IE 异常"_doPostBack is undefined"

Web Server可能由于.Net 2 和.Net 4没有正确安装，导致IE10+的浏览器没有被正确识别，这时需要改变Server的浏览器文件：

1. 找到 ： 

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\Browsers

2. 打开ie.browser文件

添加：

<browser id="IE11Preview" parentID="Mozilla"> <identification> <userAgent match="Trident/(?'layoutVersion'\d+).*rv:(?'revision'(?'major'\d+)(\.(?'minor'\d+)?))" /> <userAgent nonMatch="MSIE" /> </identification> <capabilities> <capability name="browser" value="IE" /> <capability name="layoutEngine" value="Trident" /> <capability name="layoutEngineVersion" value="${layoutVersion}" /> <capability name="isColor" value="true" /> <capability name="screenBitDepth" value="8" /> <capability name="ecmascriptversion" value="3.0" /> <capability name="jscriptversion" value="6.0" /> <capability name="javascript" value="true" /> <capability name="javascriptversion" value="1.5" /> <capability name="w3cdomversion" value="1.0" /> <capability name="ExchangeOmaSupported" value="true" /> <capability name="activexcontrols" value="true" /> <capability name="backgroundsounds" value="true" /> <capability name="cookies" value="true" /> <capability name="frames" value="true" /> <capability name="javaapplets" value="true" /> <capability name="supportsCallback" value="true" /> <capability name="supportsFileUpload" value="true" /> <capability name="supportsMultilineTextBoxDisplay" value="true" /> <capability name="supportsMaintainScrollPositionOnPostback" value="true" /> <capability name="supportsVCard" value="true" /> <capability name="supportsXmlHttp" value="true" /> <capability name="tables" value="true" /> <capability name="supportsAccessKeyAttribute" value="true" /> <capability name="tagwriter" value="System.Web.UI.HtmlTextWriter" /> <capability name="vbscript" value="true" /> <capability name="revmajor" value="${major}" /> <capability name="revminor" value="${minor}" /> </capabilities> </browser>

关于此问题的其他解决方案链接：

http://stackoverflow.com/questions/15273618/ie10-script5009-dopostback-is-undefined

http://www.hanselman.com/blog/BugAndFixASPNETFailsToDetectIE10CausingDoPostBackIsUndefinedJavaScriptErrorOrMaintainFF5ScrollbarPosition.aspx

http://stackoverflow.com/questions/19783852/asp-net-on-net-4-causing-ie11-throw-dopostback-is-undefined-javascript-error

http://stackoverflow.com/questions/18009636/crosspostback-ajax-controls-and-asp-net-generated-postbacks-work-for-net-4-5/19203518#19203518