asp.net-mvc – asp.net mvc ajax post – redirecttoaction无效

if (Request.IsAjaxRequest()) {
            return RedirectToAction("PreviewAndSendEmail");
        }

我调试它,它返回到行,但没有发生重定向.是否可以在Ajax.BeginForm中执行此操作？这是剃刀代码;

using(Ajax.BeginForm( new AjaxOptions { LoadingElementId = "loading" })) { 

    <b>Choose E-mail Template : </b>@Html.DropDownList("emailtemps")<br /><br />

    <input type="submit" value="Preview & Send" />

    <span id="loading" style="display: none;">
        <img title="loading..." alt="load" src="@Url.Content("~/Content/App_Icons/gifs/loading.gif")"
    </span>

}