Browsing for a file

In the first recipe of this chapter, we saw how to use HYPERLINK to open an external file in an appropriate application; in this recipe, we will see how to use an NAV out of the box codeunit to select a file using a dialog box.

How to do it...

1. First create a new codeunit from Object Designer and follow the steps.

2. Then add the following global variables:

   Name	Type	Subtype	Length
   FileMgt	Codeunit	File Management
   SelectedFile	Text		255

3. Next, write the following code in the OnRun trigger of the codeunit:

   SelectedFile := FileMgt.OpenFileDialog('NAV File Browser','*.txt','');
   MESSAGE('You selected %1', SelectedFile);

4. Finally, save and close the codeunit.

How it works...

To carry out file handling activities, NAV provides a codeunit 419 (File Management). It uses .NET interoperability, which allows using the function of the .NET library. The OpenFileDialog function of this codeunit allows us to open a simple dialog box in Open mode. This function takes three parameters...