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Visual Basic 2015 Unleashed
book

Visual Basic 2015 Unleashed

by Alessandro Del Sole
July 2015
Intermediate to advanced content levelIntermediate to advanced
1300 pages
87h 27m
English
Sams
Content preview from Visual Basic 2015 Unleashed

The IComparable Interface

You implement the IComparable interface when you want to offer custom comparison instrumentation to your objects. IComparable requires you to implement a CompareTo method that returns an Integer value that is less than zero if the instance is less than the compared object, is zero if the instance equals the compared object, and is greater than zero if the instance is greater than the compared object. For example, imagine you want to provide a comparison to the Person class based on the length of the LastName property. Listing 13.3 shows how you can accomplish this.

LISTING 13.3 Implementing the IComparable Interface

Public Class Person    Implements IComparable    Public Property FirstName ...

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Publisher Resources

ISBN: 9780134196664Purchase book