IsNull( ) method (JsonObject)

Returns a LOGICAL indicating if a property in a JsonObject contains the null value.

Return type: LOGICAL

Access: PUBLIC

Applies to: Progress.Json.ObjectModel.JsonObject class

Syntax

IsNull(INPUT property-name AS CHARACTER )

property-name

A CHARACTER expression naming the property to be tested.

A JsonError is raised if:

• property-name is the empty string (""), or is the Unknown value (?)
• The property does not exist