繁體中文当前位置: 首页 > 图文教程 > 网络编程 > ASP > javascript asp教程第七课--response属性
- ASP
- 使用索引服务器 - 创建ASP页面
- 使用索引服务器 - 增加属性
- 用TDC建立自己的数据库格式
- 较长text型数据无法在Asp页面中取出的解决办法
- 用ASP控制Flash
- 计算ASP页面的载入时间
- 页面延迟的两个简单方法
- 将ASP生成的内容写入响应流中最有效的方法
- 如何使用asp创建dsn?
- 清除浏览器历史记录代码
- 不离开页面刷新数据
- 得到表中字段属性代码
- 用js制作完善的日，月组合下拉框.
- WEB页面实现淡入淡出菜单
- 不用组件来实现StrCat函数的功能
- 不用java的垂直滚动看板
- 使用Server.scripttimeout来减少ASP意外错误而使务器瘫痪
- ODBC Drivers错误80004005的解决办法
- 用ASP方式实现动态伸缩形式列表主页
- 如何使ASP程序暂停指定的时间后再继续执行
ASP 中的 javascript asp教程第七课--response属性
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-13 浏览: 152 ::
收藏到网摘: n/a
Below is a table of Response Properties along with examples and explanations.
| 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.
Response.CacheControl:
CacheControl gives you the power to authorize proxy servers to keep your page in cache. (That would be the "Public" setting.) Likewise, it allows you to disallow proxy servers from caching your page. (That would be the "Private" setting). The default is "Private."
Response.CharSet:
CharSet allows you to specify the character set, for example: "ISO 8859-1".
Response.ContentType:
ContentType allows you to indicate the mime type of the output. For example there is text/plain and text/html. There is also GIF and JPEG.
Response.Expires:
Expires allows you set an expiration time for the page. By setting the Expires property to -1, you are saying the page expired one minute before it was delivered. The browser will (hopefully) not store it in cache, but rather make a separate request to the server before re-displaying the page.
Response.Status:
If tomorrow Congress were to pass a law forbidding the use of Response.Status, I think life would go on. If it makes you happy, use it.
Response.IsClientConnected:
IsClientConnected does exactly what it says. It returns a Boolean value that you can use in an "if" statement.
Response.PICS:
PICS stands for Platform for Internet Content Selection. It allows pages to be rated for the presence of violence, sexuality, language and nudity. There are services on the internet to rate your site. I've never used one. I found a sample PICS string on the internet and I converted to JavaScript.
Response.PICS("(PICS-1.1 <http://www.rsac.org/ratingv01.html> labels on \"1997.01.05T08:15-0500\" until \"1999.12.31T23:59-0000\" ratings (v 0 s 0 l 0 n 0))")
It's a long string and your browser may have wrapped the text down to a second line. If that's the case, then you have to pretend that the entire PICS string is on one line.
Response.ExpiresAbsolute:
I did not demonstrate ExpiresAbsolute in the script because I already used Response.Expires. ExpiresAbsolute does exactly the same thing as Expires, except it uses a date and time certain. (I couldn't see using both in the same script.) The only thing I would point out is the pound signs (#) at the beginning and and of the date.
评论 (0) All
