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To complete the Audit Log entries, we need the table name (if one was specified via the [Table()] attribute, otherwise we will use the entity class name), the primary key value, and either the contents of the entire entity (for inserts and deletes), or the before-and-after values of the changed columns.For the contents of the entire entity, if the entity implements the IDescribable Entity interface, we will call the Describe() method to get the content data, otherwise we will just use the To String() method.You can use Model-First or Database-First and obtain the same results, but you will need to add the Db Context API code-generation item to your model and modify the templates to add at least the [Key] attribute to key columns.The Fluent API is a bit trickier: I’m not currently aware of a way to pull those attributes out of the entity, so you would need to find some other way to determine which column to output as the key value to duplicate this example.If we run this and examine the Audit Log table, we will find the following (click to enlarge): Note that the cascade delete captures the delete from both tables, and has records of all of the changes made between calls to Save Changes().Now that this is in place, any change made in the application that uses that Db Context class will automatically write audit information to the Audit Log table.Joseph Banks Rhine (September 29, 1895 – February 20, 1980), usually known as J. Rhine, was an American botanist who founded parapsychology as a branch of psychology, founding the parapsychology lab at Duke University, the Journal of Parapsychology, the Foundation for Research on the Nature of Man, and the Parapsychological Association.

Traditionally, this would be done either through log events, stored procedures that implement the logging, or the use of archive/tombstone tables to store the old values before the modification (hopefully enforced through stored procedures).

Rhine began the studies that helped develop parapsychology into a branch of science; he looked at parapsychology as a branch of "abnormal psychology." Rhine lent an insight into the medium Mina Crandon's performances.



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