-->![Devices Devices](https://www.jobscan.co/blog/wp-content/uploads/linkedin-Headline-examples.png)
![Business Business](https://a.fsdn.com/con/app/proj/orwelldevcpp/screenshots/devcpp5200.png/245/183/1)
An enumeration type, also known as an enum in programming, is a keyword used to declare a type that consists of a set of named constants. The list of named constants is called the enumeration list. Enums can be used as table fields, local and global variables, and parameters.
To declare an
enum
in AL you must specify an ID and a name. The enumeration list consists of values and each of the values are declared with an ID and a value. The value ID is the ordinal value on the enumeration list and must be unique. The following example shows the declaration of an enum, which can be extended, and has the four values; None, Bronze, Silver, and Gold.![Devices Devices](https://www.jobscan.co/blog/wp-content/uploads/linkedin-Headline-examples.png)
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Note
While enums and enumextension objects have object IDs, these are not enforced by the license. In previous versions they reused the range for tables, and were checked against the license at deployment time, but this is no longer the case. Uniqueness validation is now enforced during installation, which will fail if an enum object ID clashes with an already installed enum. Thus, as always, it is important that you use object IDs in your assigned range. This is enforced for AppSource apps, but not for per-tenant extensions, or on-premise. The enum does not have to use the same ID as the table it is put on. Precision tune auto care saint joseph mo.
Important
https://duogenerous980.weebly.com/blog/pcsx2-boot-camp-mac. Only enums with the Extensible Property set to true can be extended.
Enumextension object
![Business Business](https://a.fsdn.com/con/app/proj/orwelldevcpp/screenshots/devcpp5200.png/245/183/1)
Enums can be extended in order to add more values to the enumeration list in which case the
Extensible
property must be set to true
. The syntax for an enum extension, which extends the Loyalty enum with the value Diamond, is shown below. https://duogenerous980.weebly.com/how-to-run-auto-tune.html.Usage
When referencing a defined enum from code, you use the syntax as illustrated below.
enum Loyalty
C Title Options For Business Development
If you want to define an enum as a table field type, use the syntax illustrated below:
Or, as a variable:
In code, you address a specific enum value like in the following example:
Example
The following example illustrates how to define an enum extension of
TypeEnum
, using this in a table extension TableWithRelationExt
and displaying this as a control on a new page.Tip
For another example of how to extend the usage of the
TableRelation
property in connection with enums, see TableRelation Property.Business Central On-Premises
If you want to extend an existing Dynamics 365 on-premises enum, it is possible to mark a table field in C/SIDE as extensible. To enable running C/SIDE and AL side-by-side, see Running C/SIDE and AL Side-by-Side.
Table field options in C/SIDE have three properties to enable enum support:
Property name | Data type |
---|---|
Extensible | Boolean, default value is No. |
EnumTypeId | Integer |
EnumTypeName | Text |
Some table fields share options that are semantically identical. In those cases the EnumTypeId and EnumTypeName must be the same across all the fields. There is no design or runtime check for collision of IDs, but loading generated symbols, see Running C/SIDE and AL Side-by-Side, into the compiler will show collision errors.
Conversions
Conversion to and from
enum
is more strict than for Options
in C/SIDE.- An enum can be assigned/compared to an enum of the same type.
- To be backwards compatible we support conversion to/from any
Option
for now.
For information about assigment compatibility, see AssignmentCompatibility Property.
C Title Options For Business Devices
See Also
C Title Options For Business Dev Program
AL Data Types
TableRelation Property
Extensible Property
Enum Data Type
AssignmentCompatibility Property
TableRelation Property
Extensible Property
Enum Data Type
AssignmentCompatibility Property