SetInstrumentationKey doesn't appear to be working (Gives 'Please provide instrumentation key')

I checked out your Sample project and just replaced the cfg in index.html with an empty object. Like so: cfg: {}

Then I went into Program.cs, removed the telemetry, and added SetInstrumentationKey

builder.Services.AddBlazorApplicationInsights(async applicationInsights =>
{
    await applicationInsights.SetInstrumentationKey("MyKeyHere");
    await applicationInsights.LoadAppInsights();
});

but I keep getting this warning in the browser Failed to initialize AppInsights JS SDK for instance appInsights - Please provide instrumentation key

If I replace it directly in the index.html it works fine, but I’m trying to get the key from the appsettings since that’s what gets replaced in my deployment scripts.

I tried with both the original .NET Core version the library was written in, and also the one I’m using (5.0.4), but the problem appears in both.

[IvanJosipovic]

I have updated the readme with a new approach on how to set the instrumentation key. See, https://github.com/IvanJosipovic/BlazorApplicationInsights#set-instrumentation-key-programmatically

[IvanJosipovic]

I have documented a new approach for Blazor WASM ASP.NET Hosted Projects in the Readme. This solution will need to be manually implemented for self hosted Blazor, it essentially uses a cookie to store the ConnectionString.

I do not recommend using SetInstrumentationKey and SetConnectionString (due to https://github.com/IvanJosipovic/BlazorApplicationInsights/issues/90) and they will likely be marked as obsolete in a future version.