C# - Retrieving Many Huge Sized EPS Files And Converting Them To JPEG In Application?

I have many (>600) EPS files(300 KB - 1 MB) in database. In my ASP.NET application (using ASP.NET 4.0) I need to retrieve them one by one and call a web service which would convert the content to the JPEG file and update the database (JPEGContent column with the JPEG content). However, retrieving the content for 600 of them itself takes too long from the SQL management studio itself (takes 5 minutes for 10 EPS contents).

So I have two issues:-

1) How to get the EPS content ( unfortunately, selecting certain number of content is not an option :-( ):-

Approach 1:-

foreach(var DataRow in DataTable.Rows)
{
// get the Id and byte[] of EPS
// Call the web method to convert EPS content to JPEG
}

or

foreach(var DataRow in DataTable.Rows)
{
// get only the Id of EPS
// Hit database to get the content of EPS
// Call the web method to convert EPS content to JPEG
}

or

Any other approach?

2) Converting EPS to JPEG using a web method for >600 contents. Ofcourse, each call would be a long running operation. Would task parellel library (TPL) be a better way to achieve this?

Also, is doing the entire thing in a SQL CLR function a good idea?

EDIT :- Unfortunately, I have to do this in the ASP.NET application itself and doing that in a separate process like Windows service is not an option.