Response. ContentType controls the output file type (discussing the problem of downloading files)

The data packet sent from the server to the client can be text/html or gif/jpeg image files. Therefore, before each transmission, we must inform the client of the file type to be transmitted, generally, it is of the "Text/Html" type by default.
<% Response. ContentType = "text/HTML" %>
<% Response. ContentType = "image/GIF" %>
<% Response. ContentType = "image/JPEG" %>
<% Response. ContentType = "text/plain" %>
<% Response. ContentType = "image/JPEG" %>
<% Response. ContentType = "application/x-cdf" %>
Used to return text content rather than interpreted HTML statements
Response. ContentType = "text/plain"
<%
Response. ContentType = "text/plain"
Will Response. write (now () & "be executed? ")
%>

You can note that the page provides download, and the ASP content on the page is interpreted and executed.
Program files are provided for download as XLS files
Response. ContentType = "application/vnd. ms-excel"
<%
Response. ContentType = "application/vnd. ms-excel"
Response. write ("the download dialog box is displayed for debugging on this page. The Save type is XLS ")
%>

Achieve continuous playing of songs
Response. ContentType = "audio/x-pn-realaudio"
<%
Dim ramstr
Ramstr = ""
Set rs = server. createobject ("adodb. recordset ")
SQL = "XXXXXXXXXXX"
Rs. open SQL, conn, 1, 3 'conn defined
Do while not rs. eof
Ramstr = ramstr & rs ("url") & vbCrLf
Rs. movenext
Loop
Rs. close
Response. ContentType = "audio/x-pn-realaudio"
'Response. ContentType = "audio/x-mpegurl"