19 June 2024

Effective ways to validate fields in Business Central 

Ensuring data accuracy and consistency is crucial in enterprise software. Microsoft Dynamics 365 Business Central, a leading ERP solution, offers robust functionality for managing business processes. A critical aspect of this is field validation, which ensures that data entered into the system meets predefined criteria, preventing errors and inconsistencies. 

Understanding Field Validation 

Field validation is essential for maintaining data integrity by ensuring that data entered meets specific criteria. In Business Central, there are several possibilities to implement field validation, each suited to different complexity levels of business rules. 

Methods to validate fields 

We outline several effective methods for performing field validation in Business Central:

1. Validation in Tables: This involves defining validation rules directly within the tables. It is a straightforward approach where basic validation logic is applied as data is entered. This ensures that data meets minimum requirements before it is stored

  • Advantages:
    • Simplicity: Easy to implement for straightforward validation rules.
    • Immediate Feedback: Users receive instant feedback if their input does not meet the criteria. 

  • Limitations:
    • Limited Flexibility: Not ideal for complex validation logic.
    • Code Duplication: Similar validation logic might need to be replicated across multiple tables.
    • Requires basic technical knowledge and skill to implement

2. Using Codeunits:
For more complex validation needs, dedicated codeunits can be utilized. Codeunits allow for the centralization and modularization of validation logic, making the code more maintainable and scalable. This method is particularly useful when validation rules are intricate or need to be reused across different parts of the application. 

  • Advantages:
    • Reusability: Centralized logic can be reused across different tables and forms.
    • Maintainability: Easier to update and manage complex validation logic in one place.
  • Limitations: 
    • Slightly More Complex: Requires advanced technical knowledge and skill and requires additional steps to set up and maintain compared to direct table validation.

3. Event Subscribers:
Another method involves using event subscribers. This approach allows developers to hook into standard Business Central events without modifying the standard code. This enhances flexibility and ensures that custom validations are preserved during updates, making it an excellent choice for extending standard functionality without altering base application code. 

  • Advantages:
    • Flexibility: Can be used to add custom validation logic without modifying the base application.
    • Upgradability: Custom logic remains intact during application updates.
  • Limitations:
    • Complexity: Requires understanding of event-driven programming and the specific events available in Business Central.

Best Practices for Field Validation 

To ensure effective and efficient field validation, it is important to follow best practices. Here are some key guidelines: 

  1. Consistency: Consistency in implementing validation logic is vital. Use similar methods and structures for similar validations to improve code readability and maintenance. Consistent practices help new developers understand and follow the existing logic more easily.
  2. Reusability:Reusable code is key to reducing duplication and simplifying updates. Leverage codeunits and functions to create validation logic that can be applied across different parts of the application. This not only saves time but also ensures that any changes or fixes need to be made only once.
  3. Scalability: Consider the scalability of your validations. As business requirements evolve, validation rules might need to be adapted or expanded. Implement mechanisms that allow for easy modifications and extensions of validation logic without requiring significant code changes.
  4. Performance Optimization: Avoid unnecessary complexity in validations that could lead to performance issues, especially with large datasets or frequently used fields. Optimize validation logic to run efficiently and minimize its impact on the overall system performance. 


Introducing the Field Validation App by 2-Controlware 

For businesses seeking a simpler and more efficient way to implement field validation with less effort and to remain compliant, the [Field Validation App by 2-Controlware](https://www.2-control.nl/nl/field-validation-app) offers an excellent solution. This app provides an easier approach to field validation, reducing the complexity and effort required to maintain compliance with data entry standards. 

Key Benefits of the Field Validation App: 

  1. - Ease of Use: Simplifies the process of setting up and managing field validations, making it accessible even for users with limited technical knowledge.
  2. Flexibility: easy to use, predefined validations types cover all your validation requirements. Customize field validation warning messages to your will. 

  3. Compliance: Helps ensure that data entry practices comply with regulatory standards, reducing the risk of errors and non-compliance. 

  4. Efficiency: Streamlines the validation process, allowing businesses to focus on core operations without worrying about data integrity issues.


Implementing effective field validation in Business Central is crucial for maintaining data integrity and supporting business processes. By leveraging the various available methods—such as table validations, codeunits, and event subscribers—developers can create flexible and scalable validation mechanisms. Adhering to best practices ensures the code remains maintainable and efficient. Additionally, tools like the Field Validation App by 2-Controlware can significantly simplify the process of field validation setup, providing an easy and compliant way to manage data entry standards. 

If you want to know more about our software, you contact us via our contactform, or request a free demo.