Description
(ActiveX Data Objects for .NET) is a data access technology built into the .NET Framework that allows you to connect to various data sources, retrieve and manipulate data, and perform operations like reading, updating, inserting, and deleting records.
Key Components and Concepts:
- Data Providers: Specialized classes that act as bridges between your C# code and specific data sources, such as SQL Server, Oracle, MySQL, or XML files.
- Connections: Represent a communication channel between your application and the data source, enabling you to send commands and receive results.
- Command Objects: Encapsulate SQL statements or stored procedures to be executed against the database.
- Data Readers: Forward-only, read-only streams of data retrieved from a database, efficient for fast retrieval and processing.
- Data Adapters: Bridge between a DataSet and a data source, used to fill a DataSet with data and reconcile changes back to the database.
- DataSets: In-memory, disconnected representations of data, allowing for offline manipulation and data binding to UI elements.
Common Tasks Using in C#:
- Connecting to a Data Source:
- Specifying connection string details (provider name, server, database name, authentication credentials).
- Executing Commands:
- Using command objects to perform SQL queries, stored procedures, or other database operations.
- Retrieving Data:
- Fetching data using data readers or filling DataSets for further manipulation.
- Manipulating Data:
- Updating, inserting, or deleting records within DataSets or directly through commands.
- Managing Transactions:
- Ensuring data consistency and integrity by grouping operations into logical units.
Benefits of :
- Unified Data Access Model: Consistent programming model across various data sources.
- Disconnected Data Handling: Enables offline data manipulation and enhances scalability.
- Strong Performance: Optimized for efficient data access and manipulation.
- Integrated with .NET Framework: Seamlessly integrates with other .NET technologies.
