[Web开发] 检测IE版本号的方法总结
检测浏览器（比如IE）的版本号码是Web 开发最常遇到的问题之一， 以下总结几种检测IE版本号码的方法：
通过Javascript解释浏览器的 User-Agent 字符串：
function getInternetExplorerVersion() // Returns the version of Internet Explorer or a -1 // (indicating the use of another browser). { var rv = -1; // Return value assumes failure. if (navigator.appName == 'Microsoft Internet Explorer') { var ua = navigator.userAgent; var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})"); if (re.exec(ua) != null) rv = parseFloat( RegExp.$1 ); } return rv; } function checkVersion() { var msg = "You're not using Internet Explorer."; var ver = getInternetExplorerVersion(); if ( ver > -1 ) { if ( ver >= 8.0 ) msg = "You're using a recent copy of Internet Explorer." else msg = "You should upgrade your copy of Internet Explorer."; } alert( msg ); }
通过Javascript判断IE渲染引擎的的当前渲染模式：
engine = null; if (window.navigator.appName == "Microsoft Internet Explorer") { // This is an IE browser. What mode is the engine in? if (document.documentMode) // IE8 engine = document.documentMode; else // IE 5-7 { engine = 5; // Assume quirks mode unless proven otherwise if (document.compatMode) { if (document.compatMode == "CSS1Compat") engine = 7; // standards mode } } // the engine variable now contains the document compatibility mode. }
通过ASP.NET 的 HttpBrowserCapabilities 对象:
private float getInternetExplorerVersion() { // Returns the version of Internet Explorer or a -1 // (indicating the use of another browser). float rv = -1; System.Web.HttpBrowserCapabilities browser = Request.Browser; if (browser.Browser == "IE") rv = (float)(browser.MajorVersion + browser.MinorVersion); return rv; } private void Page_Load(object sender, System.EventArgs e) { string msg; double ver = getInternetExplorerVersion(); if (ver > 0.0) { if (ver >= 7.0) msg = "You're using a recent version of Internet Explorer."; else msg = "You should upgrade your copy of Internet Explorer."; } else msg = "You're not using Internet Explorer."; Label1.Text = msg; }
通过HTML的扩展注释语句：
<!--[if gte IE 8]> <p>You're using a recent version of Internet Explorer.</p> <![endif]--> <!--[if lt IE 7]> <p>Hm. You should upgrade your copy of Internet Explorer.</p> <![endif]--> <![if !IE]> <p>You're not using Internet Explorer.</p> <![endif]>
有些方法在之前的blog文章提过
http://blog.csdn.net/WinGeek/archive/2009/02/08/3868150.aspx
http://blog.csdn.net/WinGeek/archive/2009/01/31/3855405.aspx
MSDN参考文章：(1), (2)