如何获得服务器和客户端页面的总加载时间？

I am measuring performance of an ASP.NET page. I need to measurement two parts: 1) The server page load time (to calculate the time it takes to bind controls from data loaded from database) and 2) measure the difference between the millisecond that the server's PageLoad event started and the millisecond that the client has finished loading (because I want to be able to calculate the time it took for the client browser to download and render the HTML).I am measuring performance of an ASP.NET page.