Force IE 11 "User Agent String" Using Tags

My website is broken in IE11. We all know that HTML tags allow developer to force IE compatibility mode; in example

Solution 1:

I also faced the same problem in my 2003 windows server with .net framework 4.0 and after a long research i found the below is helpful...

I created App_Browsers folder and put a browser file named as ie.browser and pasted the below browser definition text and it started working

<browsers>
<browser id="IE11" parentID="Mozilla">
<identification>
  <userAgent match="Trident\/7.0; rv:(?'version'(?'major'\d+)(\.(?'minor'\d+)?)(?'letters'\w*))(?'extra'[^)]*)" />
  <userAgent nonMatch="IEMobile" />
</identification>
<capture>
  <userAgent match="Trident/(?'layoutVersion'\d+)" />
</capture>
<capabilities>
  <capability name="browser"              value="IE" />
  <capability name="layoutEngine"         value="Trident" />
  <capability name="layoutEngineVersion"  value="${layoutVersion}" />
  <capability name="extra"                value="${extra}" />
  <capability name="isColor"              value="true" />
  <capability name="letters"              value="${letters}" />
  <capability name="majorversion"         value="${major}" />
  <capability name="minorversion"         value="${minor}" />
  <capability name="screenBitDepth"       value="8" />
  <capability name="type"                 value="IE${major}" />
  <capability name="version"              value="${version}" />
</capabilities>
 </browser>

<!-- Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11,0) like Gecko -->
<browser id="IE110" parentID="IE11">
<identification>
  <capability name="majorversion" match="11" />
</identification>

<capabilities>
  <capability name="ecmascriptversion"    value="3.0" />
  <capability name="jscriptversion"       value="5.6" />
  <capability name="javascript"           value="true" />
  <capability name="javascriptversion"    value="1.5" />
  <capability name="msdomversion"         value="${majorversion}.${minorversion}" />
  <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" />
</capabilities>
  </browser>
</browsers>

Solution 2:

Solved! Website is up just installing Dotnet framework 4.5 on server

---

Actually I didn't find a way to force programmatically browsers User agent string (this was the original question). But repaired website with 0 code..

Just made lot of tests and on one server I found out that website was working, on other server it wasn't.

The "good server" was a Win2012, and "bad servers" were Win2008. On Win2012 Aspnet 4.5 was running, and on Win2008 it wasn't.

I installed dotnet framework 4.5 on bad servers too, and everything started working!

Solution 3:

If you don't want to install the entire .NET Framework 4.5, you can just update the .NET Framework 4.0 with this fix from Microsoft http://www.microsoft.com/en-us/download/confirmation.aspx?id=39257 In my case this worked perfectly.

Solution 4:

Put the code in your WebConfig: Working in 2017-2018

  <system.webServer>
  <httpProtocol>
    <customHeaders>
      <add name="X-UA-Compatible" value="IE=Edge" />
    </customHeaders>
  </httpProtocol>
  </system.webServer>