Book Image

Microsoft Dynamics NAV 2009 Programming Cookbook

By : Matthew Traxinger
Book Image

Microsoft Dynamics NAV 2009 Programming Cookbook

By: Matthew Traxinger

Overview of this book

Microsoft Dynamics NAV 2009 is a business management solution that helps simplify and streamline highly specialized business processes such as finance, manufacturing, customer relationship management, supply chains, analytics, and electronic commerce for small and medium-sized enterprises. ERP systems like NAV thus become the center of a company's day-to-day operations. When you learn to program in an environment like this it opens up doors to many other exciting areas like .NET programming, SQL Server, and Web Services.Microsoft Dynamics NAV 2009 Programming Cookbook will take you through interesting topics that span a wide range of areas such as integrating the NAV system with other software applications like Microsoft Office, creating reports to present information from multiple areas of the system, and so on. You will not only learn the basics of NAV programming, but you will also be exposed to the technologies that surround the NAV system such as .NET programming, SQL Server, and Web Services.The first half of the cookbook will help programmers coming to NAV for the first time by walking them through the building blocks of writing code and creating objects like tables, forms, and reports. The second half focuses on using the technologies surrounding NAV to build better solutions. You will learn how to write .NET code that works with the NAV system and how to integrate the system with other software applications like Microsoft Office or even custom programs. You will also discover some of the features of the Role Tailored Client including creating Pages and custom add-ins.
Table of Contents (18 chapters)
Microsoft Dynamics NAV 2009 Programming Cookbook
Credits
About the author
About the reviewer
Preface
Index

Manually writing to and reading from files


Apart from the built-in object types for creating text files and XML files, you can also create them manually. This recipe will show you how to write your own code to do this.

How to do it...

  1. Create a new codeunit from Object Designer.

  2. Add the following global variables:

    Name

    DataType

    StreamOut

    OutStream

    FileOut

    File

    StreamIn

    InStream

    FileIn

    File

  3. Add the following code to the OnRun trigger:

    IF NOT FileOut.CREATE('C:\NAVFile.txt') THEN
    IF NOT FileOut.OPEN('C:\NAVFile.txt') THEN
    ERROR('Unable to write to file!');
    FileOut.CREATEOUTSTREAM(StreamOut);
    StreamOut.WRITETEXT('Line 1');
    StreamOut.WRITETEXT();
    StreamOut.WRITETEXT('Line 2');
    StreamOut.WRITETEXT();
    FileOut.CLOSE;
    IF NOT FileIn.OPEN('C:\NAVFile.txt') THEN
    ERROR('Unable to read file!');
    FileIn.CREATEINSTREAM(StreamIn);
    WHILE NOT StreamIn.EOS DO BEGIN
    StreamIn.READTEXT(TextLine);
    MESSAGE('%1', TextLine);
    END;
    FileIn.CLOSE;
    
  4. Save and close the codeunit.

How it works...

First we try to create a...