Enumerate Layers in Map Package

MarkOberg — Sun, 12 Dec 2021 03:31:20 GMT

What is the proper way to enumerate layers in MPK package generate from a personal geodatabase without using a MapView control? All the examples use the MapView or hard-code an index of the layer needed. Here is code (VB.NET):

Dim map As Esri.ArcGISRuntime.LocalServices.LocalFeatureService = _
     Await Esri.ArcGISRuntime.LocalServices.LocalFeatureService.StartAsync(mpkPath)
Dim i As Integer = 0
Do While True
  Dim sfTable As Esri.ArcGISRuntime.Data.ServiceFeatureTable = Nothing
  Try
       sfTable = Await Esri.ArcGISRuntime.Data.ServiceFeatureTable.OpenAsync(New Uri(map.UrlMapService & "/" & i))
  Catch ex As Exception
       sfTable = Nothing
  End Try
  If sfTable Is Nothing Then
       Exit Do
  End If
  ' Do something with sfTable
  i += 1
Loop

Is this the proper way of enumerating until you get a 404 error when you're passed the last index ?

Thanks in advance,

Mark Oberg

Re: Enumerate Layers in Map Package

ThadTilton — Tue, 03 Feb 2015 00:12:27 GMT

Hi Mark -

Once you have a layer from the local service, you can use the ServiceInfo property of the layer to get details about the service.

The following example creates a dynamic map service layer using the URL of the local service. It then reads the service info and loops thru all layers in the service to find layer ID and name.

Dim localService As LocalFeatureService = Await LocalFeatureService.StartAsync(mpkPath)

Dim dynLayer As ArcGISDynamicMapServiceLayer = New ArcGISDynamicMapServiceLayer(New Uri(localService.UrlMapService))

Await dynLayer.InitializeAsync()

Dim serviceInfo As MapServiceInfo = dynLayer.ServiceInfo

Dim layerInfo As IReadOnlyCollection(Of LayerServiceInfo) = serviceInfo.Layers

For Each info As LayerServiceInfo In layerInfo

Dim id As Integer = info.ID

Dim name As String = info.Name

You could do the same thing with ServiceFeatureTable (sfTable variable in your example) - initialize a service feature table with the first table in the package, then read the service info to determine what else is available.

Hope that helps, Thad

topic Re: Enumerate Layers in Map Package in .NET Maps SDK Questions

Enumerate Layers in Map Package

Re: Enumerate Layers in Map Package