Building a lookup for selecting a file

In Dynamics AX, file reading or saving is a very common operation. Most of the non-automated file reading or writing operations prompts the user to specify the file name.

This recipe will demonstrate how the user could be presented with the file browse dialog, in order to choose a file in a convenient way. As an example, we will create a new control called Terms & conditions in the Form setup form in the Procurement and sourcing module, which allows storing of a path to the text document.

How to do it...

1. 1. In the AOT, open the VendFormLetterParameters table and create a new field with the following properties:

   Property	Value
   Type	String
   Name	TermsAndConditions
   Label	Terms & conditions
   ExtendedDataType	FilenameOpen

2. 2. Then add the field to the bottom of the table's PurchaseOrder field group.

3. 3. Next, open the PurchFormLetterParameters form, and create the following four methods:

   public str fileNameLookupTitle()
   {
   return...