fix: System.ArgumentNullException in MessageService.ShowMessageBar about fluentui-blazor HOT 5 CLOSED

Ok, the issue is that you have not specified an Intent of the MessageBar in the options.

It will go through this code

 return Content.Intent switch
                {
                    MessageIntent.Info => new CoreIcons.Filled.Size20.Info(),
                    MessageIntent.Warning => new CoreIcons.Filled.Size20.Warning(),
                    MessageIntent.Error => new CoreIcons.Filled.Size20.DismissCircle(),
                    MessageIntent.Success => new CoreIcons.Filled.Size20.CheckmarkCircle(),
                    _ => null,
                };

In your case it returns null and that is what gives you the error.

So 'workaround' is for now to supply an Intent (of type Messageintent) in the options.

I'll implement a default (MessageIntent.Info) for this for the next trelease.

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@verdie-g

Did you add the icons package as per https://www.fluentui-blazor.net/IconsAndEmoji?

dotnet add package FluentUI.AspNetCore.Components.Icons

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Is this happening in a published application? If so, it is probably the trimmer being to aggressive. Try with adding to your project file:
<ItemGroup> <TrimmerRootAssembly Include="Microsoft.FluentUI.AspNetCore.Components" /> </ItemGroup>

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I could reproduce in a minimal application:

1. dotnet new fluentblazorwasm -n FluentBlazorTest
2. replace the Home.razor with the snippet of my first message
3. run the app in debug mode

Did you add the icons package as per https://www.fluentui-blazor.net/IconsAndEmoji?

I confirm that this package is included in the template

Is this happening in a published application?

and that I've not published the app but just ran it from my IDE.

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Ok, with these settings your home page is using SSR. Maybe that is it. Never mind, it's wasm...

Will take a look later

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