Working with the Variant datatype
The Variant datatype is widely used in the Component Object Model to represent variables with no explicitly defined type. The datatype of the value stored in a Variant variable can be defined at runtime, when the value is assigned.
C/AL supports Variant variables and a variety of functions that help to identify the type of a variable content.
The following example runs a database query through the ActiveX Data Objects (ADO) library. Field values in the resulting recordset are returned as Variant data that can be interpreted by the client C/AL code.
How to do it...
The code for this example will be implemented in a
Pageobject. Run the NAV object designer and create a page. Select the Customer table as a data source from the page, and then select the List page type in the page wizard.In the Action Designer page, create a
Show Balanceaction button. Open the action trigger code and declare local variables required in the function:Name
DataType
Subtype...
