javascript asp教程第七课--response属性

Below is a table of Response Properties along with examples and explanations.

Response Properties
Buffer Response.Buffer = true
Allows for the buffering of output
CacheControl Response.CacheControl="Public"
Sets Cache to "Public" or "Private"
CharSet Response.CharSet="windows-1252"
Sets the ISO character set
ContentType Response.ContentType="text/HTML"
Specifies the output mime type (text/html, text/plain, GIF, JPG)
Expires Response.Expires=60
Sets page expiration in minutes
ExpiresAbsolute Response.ExpiresAbsolute=#January 31, 2003 13:00:00#
Sets time certain for page to expire
IsClientConnected if (Response.IsClientConnected==true) { }
Determines if client is still connected
PICS ((See Explanation))
Platform for Internet Content Selection
Status Response.Status="401 Unauthorized"
Sets Page Status

You are not required to set, alter, or utilize a single Response Property if you don't want to. Having said that, they can be handy once in while. I've demonstrated all but two Properties in the script below.

By the way, set your properties BEFORE you begin output to the client.

Get Started:

Below is the ASP script for Lesson 07.

<%@LANGUAGE="JavaScript"%>
<%
Response.Buffer=true
Response.CacheControl="Private" 
Response.CharSet="windows-1252"
Response.ContentType="text/HTML"
Response.Expires=-1
Response.Status="200 OK"
%>
<HTML>
<BODY>
<%
if (Response.IsClientConnected==true)
	{
	Response.Write("The client is connected.<BR>")
	}
else
	{
	Response.End()
	}
%>
<TABLE BORDER="2">
<TR>
<%
for (x=1;x<=200;x++)
	{
	Response.Write("<TD>" + x + " </TD>\r")
	if (x%10==0)
		{
		Response.Clear()
		}
	if (x%4==0)
		{
		Response.Write("</TR></TABLE>\r")
		Response.Write("<TABLE BORDER=\"2\">")
		Response.Write("\r<TR>")
		Response.Flush()
		}
	}
%>
</TR></TABLE>
</BODY>
</HTML>

Click Here to run the script in a new window. After you click onto the link, really study the numbers. See if you notice anything weird about the page, like missing numbers.

Response.Buffer:

Let's take the Properties in order of appearance in our script. Response.Buffer allows us to control the output via Response.Flush() and Response.Clear(). If you haven't already, click onto the link to run the script. You'll get a strange output with some of the numbers missing. The missing numbers are thanks to Response.Clear(). You might notice that Response.Flush() slows down the server TREMENDOUSLY. Don't use this method without a reason.

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