Asp. NET browser definition file and IE compatibility mode

Due to a small bug in asp.net4.0, the callback of the ASP. WebForms control is not valid, and some controls are not available.

The workaround is to add a custom browser definition file to the project, refer to here: http://www.hanselman.com/blog/ Bugandfixaspnetfailstodetectie10causingdopostbackisundefinedjavascripterrorormaintainff5scrollbarposition.aspx

is to add IE.browser and firefox.browser two files under the App_Browsers of the project.

In addition, for the website to use IE8 document mode, to prevent the display problem in Ie10 or Ie11 browser, you can set the browser's document mode to IE8 through the program.

For an ASP. Web site, you can add a custom HTTP header as follows:

<?xml version= "1.0" encoding= "Utf-8"?><configuration>  <system.webServer>    < httpprotocol>      <customHeaders>        <clear/>        <add name= "x-ua-compatible" value= "ie= EmulateIE8 "/>      </customHeaders>    
Reference: http://msdn.microsoft.com/zh-cn/library/cc288325 (v=vs.85). aspx
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