Browsing for a file

You will perform many modifications that require input from a file on the Windows file system. Instead of requiring the user to remember the full path and name of the file, we will show you how to use an out-of-the-box codeunit to let them select the file using a dialog box.

How to do it...

1. Create a new codeunit from Object Designer.

2. Add the following global variables:

   Name	Type	Subtype	Length
   CommonDialogMgt	Codeunit	Common Dialog Management
   SelectedFile	Text		255

3. Add the following code to the OnRun trigger:

   SelectedFile := CommonDialogMgt.OpenFile('NAV File Browser', SelectedFile,1,'Filter',0);
   MESSAGE('You selected %1', SelectedFile);
   

4. Save and close the codeunit.

How it works...

NAV provides a codeunit, number 412, named Common Dialog Management. It uses an OCX that references to the Microsoft Common Dialog Control. This codeunit provides a function that allows you to open a simple dialog box in either Open or Save mode. This function, OpenFile, takes five parameters...