add featureclass from geodatabase featuredataset

TanaHaluska — Tue, 08 Feb 2011 19:28:58 GMT

Hello
I'm new to vb and dotnet. I'm running arcgis 10. I think I am close but need help finishing my procedure below. The code below works up to the point where I have the message box. The error I get is "Unable to cast COM object of type 'System.__ComObject" to interface type 'ESRI.ArcGIS.Carto.IFeatureLayer'" I've tried several variations on the last few lines but can't figure it out. I'm inexperienced in casting, which I think is what I need to do here. Any help is appreciated. I just want to add the featureclass that is inside the geodatabase featuredataset to the map document.
thanks
tlh

Private Sub LoadInundationLayers()
        Dim pMxDoc As IMxDocument = DirectCast(m_app.document, IMxDocument)
        Dim pMap As IMap = pMxDoc.FocusMap
        Dim pFLayer As ESRI.ArcGIS.Carto.IFeatureLayer
        Dim pWSFactory As ESRI.ArcGIS.Geodatabase.IWorkspaceFactory = New FileGDBWorkspaceFactory
        Dim pFWS As ESRI.ArcGIS.Geodatabase.IFeatureWorkspace
        Dim pFDSet As ESRI.ArcGIS.Geodatabase.IFeatureDataset
        Dim pFCContainer As ESRI.ArcGIS.Geodatabase.IFeatureClassContainer
        Dim pFClass As ESRI.ArcGIS.Geodatabase.IFeatureClass
        Dim intParcNum As Integer = 9
        intInundationStage = 413000
        Dim strGDBName As String = strDefaultWorkspace & "\Processed_Data\ShorelineManagementTool_" & frmScenSet.lblVertDatStage.Text & ".gdb"
        Dim strFDSetName As String = "InundationAreasParcel_" & intParcNum
        Dim strFClassName As String = "p" & intParcNum & intInundationStage & "_polygon"

        Try
            pFWS = pWSFactory.OpenFromFile(strGDBName, 0)
            pFDSet = pFWS.OpenFeatureDataset(strFDSetName)
            pFCContainer = CType(pFDSet, ESRI.ArcGIS.Geodatabase.IFeatureClassContainer)
            pFClass = pFCContainer.ClassByName(strFClassName)
            MsgBox("code works up to here")
            pFLayer = pFClass
            pMap.AddLayer(pFLayer)
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub

Re: add featureclass from geodatabase featuredataset

JeffMatson — Tue, 08 Feb 2011 20:03:11 GMT

It should work by updating the following two lines of code:

Dim pFLayer As ESRI.ArcGIS.Carto.IFeatureLayer = New FeatureLayer

pFLayer.FeatureClass = pFClass

Re: add featureclass from geodatabase featuredataset

TanaHaluska — Tue, 08 Feb 2011 20:43:14 GMT

Hi Jeff
I get an error "Implementing class ESRI.ArcGIS.Carto.FeatureLayerClass for interface ESRI.ArcGIS.Carto.FeatureLayer can not be found.
thanks for your help
tlh

Re: add featureclass from geodatabase featuredataset

JeffMatson — Wed, 09 Feb 2011 13:31:10 GMT

You might check your project references, see the following link:

http://forums.esri.com/Thread.asp?c=93&f=1170&t=261461

hope that helps,

Jeff

Re: add featureclass from geodatabase featuredataset

TanaHaluska — Wed, 09 Feb 2011 13:52:16 GMT

Jeff:
It worked! I just needed to modify the code as you stated and add the display reference.
thank you so much!
tlh

topic Re: add featureclass from geodatabase featuredataset in ArcObjects SDK Questions

add featureclass from geodatabase featuredataset

Re: add featureclass from geodatabase featuredataset

Re: add featureclass from geodatabase featuredataset

Re: add featureclass from geodatabase featuredataset

Re: add featureclass from geodatabase featuredataset