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I have the following function in JavaScript, using which I call a PageMethod in ASP.Net.

The trouble is when I pass a string like xy\23 or 2% for the parameter searchStringVal, then I get a JavaScript error. Anyway I can handle this sort of problem? This parameter is finally passed to a static server-side method in my ASP.Net page, and this further compounds this problem. So I am looking for the most efficient approach to use in this situation.

One solution could be to encode strings in JavaScript, but I need to be able to decode it in ASP.Net C# code, without losing the original value of string.

function CallPageMethod(startRowIndex, searchStringVal) {        
    if (newVal != searchStringVal) {
        //document.getElementById('divMessage').style.visibility = "hidden";
        return;
    }

    start = new Date();
    PageMethods.GetData(startRowIndex, tableView.get_pageSize(), searchStringVal, updateGrid, onError, searchStringVal);
}

LATEST UPDATE: My question was answered by two different persons. How can I label both as answers? I ended up using Vinay's recommended approach of encoding in Javascript and then unecoding in C# using Uri.UnescapeDataString method.

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  • Its a javascript error with a yellow exclamation that appears at bottom left of the browser window and when I click it says 'Unterminated String Constant'. I specified a value of 2xy\ Commented Aug 18, 2012 at 6:51
  • Sunil [Refer This Link][1] Hope You are Looking for this. [1]: stackoverflow.com/questions/4613430/… Commented Aug 18, 2012 at 7:01

1 Answer 1

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If you're getting an unterminated string constant, then it has to do with how you're entering the string.

Typing "2xy\" is interpreted as a 2xy, and then an escaped double-quote. The string is then underminated.

Try "2xy\\" to enter the string 2xy\ - this uses the backslash to escape the second backslash, and will be recognized as the string you're trying to enter.

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9 Comments

How would I take care of something like 2%, as that also gives a javascript error.
What error does that give? "2%" shouldn't give an unterminated string constant error.
I cannot see a javascript error but there seems to be some error as the page is not responding. This is when I input 2%.
Sorry - I don't think I'll be able to help track the 2% one down unless you have some more information about what's going on. Maybe try putting a breakpoint there, and stepping through to see what's happening?
Yes I will try and let you know later. Thanks for now for your prompt help.
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