I've Googled this with no success. I'm using SQL Server Profiler for SQL Server 2008 R2, and I've ensured that for the 'Events Selection' of the trace:
I then start the trace after I've loaded an .aspx page, but just before I carry out an action that calls a certain SQL stored procedure.
I can then see at the start of my trace that under the 'EventClass' column I have 'ExistingConnection', however the 'TextData' for these events doesn't seem to identify the database I'm connecting to - it's telling me the main database settings (e.g. set ansi_padding on). I can also see that for certain events I can see the 'NTUserName', which gives me some clues. What I want to find though is which database am I connecting to. Who wants some points for telling the community? :)
When you create a new trace with SQL Server Profiler, a dialog is displayed titled "Trace Properties".
In the lower-right-hand corner you should see a checkbox labeled "Show all columns. Check it. Now scroll the table to the left and you should see a checkbox labeled "Database Name". Check that, and start the trace!