DataSet <-> Data Source
The connection between the DataSet
and the data source is usually provided with a DataAdapter. Once a DataSet has
got the data it is disconnected from the data source, whatever changes you make
to the data are kept in the DataSet until you update the data source.
Original This state is how
the data was when it first came into the dataset. This cannot be modified, if
you try to modify it, its put into one of the other two states.
Current This state is the
data when you modify it, it holds the modified rows.
Proposed This state is the
proposed data to be sent to the data source. The difference between this and the
Current State is that this one is entered by using Edit Mode and imposes the
rules of the data source immediately (the Current only enforces them when it
updates the dataset).
You don't really need to worry about
these, what we'll be concentrating on is the the current data (with changes).