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POASP.NET & Ajax: query string parameters using ISO-8859-1 encoding
 

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    <p>Here's another one for you to help me solve: I have an ASP.NET website that uses AJAX (asynchronous) calls to am <code>.ashx</code> handler, passing a <em>query string</em> parameter to get some information from the database.</p> <p>Here's an example of how it works:</p> <p><em>Client-side</em> (Javascript) <em>code snippet</em> that makes the asynchronous call to the handler:</p> <pre><code>/* Capture selected value from a DropDownBox */ var dropdown = document.getElementById(DropDownID); var selectedValue = dropdown.options[dropdown.selectedIndex].value; /* Make the call to the handler */ var url = "MyHandler.ashx?param=" + selectedValue; var ajaxObj = new Ajax(); ajaxObj.doRequest(url, MyCallback, args, connectionFailed); </code></pre> <p>When I load the <code>webform</code> (that contains this AJAX call) for the first time, it sends the right query string to the handler (I checked it using debug in Visual Studio), like <code>param = Street Joseph Blíss</code>. That's the right behavior I want it to have.</p> <p>The thing is that when I load that <code>webform</code> again (and all subsequent times), that <code>í</code> character from "Blíss" appears in server-side as <code>í-</code>. As that's the key from the entity I'm trying to select on server-side database access script, it doesn't work as it worked on 1st <code>webform</code> load.</p> <p>I tried encoding the <em>query string</em> on <em>client-side</em> and decoding it on <em>server-side</em>, using something like this:</p> <p><em>Client-side</em> (Javascript):</p> <pre><code>var encodedParam = encodeURIComponent(selectedValue); /* Make the call to the handler */ var url = "MyHandler.ashx?param=" + encodedParam ; </code></pre> <p><em>Server-side</em> (ASP.NET, C#):</p> <pre><code>string encodedParam = context.Request.QueryString["param"]; string value = HttpUtility.UrlDecode(encodedParam, Encoding.ASCII); </code></pre> <p>...but I had no luck with it and the problem still remains. Any help?</p>
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