I was wondering how to count clicks on Grid View cell ?

The same two ways as you would with any other server side language.

Redirect through a "jump" page and count the numbers there.

Use "AJAX" and have an onclick event on the link that calls a serverside function.

can u give me a link to any example like this on web please?

First you are not giving the code in which you have to error please give it. Yeah I have one code for it please try it...

if(e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes["onClick"] = "location.href='view.aspx?id=" + DataBinder.Eval(e.Row.DataItem, "id") + "'";
}