datagrid question

using 2003 and C#;

I have a datagrid with these columns:

ID Filename Size View Download


- the ID column is invisible so I can get it's value
- the View and Download columns are image buttons

Questions:

1) if View is clicked, how do I display it in a new browser window?

2) if the file should not be viewed, only downloaded ( ex. and EXE
file ), how do I make the view icon visible/invisible row by row?


Thanks