如何将JSON结果返回给Ajax.BeginForm ?

I have got this simple form:

我有一个简单的表格:

@using (Ajax.BeginForm("CreateProductFromAjaxForm","Product" , 
                  null, 
                  new AjaxOptions() {  HttpMethod = "post", OnSuccess = "getresult" },
                  null))
{
    @Html.EditorFor(m => m)
    <hr />
    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" class="btn btn-info" value="Next" />
        </div>
    </div>
}  
@us