Get Selected Feature Example

This example shows how to get the selected feature and its type, and return the object to the calling method.

 

LPFEATURE CGetSelectedFeatureApp::GetSelectedFeature1( LPMODELDOC2 pModelDoc, CString* Message )

{

 long lres = 0;

 LPSELECTIONMGR pSelectMgr = NULL;     

 HRESULT hres =NULL;

 LPUNKNOWN pUnk = NULL;

 LPFEATURE pSelectedFeature = NULL;

 BSTR bFeatureTypeName;

 BSTR bFeatureName;

 

 // Get the Selection Manager for this doc

 if(S_OK != pModelDoc->get_ISelectionManager( &pSelectMgr ) ||

pSelectMgr == NULL)

 {

  *Message = "Unable to get the Selection Manager.\r\n";

 }

 else if(S_OK != pSelectMgr->GetSelectedObjectType( 1, &lres )

|| lres == 0)

 {

 // Get the Selected Object type

  *Message = "No Feature is currently selected.\r\n";

 }

 else if(S_OK != pSelectMgr->IGetSelectedObject2( 1, &pUnk )

|| pUnk == NULL)

 {

 // Get the Selected Object of Unknown Type

  *Message = "Unable to get the selected Object.\r\n";

 }

 else if(S_OK != pUnk->QueryInterface( IID_IFeature,

(LPVOID *)&pSelectedFeature) || pSelectedFeature == NULL)

 {

 // Get the Selected Feature

  *Message = "Unable to get the selected Feature.\r\n";

 }

 else if(S_OK != pSelectedFeature->GetTypeName(&bFeatureTypeName)||

bFeatureTypeName == NULL)

 {

 // Get the Selected Feature Type Name

 

  *Message = "Unable to get the selected Feature Type Name.\r\n";

 }

 else if(S_OK != pSelectedFeature->get_Name(&bFeatureName)||

bFeatureName == NULL)

 {

 // Get the Selected Feature Name

  *Message = "Unable to get the selected Feature Name.\r\n";

 }

 else

 {

  // Everything is okay. Clean up and report back with object.

 

  // Release the Selection Manager

  pSelectMgr->Release();

  // Release the unknown object

  pUnk->Release();

 

  // Form the return message

  CString FeatureTypeName(bFeatureTypeName);

  CString FeatureName(bFeatureName);

  *Message = "Found a Feature called " + FeatureName + " of type "

+ FeatureTypeName + ".\r\n";

 

  SysFreeString(bFeatureTypeName);

  SysFreeString(bFeatureName);

  // Return with Feature object

  return pSelectedFeature;     

 }

 // Something went wrong. Clean up and report back without object.

 // Release the Selection Manager

 if(pSelectMgr)pSelectMgr->Release();

 // Release the unknown object

 if(pUnk)pUnk->Release();

 // Return with no object

 return NULL;

}