通过ajax发布html代码[重复]

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                    <div class="grid--cell mb0 mt4">
                        <a href="/questions/4759681/post-html-tag-codes-as-string-with-asp-net-mvc-jquery" dir="ltr">Post HTML tag (codes) as string with ASP.net MVC &amp; JQuery</a>
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                                (3 answers)
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            <div class="grid--cell mb0 mt8">Closed <span title="2017-04-17 08:16:53Z" class="relativetime">3 years ago</span>.</div>
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    </aside>

So Im using TinyMCE editor and I need to post html code created.

$(".saveButton").click(function () {
var url = $(this).data('url');
var HTMLCode = tinyMCE.activeEditor.getContent();
$.ajax({
    url: url,
    method: 'POST',
    data: { HTMLCode : HTMLCode },
    success: function (data) {
       //do something
    },
    error: function () {
        toastr.error('Something went wrong.');
    }
});

Im ofcourse getting 500 error because HTMLCode looks like this -

"<span class="someclass">test</span>"

Do you have any idea how to solve this ?

Serverside code

 [HttpPost]
    public JsonResult SaveHTML(string HTMLCode)
    {
        //save HTMLCode to db            
        return Json(new { retVal = "success" });           
    }

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