could you help me find a better or rapid search method to get all local coord

huangyhg

could you help me find a better or rapid search method to get all local coordinate systems?

Dear Robin,

My goal is to find all local coordinate systems from 5000 features. But it takes about 5 seconds when I try to iterate these features via the following code. I think that it is too slow for an iterative operation of features.

Could you help me find a better or rapid search method to get all local coordinate systems?

Thanks in advance.

My code as follows:

            LPDISPATCH dFeature = NULL;

            LPDISPATCH dNextFeature = NULL;

            // import the supported features

            while (dFeature != NULL)

            {

                  IFEATURE swFeature(dFeature);

                  CString featureTypeName = swFeature.GetTypeName();

                  // is this a coordinate system feature

                  if (featureTypeName.Compare(swTnCoordinateSystem) == 0)

                  {

                       CString CSysName = swFeature.GetName();

// do simple things

                  }

                  // get next feature

                  dNextFeature = swFeature.GetNextFeature();

                  // release current feature

                  swFeature.DetachDispatch();

                  if (dFeature)

                  {

                       dFeature->Release();

                       dFeature = NULL;

                  }

                  dFeature = dNextFeature;

            }

huangyhg

Hello,

Have a look at FeatureManager.GetFeatures.  While this will not filter on feature types, it will give you all of the features for that document.





Regards,

-Earl