javascript - Passing Arrays to blazors IJSRuntime.InvokeAsync - Stack Overflow

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I wonder what is the best way to pass an array to IJSRuntime.InvokeAsync.
The problem I stumbled upon is that blazor will pass each element of the array as a parameter to the javascript function since InvokeAsync has an open parameter list and will not know if you just passed arguments of the same type or an array.

For now I just go with a second parameter like InvokeAsync("functionname", array, false).

Any other suggestions? Better solutions?

I wonder what is the best way to pass an array to IJSRuntime.InvokeAsync.
The problem I stumbled upon is that blazor will pass each element of the array as a parameter to the javascript function since InvokeAsync has an open parameter list and will not know if you just passed arguments of the same type or an array.

For now I just go with a second parameter like InvokeAsync("functionname", array, false).

Any other suggestions? Better solutions?

• javascript
• blazor
• blazor-webassembly

Share Improve this question Follow edited Aug 4, 2021 at 16:15 Tomerikoo 19.5k1616 gold badges5555 silver badges6767 bronze badges asked Aug 4, 2021 at 16:09 fvetschfvetsch 19111 silver badge1212 bronze badges

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1 Answer 1

Sorted by: Reset to default 12

You'd either have to cast your array to object* or call the Extension method directly:

var array = Array.Empty<Baz>();
// Casting to object
JS.InvokeAsync<Foo>("bar", (object)array);

// Explicitly call the extension method:
JSRuntimeExtensions.InvokeAsync<Foo>(JS, "bar", array);

Or just use the overload it thinks you are attempting to call:

JS.InvokeAsync<Foo>("bar", new object[] { array });

_{* Based on my limited knowledge of C#'s Overload Resolution.}

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