ADO.NET Tutorial - Data Readers

Introduction

TheADO.NET library provides a powerful and flexible way to interact with databases in .NET applications. Data Readers allow you to easily retrieve data from various database tables using SQL queries.

This tutorial will cover the fundamentals of Data Readers, including how to execute basic queries and handle results.

Data Reader Basics

A Data Reader is a core component of the ADO.NET library that allows you to execute SQL queries against a database and retrieve data.

It handles the complexities of SQL syntax, data types, and error handling.

Executing a Simple Query

Let's demonstrate a basic query to retrieve the names of all users from a table.

We will use SQL: `SELECT name FROM Users;`

Execute Query

Data Reader Example

Here's a more complex query:

`SELECT name, email FROM Users;`

Execute Query

Error Handling

It's crucial to handle errors gracefully. If the query doesn't find any rows, it will return an empty result set.

Execute Query with Error Handling