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At the beginning of the day, they’ll need to sync up with the main database to have the latest information available.

During the day, they’ll make modifications to existing customer data, add new customers, and input new orders.

Use disconnected data when your information is primarily read only, but consider other alternatives (such as using Sql Command object for immediate update) when your requirements call for something more dynamic.

Exceptions to the scenario above include situations where you need to update data.

You then have to make a decision, based on the nature of how the data will be used as to your strategy.

These are the mechanics of working with disconnected data.

Because the applications holds on to connections only when necessary, the application becomes more scalable.

The Sql Data Adapter holds the SQL commands and connection object for reading and writing data.

You initialize it with a SQL select statement and connection object: , should have already been instantiated, but not opened.

It is the Sql Data Adapter’s responsibility to open and close the connection during Fill and Update method calls.

As indicated earlier, the Sql Data Adapter contains all of the commands necessary to interact with the data source.

This Lesson shows how to accomplish something in-between Sql Connection and Sql Data Reader interaction by using the Data Set and Sql Data Adapter objects.

A Data Set is an in-memory data store that can hold numerous tables.

Another scenario is making a Web site more scalable.

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