[Feature Request] Add possibility to return value in CallBackInteropWrapper

[redradist]

Hi,,

It would be nice to have possibility to return value from CallBackInteropWrapper like ValueTask<TResult>

[RemiBou]

You can already do it with the generic CallBackInteropWrapper if I understand you correctly. Like here https://github.com/RemiBou/BrowserInterop/blob/master/src/BrowserInterop/WindowInterop.cs#L656

[redradist]

You can already do it with the generic CallBackInteropWrapper if I understand you correctly. Like here https://github.com/RemiBou/BrowserInterop/blob/master/src/BrowserInterop/WindowInterop.cs#L656

@RemiBou But how to return the value to Js code from CallBackInteropWrapper ?

I have not found proper solution and I have created two callbacks in BlazorGooglePay that one is used to send data to C# code and second is used to get data from Js storage after ...

[RemiBou]

You use the value as a parameter of your callback.

CallBackInteropWrapper.Create<MyObject>(
                   (MyObject o) => { 
                        Console.WriteLine(o.ToString()); 
                        return taslk.CompletedTask 
                   },
                    getJsObjectRef: false,
                    serializationSpec:"*")

You will use your object where I did the Console.WriteLine.
The value returned by CallBackInteropWrapper is only the disposable for unsubscribing.

[redradist]

You use the value as a parameter of your callback.

CallBackInteropWrapper.Create<MyObject>(
                   (MyObject o) => { 
                        Console.WriteLine(o.ToString()); 
                        return taslk.CompletedTask 
                   },
                    getJsObjectRef: false,
                    serializationSpec:"*")

You will use your object where I did the Console.WriteLine.
The value returned by CallBackInteropWrapper is only the disposable for unsubscribing.

@RemiBou Yes, I understand, but I want something like this:

CallBackInteropWrapper.Create<MyObject>(
                   (MyObject o) => { 
                        Console.WriteLine(o.ToString()); 
                        return "Token value";
                   },
                    getJsObjectRef: false,
                    serializationSpec:"*")

Where Js code will get some value back like "Token value"

[RemiBou]

ok I see ! Good idea, it's indeed a new feature. For now the workaround is to use interop for calling an other method with "Token value".

[redradist]

ok I see ! Good idea, it's indeed a new feature. For now the workaround is to use interop for calling an other method with "Token value".

@RemiBou Yeah, I actually did like this in BlazorGooglePay )
But it is little bit ugly )))

[redradist]

@RemiBou Seems like this feature is relatively easy to implement

https://github.com/RemiBou/BrowserInterop/blob/master/src/BrowserInterop/wwwroot/scripts.js#L52

I guess there should be return keyword before netObjectRef.invokeMethodAsync('Invoke', ...args);

[RemiBou]

Indeed, I'll try to include it next release (with your PR and some other little changes) maybe tonight (CET) if I can

[redradist]

Feature is implemented within above pull-requests