Pick new points of a feature

rajujee — Tue, 01 Jun 2021 17:27:23 GMT

Good day All,

I am unable to figure out how to find all features using ArcObjects 10.6. My code is working on selected feature (1 point) only. It doesn't work on multiple points added.

My code is in vb.net. Any help is appreciated.

Dim pMxDoc As IMxDocument
pMxDoc = CType(My.ArcMap.Application.Document, IMxDocument)
Dim pMap As IMap
pMap = pMxDoc.FocusMap
Dim pEnumFeat As IEnumFeature = TryCast(pMap.FeatureSelection, IEnumFeature)
pEnumFeat.Reset()
Dim pFeat As IFeature = pEnumFeat.Next

If pFeat Is Nothing Then
MessageBox.Show("No Feature Selected.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information)
System.Runtime.InteropServices.Marshal.ReleaseComObject(pEnumFeat)
Return
End If

Dim pFields As IFields
Dim enumFeatSetup As IEnumFeatureSetup = CType(pEnumFeat, IEnumFeatureSetup)
enumFeatSetup.AllFields = True

While pFeat IsNot Nothing
' How to loop through all new poins added?
pFields = pFeat.Fields

sIndex = pFeat.Value(pFeat.Fields.FindField("INDEX"))

sUni = GetUniqueValue(sIndex)

pFeat.Value(pFeat.Fields.FindField("UNIQUE")) =sUni
pFeat.Store()

pFeat = pEnumFeat.Next
End While

Re: Pick new points of a feature

DuncanHornby — Fri, 04 Jun 2021 15:38:12 GMT

Firstly when posting code please insert it and set the language using the </> tool on the toolbar, to see it you need to click on the 3 dots icon. It makes it easier for people to read your code and help you.

Below is a VBA script knocked together and it functioned as expected (note the syntax colouring...)

Public Sub test() Dim pMxDoc As IMxDocument Set pMxDoc = ThisDocument Dim pMap As IMap Set pMap = pMxDoc.FocusMap Dim pEnumFeat As IEnumFeature Set pEnumFeat = pMap.FeatureSelection pEnumFeat.Reset Dim enumFeatSetup As IEnumFeatureSetup Set enumFeatSetup = pEnumFeat enumFeatSetup.AllFields = True Dim pFeat As IFeature Set pFeat = pEnumFeat.Next Dim i As Integer i = pFeat.Fields.FindField("PROV_NAME") Do While Not pFeat Is Nothing Debug.Print pFeat.Value(i) Set pFeat = pEnumFeat.Next Loop End Sub

So this worked for me which made me wonder if you understand what pMap.FeatureSelection is doing. It's returning an enumerator over ALL selections in ALL layers in the map. Your code logic is assuming that ALL layers with a selection have an INDEX and UNIQUE field. Is this your intention?

If you intend to update a single layer then its much safer to get the selection set from IFeatureSelection which has been cast to point to a single FeatureLayer.

topic Re: Pick new points of a feature in ArcObjects SDK Questions

Pick new points of a feature

Re: Pick new points of a feature