topic MapSelectionChangedEvent.Subscribe VB.Net in ArcGIS Pro SDK Questions

MapSelectionChangedEvent.Subscribe VB.Net

EricPfirman — Mon, 06 Nov 2023 20:39:59 GMT

I am using ArcGIS Pro SDK 3.

I have seen multiple examples in C# like this: ...

MapSelectionChangedEvent.Subscribe(OnSelectionChanged);

private void OnSelectionChanged(MapSelectionChangedEventArgs args)

...

When I try to implement in VB.Net like this: ...

Dim subscriptionToken = Events.MapSelectionChangedEvent.Subscribe(OnSelectionChanged)

Private Async Sub OnSelectionChanged(ByVal args As Events.MapSelectionChangedEventArgs)

... I get an error that says:

Argument not specified for parameter 'args' of 'Private Sub OnMapSelectionChanged(args As MapSelectionChangedEventArgs)'

Re: MapSelectionChangedEvent.Subscribe VB.Net

GKmieliauskas — Tue, 07 Nov 2023 09:41:20 GMT

Hi,

Subscribe parameter must be Action, not Sub. So, your code should look like that:

Dim eventAction As Action(Of Events.MapSelectionChangedEventArgs) = Sub(arg) Dim selection = arg.Selection Console.WriteLine("seelection count is {0}", selection.Count) End Sub Dim subscriptionToken = Events.MapSelectionChangedEvent.Subscribe(eventAction)

Re: MapSelectionChangedEvent.Subscribe VB.Net

EricPfirman — Tue, 07 Nov 2023 15:39:10 GMT

Thank you.