Search Multiple Column fields of GridView on single TextBox KeyPress in ASP.Net

Hello, I have a gridview with textbox and that textbox is for searching. My question is do you know how to search with all fields in gridview.

For example:

I have a gridview contains, FIRST NAME, MIDDLE NAME, and LAST NAME, and if I type in the textbox the gridview will automatically get what I've inout in textbox

(textbox is on keypress)

Thank you