Learn how to create a drop-down list using Data Validation in Excel. Data Validation limits the type of data that can be entered into a cell.

Learn how to use a data validation control to allow users to select when to run multiple VBA procedures in Microsoft Excel.

How to base a data validation dropdown on an array in Excel Now we’re ready to create the data validation dropdown that will display the unique list in column H.

How to use Data Validation for Excel Cells Data validation feature in Excel lets a user control what can be entered into a cell or provide a predefined list of acceptable entries to eliminate ...

Discover how a custom data validation tool is transforming education. Learn how we applied statistics to achieve fairness in peer reviews. See how we successfully scaled the "Design Data Products ...

Take advantage of data annotations to decorate your models using attribute tags so that your application’s data definition can be managed in a single place.

Take advantage of the FluentValidation open-source library to validate data in your ASP.NET Core application and keep your code clean, organized, and maintainable.