Module 4: Base Enumerations

Justification:

Correct Answer: As a numerical value

• A. The literal string value is defined in Dynamics AX. This is what end users will see on forms and reports. However, the literal value is not stored in the database.
• B. A different numerical value represents a different choice or literal value for the enumeration. This relationship is defined in Dynamics AX. The value that is stored in the database is the numerical value for the enumeration.
• C. Enumerations do not use alphabetical characters to represent their literal values, but rather numerical values.
• D. This is not correct as base enumerations are represented by numerical values in the database.

Related Lesson: Create a Base Enumeration

Justification:

1. False: This statement is false. The first literal value in a base enumeration is represented by the number 0 by default. The second literal or option in the enumeration is represented by a 1, and so on. These numerical values can also be changed by a developer, however.

Related Lesson: Create a Base Enumeration

Justification: A, C, D

1. A posting type field typically represents a finite list of posting types. This can be represented as a radio button or drop down list on the user interface. A different numerical value can be associated with each literal value of posting type.
2. A transaction date field can have many different values and would be best represented by using the date time or UTC Date Time data type, not a base enumeration.
3. A sales order status field will contain a list of literal values to indicate the status of sales order. For example, “Delivered” can be one value. This list of different sales order statuses is represented by a base enumeration in AX.
4. ABC Codes can store a list of literal values to be represented by a base enumeration. ABC Codes can be used as rating a system for a customer’s credit, for example.

Related Lesson: Create a Base Enumeration

Justification:

• A. Incorrect: Users see the literal string value in the user interface, but the literal value isn’t stored in the database.
• B. Correct: Base enums are stored as numeric values (for example, 0, 1, 2) in the database.
• C. Incorrect: Numerical values, not alphabetical characters, are used when storing base enums in the database.
• D. Incorrect: Only numerical values are stored in the database.

Justification:

• A. Incorrect: Option buttons are base enums that are represented in the user interface.
• B. Incorrect: A slider bar is a base enum that is used in the user interface.
• C. Correct: A date field is an EDT, not a base enum, that is used in the user interface.
• D. Incorrect: A drop-down menu is a base enum that is viewed in the user interface.

You must create an enum type in the AOT before you can declare it.

Base enums are represented as slider bars, drop-down menus, and option buttons.

An enum is a list of literals. Before you can use an enum, you must declare it in Application Explorer.

Hundreds of enumerable types are built into the standard application. For example, the NoYes enum has two associated literals: No has the value 0, and Yes has the value 1.

To reference an enum value, enter the name of the enum, two colons, and then the name of the literal. For example, to use the literal No in the NoYes enum, enter NoYes::No.

Base enums in X++ are used to define custom data types that consist of a predefined set of constant values. These enums provide a way to improve code readability, maintainability, and type safety by allowing developers to work with meaningful labels instead of raw numeric or string values. They are particularly useful for defining options, statuses, or categories in your application. By using base enums, you can ensure that only valid values are assigned to variables or passed as function parameters. This leads to more robust and error-resistant code.

Base enum elements in X++ are implicitly assigned sequential integers, starting from 0 by default. However, you can explicitly assign integer values to enum elements if needed. This feature ensures that each enum element corresponds to a unique numeric value, making it easier to work with these elements in your code.

To reference a base enum element's associated label in X++, you can convert the enum element to a string using the strFmt function or the enum2str function. This allows you to retrieve the user-friendly label associated with the enum element, enhancing the readability and clarity of your code.