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.IntroductionThis document covers 1. Overview of DbProviderFactory in the Background section2. DBHelper class to implement DbProviderFactory concepts3. Pre-requisites for DBHelper class4. Overview of DBHelper classIn addition, this include source codes for 1. DBHelper class2.

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EmployeeDL DataLayer class with the implementationBackgroundSince DotNet evolved, ADO.Net have been getting improvized by trying different approaches. To communicate with different databases ADO.Net have been providing a set of numerous data providers which can be readily accessed under the “System.Data” namespace. For exampleSQL Server - System.Data.SqlClientOracle - System.Data.OracleClientOleDb - System.Data.

OleDbOdbc - System.Data. OdbcetcIn the real world scenario, there are chances of changing databases. As per the current situation, developers use to write code based on a specific data provider, say SQL. But if the database has to be changed to Oracle, the code must be rewritten to support the Oracle data provider, which is really tedious.

To overcome this situation ADO.Net has come up with a generic solution by providing a new namespace under “System.Data” which is “System.Data.Common”.Generalized versions of all data providers are available under this namespace, namely. DbCommand.

DbCommandBuilder. DbConnection. DbDataAdapter. DbDataReader. DbException. DbParameter.

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DbTransactionUsing the codeDBHelper ClassDBHelper class is created with the intension to reduce the coding effort by using the DbProvider Factory concepts.