Gridview in C# ASP.Net

[Jay]

Hi,
I am working in ASP.Net with C# as code behind.

Now i have provided a gridview and i have provided Checkbox and
connected SQL database in it .
it works fine... now i need to to do it in C# .. this is because wheni
click a button i need to display the data from the database .

how to do it? the one i have done is , it displays all the data when i
execute that page.

waiting for ur replay,

Thanks,
Jay