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Add *.lyr file to ArcMap by extern application

Question asked by Manfred170155 on Mar 30, 2017

Developing an application in VB.NET some technical difficulties occurred.


Aim of the application is to add an existing *.lyr file to ArcMap using a VB.NET application and a DLL integrated in ArcMap.


Using the VB.NET application to initiate the DLL integrated in ArcMap an error occurred and ArcMap will shut down.


The source code used is listened below:


Public Sub AddLayerToActiveView(ByVal activeView As ESRI.ArcGIS.Carto.IActiveView, ByVal layerPathFile As System.String)


        If activeView Is Nothing OrElse layerPathFile Is Nothing OrElse (Not layerPathFile.EndsWith(".lyr")) Then


        End If

        ' Create a new GxLayer

        Dim gxLayer As ESRI.ArcGIS.Catalog.IGxLayer = New ESRI.ArcGIS.Catalog.GxLayerClass

        Dim gxFile As ESRI.ArcGIS.Catalog.IGxFile = CType(gxLayer, ESRI.ArcGIS.Catalog.IGxFile) 'Explicit Cast

        ' Set the path for where the layerfile is located on disk

        gxFile.Path = layerPathFile

        ' Test if we have a valid layer and add it to the map

        If Not (gxLayer.Layer Is Nothing) Then

            Dim map As ESRI.ArcGIS.Carto.IMap = activeView.FocusMap

            gxLayer.Layer.Name = layerPathFile


                    End If

    End Sub




''' Aufruf AddLayerToActiveView mit Parametern

  Dim myactiveView As IActiveView = GetActiveViewFromArcMap(My.ArcMap.Application)

Call AddLayerToActiveView(myactiveView, "M:\test\XY200.lyr")



''' Funktion zur Rückgabe von ActiveView

Public Function GetActiveViewFromArcMap(ByVal application As ESRI.ArcGIS.Framework.IApplication) As ESRI.ArcGIS.Carto.IActiveView

        If application Is Nothing Then

            Return Nothing

        End If

        Dim mxDocument As ESRI.ArcGIS.ArcMapUI.IMxDocument = TryCast(application.Document, ESRI.ArcGIS.ArcMapUI.IMxDocument) ' Dynamic Cast

        Dim activeView As ESRI.ArcGIS.Carto.IActiveView = mxDocument.ActiveView

        Return activeView

    End Function


Is it possible to initiate a DLL integrated in ArcMap by a standalone-application?


Any help would be appreciated.


Thank you