Outlook Web Add-in Blazor Example for OnMessageSend Event about office-add-in-samples HOT 6 OPEN

Hi @CorithMalin82,

Unfortunately, I don't think this scenario will work. When Outlook on Windows launches your code to handle an event it uses a plain JavaScript engine. There's no UI or browser runtime, which likely Blazor WebAssembly would expect.

It's possible it might work in Outlook on the browser. In that case Outlook will use the browser to run your event code. Have you tried that scenario?

@aafvstam do you have any ideas here?

Thanks!
David

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Hi @davidchesnut,
We were testing in the browser and on Windows Desktop with Outlook 365. Both would work with a TaskPane but neither would work when trying to use the OnMessageSend feature. I suspect you're right on about the UI or browser runtime, as the issue we've encountered is an inability to get the blazor app to load because it seems it's never being hit.

Do you know if Blazor apps for the OnMessageSend feature are in the works? It would enable my company to drastically speed up the processing of our web add-in as right now we end up having to do the processing remotely using the GraphAPI instead of locally via JavaScript. It would also save us compute resources as we could do our processing on the client's computer instead of in our clouse services.

Thanks for your thoughts and comments.

from office-add-in-samples.

Hi @CorithMalin82, thanks for sharing your scenario. I found this documentation on Blazor webassembly which I think confirms it is dependent on a DOM (from diagram and descriptions). I know the JS Runtime used for Outlook events doesn't have a DOM. I do have a question out to the Blazor team to see if there is any workaround, and will post an update if I find anything. Unfortunately for now, I don't think it's possible.

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