Parent& Child Grid Problem

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C#

ASP.NET

C#4.0

I have a nested Gridview, in my child Grid Footer template i have a DDL & TextBox and LinkButton.

My DDL having material's and i choose the material based on selction and in my textBox i entered Quantity for selected material and click on LinkButton then that details to be added into my ChildGrid DataRow.


Now, my question is if i'm select Material and without enter Quantity then i click on Button means i want to show "*" it means mandatory to enter value against to selection...

For that i'm using required field validator, but for each and every parent grid row it's showing the required..

But my parent grid having 10 rows , when i use required field in each and every row it showing "*", but i want to show only row0 of the parent....

Is it possible to fetch the unique value of Requiredfield validator.
If it's possible then please give some suggestion's to achieve this..


How to do this can anyone help me to resolve this issue....