asp.net判断浏览器版本代码

string   UserBrowser=Request.Browser.Browser; //浏览器名称

string   BrowserVersion=Request.Browser.Version;   //浏览器版本

 以下摘自MSDN

HttpBrowserCapabilities   bc   =   Request.Browser;
  Response.Write( " <p> Browser   Capabilities: </p> ");
  Response.Write( "Type   =   "   +   bc.Type   +   " <br> ");
  Response.Write( "Name   =   "   +   bc.Browser   +   " <br> ");
  Response.Write( "Version   =   "   +   bc.Version   +   " <br> ");
  Response.Write( "Major   Version   =   "   +   bc.MajorVersion   +   " <br> ");
  Response.Write( "Minor   Version   =   "   +   bc.MinorVersion   +   " <br> ");
  Response.Write( "Platform   =   "   +   bc.Platform   +   " <br> ");
  Response.Write( "Is   Beta   =   "   +   bc.Beta   +   " <br> ");
  Response.Write( "Is   Crawler   =   "   +   bc.Crawler   +   " <br> ");
  Response.Write( "Is   AOL   =   "   +   bc.AOL   +   " <br> ");
  Response.Write( "Is   Win16   =   "   +   bc.Win16   +   " <br> ");
  Response.Write( "Is   Win32   =   "   +   bc.Win32   +   " <br> ");
  Response.Write( "Supports   Frames   =   "   +   bc.Frames   +   " <br> ");
  Response.Write( "Supports   Tables   =   "   +   bc.Tables   +   " <br> ");
  Response.Write( "Supports   Cookies   =   "   +   bc.Cookies   +   " <br> ");
  Response.Write( "Supports   VB   Script   =   "   +   bc.VBScript   +   " <br> ");
  Response.Write( "Supports   JavaScript   =   "   +   bc.JavaScript   +   " <br> ");
  Response.Write( "Supports   Java   Applets   =   "   +   bc.JavaApplets   +   " <br> ");
  Response.Write( "Supports   ActiveX   Controls   =   "   +   bc.ActiveXControls   +   " <br> ");
  Response.Write( "CDF   =   "   +   bc.CDF   +   " <br> ");

如何在下载文件名中使用UTF-8编码

版权声明：可以任意转载，但转载时必须标明原作者charlee、原始链接http://tech.idv2.com/2009/03/05/use-utf8-in-download-filename/以及本声明。

通过把Content-Type设置为application/octet-stream， 可以把动态生成的内容当作文件来下载，相信这个大家都会。 那么用Content-Disposition设置下载的文件名， 这个也有不少人知道吧。 基本上，下载程序都是这么写的：

<?php
$filename = "document.txt";
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=' . $filename);

print "Hello!";
?>

这样用浏览器打开之后，就可以下载document.doc。

但是，如果$filename是UTF-8编码的，有些浏览器就无法正常处理了。 比如把上面那个程序稍稍改一下：

<?php
$filename = "中文 文件名.txt";
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=' . $filename);

print "Hello!";
?>

把程序保存成UTF-8编码再访问，IE6下载的文件名就会乱码。 FF3下下载的文件名就只有“中文”两个字。Opera 9下一切正常。

输出的header实际上是这样子：

Content-Disposition: attachment; filename=中文 文件名.txt

其实按照RFC2231的定义， 多语言编码的Content-Disposition应该这么定义：

Content-Disposition: attachment; filename*="utf8''%E4%B8%AD%E6%96%87%20%E6%96%87%E4%BB%B6%E5%90%8D.txt"

即：

• filename后面的等号之前要加 *
• filename的值用单引号分成三段，分别是字符集(utf8)、语言(空)和urlencode过的文件名。
• 最好加上双引号，否则文件名中空格后面的部分在Firefox中显示不出来
• 注意urlencode的结果与php的urlencode函数结果不太相同，php的urlencode会把空格替换成+，而这里需要替换成%20

经过试验，发现几种主流浏览器的支持情况如下：

IE6	attachment; filename="<URL编码之后的UTF-8文件名>"
FF3	attachment; filename="UTF-8文件名"
	attachment; filename*="utf8''<URL编码之后的UTF-8文件名>"
O9	attachment; filename="UTF-8文件名"
Safari3(Win)	貌似不支持？上述方法都不行

这样看来，程序必须得这样写才能支持所有主流浏览器：

<?php

$ua = $_SERVER["HTTP_USER_AGENT"];

$filename = "中文 文件名.txt";
$encoded_filename = urlencode($filename);
$encoded_filename = str_replace("+", "%20", $encoded_filename);

header('Content-Type: application/octet-stream');

if (preg_match("/MSIE/", $ua)) {
	header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
} else if (preg_match("/Firefox/", $ua)) {
	header('Content-Disposition: attachment; filename*="utf8\'\'' . $filename . '"');
} else {
	header('Content-Disposition: attachment; filename="' . $filename . '"');
}

print 'ABC';
?>