LogLevel values not matching

Question

Hello,

Can you please advise why the values for LogLevel in Microsoft.Extensions.Logging,
do NOT match those in Microsoft.ApplicationInsights.DataContracts?

here is the code:

So in my C# code, when I have the statement:

//in the loglevel this is = 3  
logger.LogWarning("User does not have access");  

I was expecting this to show up in Application Insights as 3, but instead it shows as 2.

This can sometimes lead to issues in interpreting logs and usage data.

would appreciate your advice,
thanks

Answer 1

Hi @simplify3000 ,

why the values for LogLevel in Microsoft.Extensions.Logging, do NOT match those in Microsoft.ApplicationInsights.DataContracts

They are two different packages, to the Microsoft.ApplicationInsights.DataContracts.SeverityLevel, it is used by ExceptionTelemetry and TraceTelemetry to identify severity level. And the LogLevel Enum defines logging severity levels.

From your code and description, I assume you want to enable Application Insights for an ASP.NET Core application and collect logs, right?

If that is the case, you should use the following package in the Asp.net Core application:

• Microsoft.ApplicationInsights.AspNetCore (ASP.NET Core 3.1 requires Application Insights 2.8.0 or later.)
• Microsoft.Extensions.Logging.ApplicationInsights
• Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel

Then, it will use the Microsoft.Extensions.Logging.LogLevel to set the log level.

More detail information about using Application Insights with Asp.net Core application, see:

Application Insights for ASP.NET Core applications

Application Insights logging with .NET

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Best Regards,
Dillion