Encountering issues with postback functionality on an ASP.NET webpage while attempting to integrate Google

Question

Encountering issues with postback functionality on an ASP.NET webpage while attempting to integrate Google

Creating a small web app using ASP.NET has been going smoothly, until I encountered an issue with LinkButton controls after adding Google Analytics code to one of my pages. Every time I click on a link button, I receive this error message:

Microsoft JScript runtime error: The value of the property '__doPostBack' is null or undefined, not a Function or object

All other links and controls on the page are working fine except for the LinkButtons. Removing the Google Analytics script resolves the problem, leading me to believe there is some conflict between the script and the LinkButton controls triggering postbacks on the page.

LATEST UPDATE. Further analysis revealed that without the Google Analytics script reference, the HTML generated by ASP.NET appears normal:

However, when the Google Analytics code is included, the structure of the HTML becomes distorted:

Take a look at that form tag placement! It seems that the postback error is attributed to the LinkButton controls being positioned outside the ASP.NET form. But why? END OF UPDATE.

If you have any suggestions on how to resolve this issue, I would greatly appreciate it. Thank you.

FINAL UPDATE. Through extensive troubleshooting, I was able to identify a solution on my own. I have shared my findings in a response below. Appreciation to all who contributed answers here. END OF UPDATES.

javascript asp.net google-analytics postback linkbutton

Answer 1

Answer №1

Through a series of adjustments, assistance from technical support, and trial and error, I was able to resolve the issue at hand. The initial version of my code appeared as follows:

<head runat="server">
    <title><asp:ContentPlaceHolder ID="cphPageTitle" runat="server"></asp:ContentPlaceHolder></title>
    <link href="_private/Normal.css" rel="stylesheet" type="text/css" />
    <script src="_private/GoogleAnalytics.js" type="text/javascript" />
</head>

This snippet led to the problem that I detailed in my original post. However, by making a simple change to the code, everything started working smoothly. Here is the revised version:

<head runat="server">
    <title><asp:ContentPlaceHolder ID="cphPageTitle" runat="server"></asp:ContentPlaceHolder></title>
    <link href="_private/Normal.css" rel="stylesheet" type="text/css" />
    <script src="_private/GoogleAnalytics.js" type="text/javascript"></script>
</head>

It's worth noting the change in the closing tag for the script element. Initially, I believed using a self-closing tag would have no impact, but it turns out the behavior differs based on how the tag is closed. This thread on Stack Overflow provided insight into this aspect.

Answer 2

Through a series of adjustments, assistance from technical support, and trial and error, I was able to resolve the issue at hand. The initial version of my code appeared as follows:

<head runat="server">
    <title><asp:ContentPlaceHolder ID="cphPageTitle" runat="server"></asp:ContentPlaceHolder></title>
    <link href="_private/Normal.css" rel="stylesheet" type="text/css" />
    <script src="_private/GoogleAnalytics.js" type="text/javascript" />
</head>

This snippet led to the problem that I detailed in my original post. However, by making a simple change to the code, everything started working smoothly. Here is the revised version:

<head runat="server">
    <title><asp:ContentPlaceHolder ID="cphPageTitle" runat="server"></asp:ContentPlaceHolder></title>
    <link href="_private/Normal.css" rel="stylesheet" type="text/css" />
    <script src="_private/GoogleAnalytics.js" type="text/javascript"></script>
</head>

It's worth noting the change in the closing tag for the script element. Initially, I believed using a self-closing tag would have no impact, but it turns out the behavior differs based on how the tag is closed. This thread on Stack Overflow provided insight into this aspect.

Answer 3

Answer №2

Following keyboardP's advice, it is recommended to place the google analytics script within the <body> element, ideally towards the end (right before the closing </body> tag) to prevent any delays in loading the page. Check out http://developer.yahoo.com/performance/rules.html#js_bottom for further explanation.

Moreover, it is likely that the Google Analytics script introduces elements (such as the <input>) which are not valid within the <head> element, potentially causing the current configuration to severely disrupt your webpage.

Answer 4

Following keyboardP's advice, it is recommended to place the google analytics script within the <body> element, ideally towards the end (right before the closing </body> tag) to prevent any delays in loading the page. Check out http://developer.yahoo.com/performance/rules.html#js_bottom for further explanation.

Moreover, it is likely that the Google Analytics script introduces elements (such as the <input>) which are not valid within the <head> element, potentially causing the current configuration to severely disrupt your webpage.

Answer 5

Answer №3

That's not the correct method for adding the Google Analytics code. You should follow these steps:

<script type="text/javascript>

  var _gaq = _gaq || [];
  _gaq.push(['_setAccount', 'UA-XXXXX-X']);
  _gaq.push(['_trackPageview']);

  (function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
  })();

</script>

Make sure to paste this code right before the </head> tag as recommended by Google:

http://www.google.com/support/analytics/bin/answer.py?hl=en_US&answer=174090&utm_id=ad

Answer 6

That's not the correct method for adding the Google Analytics code. You should follow these steps:

<script type="text/javascript>

  var _gaq = _gaq || [];
  _gaq.push(['_setAccount', 'UA-XXXXX-X']);
  _gaq.push(['_trackPageview']);

  (function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
  })();

</script>

Make sure to paste this code right before the </head> tag as recommended by Google:

http://www.google.com/support/analytics/bin/answer.py?hl=en_US&answer=174090&utm_id=ad

Answer 7

Answer №4

I follow the technique outlined by Mathias Bynens:

<script>

    var _gaq = [['_setAccount', 'UA-XXXXX-X'], ['_trackPageview']];

    (function(d, t) {

        var g = d.createElement(t),
            s = d.getElementsByTagName(t)[0];

        g.async = g.src = '//www.google-analytics.com/ga.js';
        s.parentNode.insertBefore(g, s);

    }(document, 'script'));

</script>

Moreover, Google recommends placing this script high up in the document to track visitors who may leave before the page fully loads. However, personally, I prefer placing it just before the closing </body> tag to ensure that all tracked visitors have loaded the page completely.

Answer 8

I follow the technique outlined by Mathias Bynens:

<script>

    var _gaq = [['_setAccount', 'UA-XXXXX-X'], ['_trackPageview']];

    (function(d, t) {

        var g = d.createElement(t),
            s = d.getElementsByTagName(t)[0];

        g.async = g.src = '//www.google-analytics.com/ga.js';
        s.parentNode.insertBefore(g, s);

    }(document, 'script'));

</script>

Moreover, Google recommends placing this script high up in the document to track visitors who may leave before the page fully loads. However, personally, I prefer placing it just before the closing </body> tag to ensure that all tracked visitors have loaded the page completely.

Answer 9

Answer №5

Simply

<script type="text/javascript">
    if (!<%=Page.IsPostBack.ToString().Tolower()%>)
    {
        var _gaq = _gaq || [];
        _gaq.push(['_setAccount', 'UA-xxxxxxxx-xx']);
        _gaq.push(['_trackPageview']);
        (function() {
            var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
            var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
        })();
    }
</script>

Answer 10

Simply

<script type="text/javascript">
    if (!<%=Page.IsPostBack.ToString().Tolower()%>)
    {
        var _gaq = _gaq || [];
        _gaq.push(['_setAccount', 'UA-xxxxxxxx-xx']);
        _gaq.push(['_trackPageview']);
        (function() {
            var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
            var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
        })();
    }
</script>

Encountering issues with postback functionality on an ASP.NET webpage while attempting to integrate Google

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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