user input to Query database

Question

I am trying to write code so the user can input in a textbox a value to be used in a dataset query. Example, I have a database of customers, I would like the user to be able to enter a customers name in a text box, then populate the datagrid with only the customers with that name, and be able to update/delete etc that record. I currently can populate my datagrid with only the entire database.