The Connection Object is an integral part of the ADO.NET Data Provider, serving as a means to establish and maintain a connection with the data source. It represents a unique session between the application and the data source, enabling communication and data exchange.
To establish a connection, the Connection Object requires the necessary information to identify and authenticate with the data source. This information is typically provided through a connection string, which contains details such as the server name, database name, credentials, and other parameters required to establish the connection.
When the Connection Object connects to the specified data source, it initiates a connection between the application and the data source. This connection allows SQL commands and queries to be executed against the data source using the Command Object. The Command Object is responsible for issuing SQL statements, stored procedures, or other database operations to retrieve or manipulate data.
Once the desired database activity is completed, it is important to close the Connection Object to release the resources held by the data source. This ensures efficient resource management and prevents unnecessary connections from consuming system resources.
The specific type of Connection Object used depends on the data source system being utilized. For example, when working with Microsoft SQL Server, the SqlConnection object is used to establish a connection. Other data providers, such as the OleDbConnection or OdbcConnection, are employed when working with different database systems.
The following are the commonly used Data Providers for ADO.NET applications.
By using the Connection Object appropriately, developers can establish secure and efficient connections with data sources, execute SQL commands, retrieve or manipulate data, and ensure proper resource management within their applications.