Change row color in gridview based on a field value in c#

I believe you are asking for ASP.NET Grid View . Are the values getting updated automatically ? If yes, You can try to achieve this by using conditional Binding in grid View.

ASP.NET GridView provides the flexibility to use conditional binding expression where we can use some condition with bind expression. Depends on the evaluation value of the expression, ASP.NET GridView will render the content on page.

Conditional Binding Expression with ASP.NET GridView [^]

In your case, you can check the value with the field and apply some color to your grid as needed.

Hope this will help you.