Book Image

Programming Microsoft Dynamics NAV - Fifth Edition

By : Marije Brummel, David Studebaker, Christopher D. Studebaker
Book Image

Programming Microsoft Dynamics NAV - Fifth Edition

By: Marije Brummel, David Studebaker, Christopher D. Studebaker

Overview of this book

Microsoft Dynamics NAV is a full business solution suite, and a complete ERP solution that contains a robust set of development tools to support customization and enhancement. These tools provide greater control over financials and can simplify supply chain, manufacturing, and operations. This book will take you from an introduction to Dynamics NAV and its integrated development tools to being a productive developer in the Dynamics NAV Development Environment. You will find this book very useful if you want to evaluate the product's development capabilities or need to manage Dynamics NAV based projects. It will teach you about the NAV application structure, the C/SIDE development environment, the C/AL language paired with the improved editor, the construction and uses of each object type, and how it all fits together to build universal applications. With this new edition, you will be able to understand how to design and develop using Patterns and new features such as Extensions and Events.
Table of Contents (10 chapters)

Validation functions

C/AL includes a number of utility functions designed to facilitate data validation or initialization. Some of these functions are as follows:

  • INIT


The TESTFIELD function is widely used in standard NAV code. With TESTFIELD, we can test a variable value and generate an error message in a single statement if the test fails. The syntax is as follows:

Record.TESTFIELD (Field, [Value])

If a Value is specified and the field does not equal that value, the process terminates with an error condition and an error message is issued.

If no Value is specified, the field contents are checked for values of zero or blank. If the field is zero or blank, then an error message is issued.

The advantage of TESTFIELD is ease...