the modalpopupextender is within the gridview
Here's the gridview :
The most important port of the code, is the Template Field Below is its code :
The code in the template field contains, the modalpopupextender as well as the panels and buttons related to it. this makes it a great details window.
Here's the complete code listing:
I'll put the code up for the download soon.
here's the database table used for samples:
the ModalPopupExtender makes it a great and easy way to show the details of a row. Here's a screen shot for what it looks like :