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Var logger = LoggerFactory.Create(config => The following example calls AddConsole in Program.cs and logs the /Test endpoint: var builder = WebApplication.CreateBuilder(args)

The following example calls in Program.cs and logs informational messages: var builder = WebApplication.CreateBuilder(args) Īpp.Logger.LogInformation("Adding Routes") Īpp.Logger.LogInformation("Starting the app") Each provider defines an alias that can be used in configuration in place of the fully qualified type name. For example, the level in overrides the level in LogLevel.Default. _logger.LogInformation("About page visited at placeholder is the provider name. The Log level indicates the severity of the logged event.

Calls LogInformation to log at the Information level.

The log category is a string that is associated with each log.

Creates a logger, ILogger, which uses a log category of the fully qualified name of the type AboutModel.

To create logs, use an ILogger object from dependency injection (DI).

The following code overrides the default set of logging providers added by WebApplication.CreateBuilder: var builder = WebApplication.CreateBuilder(args) Īlternatively, the preceding logging code can be written as follows: var builder = WebApplication.CreateBuilder() The next several sections provide samples based on the ASP.NET Core web app templates, which use the Generic Host. The preceding code shows the Program.cs file created with the ASP.NET Core web app templates. Var builder = WebApplication.CreateBuilder(args)

Call WebApplication.CreateBuilder, which adds the following logging providers:.

The default ASP.NET Core web app templates: For example, the Azure Application Insights provider stores logs in Azure Application Insights. Logging providers store logs, except for the Console provider which displays logs.

For more information on logging in Blazor apps, see ASP.NET Core Blazor logging. By Kirk Larkin, Juergen Gutsch, and Rick Anderson