serialize objects or collections to log

Question

I want save some addtitional info with my error message. For example it should be user query, or something else. How should I do it?

Is there any build it methods for logging collections, structurest or objects? Or I should serialize it myself?

Answer 1

NLog ver. 4.5 includes new features for structured logging:

var order = new Order
{
    OrderId = 2,
    Status = OrderStatus.Processing
};

logger.Info("Test {value1}", order);
// object Result:  Test MyProgram.Program+Order
logger.Info("Test {@value1}", order);
// object Result:  Test {"OrderId":2, "Status":"Processing"}
logger.Info("Test {value1}", new { OrderId = 2, Status = "Processing"});
// anomynous object. Result: Test { OrderId = 2, Status = Processing }
logger.Info("Test {@value1}", new { OrderId = 2, Status = "Processing"});
// anomynous object. Result:Test {"OrderId":2, "Status":"Processing"}

https://github.com/NLog/NLog/wiki/How-to-use-structured-logging

Answer 2

there is a very simple solution to implement structure logging with nlog.

try
            {
                // bla bla bla 
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "MyRequest{@0}", request);

            }

the symbol @ serialize the request object

https://github.com/NLog/NLog/wiki/How-to-use-structured-logging