Having trouble with AutoCompleteExtender OnClientItemSelected not functioning in IE8 but working perfectly in IE9? Let's dive into the JavaScript substring

My AutoCompleteExtender is connected to a web service and works perfectly. The Target TextBox (tb_provider1) has autocomplete capabilities thanks to the GetProviders function. What I want to achieve is triggering a javascript function when a user selects an option from the autocomplete list of the TextBox (tb_provider1). I have utilized OnClientItemSelected and everything works fine in IE9. Below is the ASPX code snippet:

<asp:AutoCompleteExtender ID="AutoComplete1" 
runat="server" ServiceMethod="GetProviders" 
ServicePath="AutoCompleteWebService.asmx" OnClientItemSelected="ProviderSelectedFunc"
TargetControlID="tb_provider1" CompletionSetCount="20" 
CompletionInterval="250" CompletionListCssClass="CompletionListCssClass" 
CompletionListItemCssClass="CompletionListItemCssClass" 
CompletionListHighlightedItemCssClass="CompletionListHighlightedItemCssClass">

Here is the javascript function:

function ProviderSelectedFunc(sender, args) {
        //here I know I am sending in tb_enrollingProvider1
        var temp = sender._id.toString();
        if (temp.substr(-14,13))
            alert("Testing");
    }

The alert fires in IE9 but not in IE7 or IE8. Need help with this issue.

Answer №1

Discovering the ability to switch browser mode in IE9 by pressing F12 was a game-changer for me. It led me to identify discrepancies in the javascript behavior between IE8 and IE9, specifically related to the substr method. Thanks to using breakpoints and debugging with F12 in IE, I was able to pinpoint the issue: my method call was failing due to incorrect usage of the "substr" instead of "substring." This experience highlighted the importance of thorough testing and attention to detail when working on web development projects.

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