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POJSON error on submit in IE7 (and only IE7): "Cannot deserialize. The data does not correspond to valid JSON."
 

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  1. POJSON error on submit in IE7 (and only IE7): "Cannot deserialize. The data does not correspond to valid JSON."
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    <p>This is strictly an IE7 problem; IE8 doesn't mind, and neither does FF. Our form throws the following exception when submitting:</p> <pre><code>Sys.ArgumentException: Cannot deserialize. The data does not correspond to valid JSON. Parameter name: data </code></pre> <p>Form header (edited for secrecy; we have a paranoid NDA):</p> <pre><code>&lt;%using (Ajax.BeginForm("...", "...", FormMethod.Post, new AjaxOptions { OnComplete = "OnSaveEditCommunitySuccess", OnBegin = "OnBegin" }, new { id = "form_Edit...", name = "form_Edit..." })) </code></pre> <p>I temporarily attached a handler to OnBegin, and looked at the json object that gets passed around. I can guarantee <code>json.get_request().get_body()</code> is identical to what happens in FF, and properly web encoded:</p> <pre><code>ProfileTabModel.IsEdit=true&amp;ProfileTabModel.HandEnterCommunity=true&amp;ProfileTabModel.CommunityId=26&amp;ProfileTabModel.County=&amp;ProfileTabModel.OrgId=7395&amp; (...) </code></pre> <p>It might be relevant that this is a large form, and the data sent is at least 2500 bytes. I realize it shouldn't matter in a POSt, and even if it would, it has nothing to do with the reported error, but best mention it, since other forms written on the same pattern have no trouble posting their data.</p> <p>[EDIT:] When running on debug, IE7 doesn't enter the Action in the controller, while everything else does. Forgot to mention this.</p>
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    1. COCan you post the actual JSON?
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    2. COI'd love to find it, first. I mean, I can dig through the HTTP request just fine, and I can see it never enters the action method in the controller. But I don't even know what JSON it's talking about.
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    3. COYou could try to alter all the json calls to log what they are trying to encode and if it succeeds add a newline with 'succes' to it
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