@bind- completion broken

[Dreamescaper]

Visual Studio version: 17.13.5 / 17.14 P2

VS does not suggest @bind- completions anymore.
Let's say my component has Text and TextChanged properties. Previosly it would suggest @bind-Text completion. It doesn't work anymore. It works fine if I type @bind-Text=... manually.

[davidwengier]

@Dreamescaper Is this a 100% repro for you? I can't repro this problem in VS 17.14 Preview 2.
How are you bringing up completion here? Just typing, or are you using Ctrl+Space/Ctrl+J?

This from the default BlazorBindings.Maui project template:

Any more specifics you can think of would be great. I've tried with every combination I can think of, with and without the /> at the end, etc. Are there any other build errors or anything in the error list? Does it happen for you with non-generic components (Entry is generic, right?)?

[Dreamescaper]

I'm sorry I haven't provided any consise sample - frankly, I thought that it's simply broken for all cases, and would be easy to reproduce.

It's 100% repro for me in my project, for any combinations I can think of. Not specific to generics or BlazorBindings.Maui, it reproduces for me for this simpliest manual component:

    public class ReproComponent : ComponentBase
    {
        [Parameter] public string Name { get; set; }
        [Parameter] public EventCallback<string> NameChanged { get; set; }
    }

BUT - I've created empty project, and it does NOT reproduce there. Same component, and it works fine!
I'll try to understand what causes it in my project.

[davidwengier]

Thanks for the quick response. If you are able to share the project (privately via email is fine, david dot wengier at microsoft dot com), I would be happy to try to repro and debug through locally, but I understand if thats not possible too, just trying to save you some guess work. Let us know how you go.

[Dreamescaper]

I have shared my project via email.
I have figured out that this issue is caused by "Microsoft.AspNetCore.Components.WebView.Maui" package, which is needed for razor compilation in MAUI projects. This issue does not happen if I remove this package.

Still, I wasn't able to reproduce it on a newly created sample project with the same setup.

I have a suspicion that I'm doing something which is not directly supported. I'm very curious why does it affect @bind completions and nothing else though :)

[davidwengier]

Thanks @Dreamescaper. I haven't got anything in my email yet, but will check again in a few hours. Got it!

As a complete guess, I suspect something is causing the compiler to either bind to the wrong EventCallback type, so its not seeing your event property as a "real" one. Whether its the compiler that is wrong, or your project, we'll just have to wait and see :)

[davidwengier]

Now to work out how to get my machine to actually work with this project 🤦‍♂️

Version 35.0.61 of package microsoft.android.sdk.windows.msi.x64 is not found

[Dreamescaper]

@davidwengier
I assume you don't have corresponding android SDK or MAUI android workload installed.
Anyway, I have sent you an updated project, which is compilable with 'net9.0' target. You won't be able to run it, but the completion issue reproduces anyway.

[davidwengier]

Thanks. I actually got it working in the end, just needed a few more nuget feeds. Being a work machine, with various internal bits, it's always a mystery as to what my setup is :)

[davidwengier]

Found the issue, finally! Turns out its not completion at all, the actual underlying bind infrastructure isn't being hooked up because the BindInputElementAttribute is not part of the compilation. So I guess you're missing a reference to Microsoft.AspNetCore.Components.Web. This presumably explains why it doesn't repro for you in a sample project with default references.