On my MS FrontPage-based web site I used Java WebStart without any problems. Clicking on a hyperlink to a JNLP-file started the application. MS ASP.NET does not support the JNLP file type and one has to use an event handler and make a binary write when the user clicks the link. C# code (posted on Internet several years ago):

private void outputJnlp(String fp) {

FileStream fs;

long FileSize;

fs = new FileStream(fp, FileMode.Open);

FileSize = fs.Length;

byte[] Buffer = new byte[(int)FileSize];

fs.Read(Buffer, 0, (int)FileSize);

fs.Close();

Response.Clear();

Response.ClearHeaders();

Response.ContentType = "application/x-java-jnlp-file";

Response.BinaryWrite(Buffer);

Response.End();

}

This works fine in MS Visual Studio running ASP.NET 2.0 (The browser is not supported....), but not on my production site (web hotel), also running ASP.NET 2.0, where I get HTTP Error 404 File Not Found when trying to get the file. All files reside on the same disk. Yes, I have changed the JNLP codebase value to the production site URL. How to debug? I would be very grateful if anybody has a clue.