the Imports statement):

pFeatureClassIN As ESRI.ArcGIS.Geodatabase.IFeatureClass

Regards,

Owen

Re: vb.net arcobjects spatial search sample

LiYao — Wed, 06 Aug 2014 07:43:19 GMT

Hi Owen,

Yes you are right. Thank you very much for the patient to a beginner.