Log

Emits log entries to a configurable set of log targets called sinks

Workflow designers can drop a Log activity onto the canvas to emit structured log entries from a workflow.

The Message input supports message templates, allowing placeholders such as Hello {Name} to be replaced with runtime values provided through the Arguments input.

The activity exposes the following properties:

• Message: The log message template to emit.

• Level: The log level (Trace, Debug, Information, Warning, Error, Critical).

• Category: The log category (defaults to "Process").

• Arguments: Values for named or indexed placeholders in the message template.

• Attributes: Additional key/value pairs to include as attributes.

• SinkNames: Target sinks to write to (appears as a check list of available sinks).

When the application exposes multiple sinks, they appear in the Sinks picker so the workflow author can choose one or more destinations for the log entry.

Example usage in a workflow:

new Log("Workflow started", LogLevel.Information)

You can also specify sinks and attributes:

new Log
{
    Message = new("Order received: {OrderId}"),
    Arguments = new(new { OrderId = orderId }),
    SinkNames = new(new[] { "FileJson" })
}

Custom Log Sinks

The Logging Framework is designed to be extended with custom Log Sink configurations and implementations. To learn more, see Logging Framework.