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#N1mm logger startup options code

Generally, Trace, Information, Debug levels are meant for additional information that is required for debugging. How ? We will look at this part in the next section. Log Levels are used by logging providers to decide which data should be written in the log storage medium. There are multiple log levels and it can be very confusing sometimes to a new person to decide which log level should be used for a log message. For writing log message with a log level, you can use Log methods from ILogger instance. The log level can be Trace, Debug, Warning, Information, Error, Critical, etc.ĭepending on purpose of information being logged, appropriate log level can be assigned with every logged message. LogLevel enum defines different type of log levels. What is Log Level ?īefore understanding to the configurations, let’s have a quick look at log levels.

#N1mm logger startup options code

This can be helpful to view the logged messages organized by log category.īelow code example shows both ways of getting an ILogger instance. In some applications, ILoggerFactory injection might be helpful as it allows you to specify custom category name. Then ILoggerFactory.CreateLogger can be used to specify the category name.

ILoggerFactory can be injected in any type.

In this case, fully qualified name of type T would be used as log category.

ILogger can be injected in type T and then use it for writing logs.

When a Generic Host is setup, there are two ways to acquire the instances of ILogger instance: When ILogger is injected in the constructor, it uses fully qualified name of type T as the log category.

But generally, the fully qualified class name is used as a log category. This category name can be any random string. This category is included with each log message created by the ILogger instance. When an ILogger object is created, a log category is specified. This article explains a bit about how the logging internally works and how logging levels can be configured in appsettings.json. In last two articles, we have seen how the logging providers can be configured in.