Used to determine if field value is NULL.
Syntax:
function FieldIsNull(aFieldIndex : integer) : boolean;overload;
function FieldIsNull(aFieldName : string) : boolean;overload;
Description:
FieldIsNull are used to determine if field value is NULL in active record. First implementation checks field by it index. Second implementation checks field by it name.
Returns:
FieldIsNull returns True if value of requested field is NULL in current record and False if value is not NULL.
See also: FieldValues property, FieldValueByFieldName method