test.cshtml

@using TXTextControl.Web.MVC

@Html.TXTextControl().TextControl().Render()

input type="button" onclick="doComplexFormatting()" value="Complex Formatting" />

<script>

    var connectionID;

    TXTextControl.addEventListener("textControlLoaded", function () {
        connectionID = TXTextControl.connectionID;
    });

    function doComplexFormatting() {

        TXTextControl.editMode = TXTextControl.EditMode.ReadOnly;

        $.ajax({
            url: '@Url.Action("DoComplexFormatting")',
            type: 'POST',
            data: { connectionID: connectionID },
            success: function (data) {
                TXTextControl.editMode = TXTextControl.EditMode.Edit;
            }
        });
    }
</script>