Use Excel data validation to prevent duplicate values in ... In this article, I’ll show you how to do this in a Table object using structured referencing and named ranges. I’m using Office ...

I recommend that you use them whenever possible. To remove an item from the drop-down, remove it from the Table. We can expand on the Table topic, because if you add a data validation drop-down to ...

and specify validation rules. This article talks about data annotations, why they are useful, and how to use them in our .NET Core applications. To work with the code examples provided in this ...

If you see the error “This value doesn’t match the data validation restrictions defined for this cell” when entering a value in an Excel cell, the solutions ...