Visual Basic® 2012 How to Program, Sixth Edition

11. Introduction to LINQ

You shall listen to all sides and filter them from your self.

—Walt Whitman

Objectives

In this chapter you’ll learn:

• Basic LINQ concepts.

• How to query an array using LINQ.

• How to sort an array in ascending or descending order using LINQ.

• How to perform transformations on the results of a LINQ query.

• How to select a portion of the properties for each object in a query result.

• How to create new objects as the result of a LINQ query.

• How a LINQ query executes only when you iterate over the results—a concept called deferred execution.

Outline

11.1 Introduction

11.2 Querying an Array of Primitive-Type Elements Using LINQ

11.3 Querying an Array of Reference-Type Elements Using LINQ

11.4 Deferred Execution and ...