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POASP.net not generating javascript for some User Agents
 

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    <p>********************Edit 2********************** I figured out the problem... But I don't like the implications. I was testing our iPhone targeted mobile application earlier and using a plugin to mask Firefox's User Agent String as an iPhone.</p> <p>.Net was infact NOT generating the required code for post backs based on that piece of information alone.</p> <p>I do not like this however, because since the iPhone and other multimedia devices can interpret javascript, ASP.net is breaking any application that relies on server generated javascript to run.</p> <p>So, if the community will allow it... I'd like to change my official question to... Why will ASP.net not generate javascript for specific browsers and how can I turn this "feature" off.</p> <p>*************** End Edit 2 ***************</p> <p>I've got a weird problem. I copied some working code from my remote host to my computer at work. When I try to use the page I'm getting a javascript error </p> <pre><code>__doPostBack is not defined javascript:__doPostBack('ctl00$ContentPlaceHolder1$login','')()() </code></pre> <p>When I few the output page source, sure enough there is no server side generated javascript.</p> <p>I tried creating a simple page:</p> <pre><code>&lt;%@ Page Language="VB" AutoEventWireup="false" CodeFile="jsTest.aspx.vb" Inherits="_jsTest" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;asp:TextBox ID="tbTest" runat="server"&gt;&lt;/asp:TextBox&gt;&lt;br /&gt; &lt;asp:LinkButton ID="linkTest" runat="server"&gt;LinkButton&lt;/asp:LinkButton&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Codebehind:</p> <pre><code>Partial Class _jsTest Inherits System.Web.UI.Page Protected Sub linkTest_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles linkTest.Click Response.Write(tbTest.Text) End Sub End Class </code></pre> <p>Getting the same error.</p> <p>I've tried rebooting (hey, it works half the time), cleared out everything from App_Code, global.asax and web.config, added a textbox with autopostback=true... I'm out of ideas.</p> <p>Can anyone shed some light on what's happening here?</p> <p>**************More Information************** I just tried everything again in IE and it works as expected, the page source shows: </p> <pre><code>&lt;input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" /&gt; &lt;input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" /&gt; &lt;input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKLTkxNTA2MDE2NWRkxhZMwlMVwJprcVsvQLJLrTcgaSM=" /&gt; &lt;script type="text/javascript"&gt; //&lt;![CDATA[ var theForm = document.forms['form1']; if (!theForm) { theForm = document.form1; } function __doPostBack(eventTarget, eventArgument) { if (!theForm.onsubmit || (theForm.onsubmit() != false)) { theForm.__EVENTTARGET.value = eventTarget; theForm.__EVENTARGUMENT.value = eventArgument; theForm.submit(); } } //]]&gt; &lt;/script&gt; &lt;div&gt; &lt;input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWAwK20LZAAuzRsusGAsz0+6YPxxO+Ewv1XsD5QKJiiprrGp+9a3Q=" /&gt; &lt;/div&gt; </code></pre> <p>While the source in Firefox only shows:</p> <pre><code>&lt;input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKLTkxNTA2MDE2NWRkxhZMwlMVwJprcVsvQLJLrTcgaSM=" /&gt; &lt;input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWAwK20LZAAuzRsusGAsz0+6YPxxO+Ewv1XsD5QKJiiprrGp+9a3Q=" /&gt; </code></pre> <p>Saving the web pages to the desktop and opening in notepad reveals the same thing...</p>
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    1. COI'm doing some research... It seems to be something you can fix with a <browserCaps> section in web.config or machine.config. By default unknown browsers are being treated like old browser incapable of javascript.
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