KindEditor

@model XXModel
....
@Html.EditorFor(model => model.Content)
....
<script type="text/javascript">
    $(document).ready(function () {
        KindEditor.ready(function (K) {
            window.editor = K.create('#id', //
            {
                uploadJson: 'Url',//上传，注意返回格式
                afterBlur: function () { editor.sync(); } //添加这句话就不会传空值
            });
        });
    });
</script>

//后台
 [HttpPost]
 [ValidateInput(false)]
 public ActionResult Edit(XXModel model)
{ 
　　// model.Content 这个即可获取到
}

//成功时
{
        "error" : 0,
        "url" : "http://www.example.com/path/to/file.ext"
}
//失败时
{
        "error" : 1,
        "message" : "错误信息"
}