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javascriptblazorblazor-webassembly

Passing Arrays to blazors IJSRuntime.InvokeAsync

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?

Solution

  • 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.