ReactiveUI Events doesn't seem to have an implementation of SelectionChanged for ListView

[Awsmolak]

Attempting to use the events on a listview to get the selected items.

In my viewmodel:

this.MyListView.Events().SelectionChanged
....

Does not work because Events() doesn't seem to have SelectionChanged implemented.

[glennawatson]

If you're in a position to you can try moving to our preferred mechanism now the source generator https://github.com/reactivemarbles/ObservableEvents#observable-event-generator

GitHub

reactivemarbles/ObservableEvents

Contribute to reactivemarbles/ObservableEvents development by creating an account on GitHub.

[Awsmolak]

Not in a position at the moment. Going to go ahead and use Observable.FromEventPattern for the moment, if there truly is no event implementation yet. Like this (I was wondering if I had maybe missed something...)

I'll explore using the generator sometime down the line.

[glennawatson]

When you are in a position it should be a straight swap over, no change in the syntax.

[Awsmolak]

The event I'm trying to subscribe to is System.Controls.Listview. The readme only discusses using the generator on my classes. So how would I get it to generate the event for external assemblies like that?

[glennawatson]

The generator will work for ListView automatically.

[Awsmolak]

Gotcha!
I've added the package using the recommendation in the Readme, but I can't seem to reference ReactiveMarbles.ObservableEvents. My project is .NET 4.8 not .NET Core...

[glennawatson]

What version of Visual Studio are you using?

[Awsmolak]

2019 v16.9.4

[glennawatson]

New enough to handle source generators although v16.10 is better.

Sometimes you might need to give the project a compile first.

[Awsmolak]

I've tried rebuilding, reopening solution, installing from the package manager GUI instead of adding the packagereference to the .csproj. Nothing...

Updated VS to 16.10.2. Still getting:

error CS0246: The type or namespace name 'ReactiveMarbles' could not be found (are you missing a using directive or an assembly reference?)

[Awsmolak]

No luck. Maybe there is something funky going on with Nuget?
One interesting thing I noticed is that if I add:

<PackageReference Include="ReactiveMarbles.ObservableEvents.SourceGenerator" Version="1.0.2" PrivateAssets="all" />

to my .csproj, the package manager GUI no longer sees any of my other packages, just that one.

But regardless of how I reference it in my project, the compiler will not pick it up.

[glennawatson]

If you want you can jump onto Slack I can probably maybe give you a bit more interactive help rather than in a issue.

https://www.reactiveui.net/slack

Slack

[drepamig]

I was having a similar issue as @Awsmolak. After some troubleshooting, I found a solution. See this issue. The key that helped me find the solution was the build failing in *_wpftmp.csproj vs the actual project's csproj.

The fix is simply to add <IncludePackageReferencesDuringMarkupCompilation>true</IncludePackageReferencesDuringMarkupCompilation> to the <PropertyGroup> section in your project's csproj file.

[glennawatson]

Looks like there is a solution bsaed on @drepamig -- Thanks for the help.

[github-actions]

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