MVC4.0 利用IActionFilter实现单一Action返回多种结果
延续MVC4.0 实现单一Action返回多种结果，我们实现了在一个Action中根据前台请求方式的不同和请求内容的不同返回了多个结果，但是这种返回多个结果的业务逻辑并不通用。如果现在年纪Action也要实现这样的业务逻辑，怎么办？除了复制代码，索性MVC为我们提供了完美的机制，在多个控制器上重用统一的业务逻辑规则：IActionFilter拦截器。
1.定义一个多响应Result拦截器MultipleResponseResultFilter
/// <summary>
/// 多响应Result拦截器
/// </summary>
public class MultipleResponseResultFilter : FilterAttribute, IActionFilter
{
public string PartialViewName { get; set; }
/// <summary>
/// Action执行后
/// </summary>
void IActionFilter.OnActionExecuted(ActionExecutedContext filterContext)
{
var request = filterContext.HttpContext.Request;
var viewResult = filterContext.Result as ViewResult;
if (viewResult == null)
return;
if (request.IsPartialRequest())
{
filterContext.Result = new PartialViewResult
{
TempData = viewResult.TempData,
ViewData = viewResult.ViewData,
ViewName = PartialViewName,
};
}
if (request.IsJsonRequest())
{
filterContext.Result = new JsonResult
{
Data = viewResult.Model,
};
}
}
/// <summary>
/// Action执行前
/// </summary>
void IActionFilter.OnActionExecuting(ActionExecutingContext filterContext)
{
}
}
2.Action调用实现（局部视图PartialViewName为必须值）
[MultipleResponseResultFilter(PartialViewName="PartialStudent")]
public ActionResult Student()
{
return View(new { Name = "小明", Sex = "女" });
}
3.Html调用代码如下：
<body>
<h3>view视图</h3>
<div>我是小明</div>
<h3>PartialView视图：</h3>
<div id="partial"></div>
<h3>Json数据：</h3>
<div id="json"></div>
<script src="~/Content/js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
$(function () {
$('#partial').load('@Url.Action("Student", "Home", new { area=string.Empty, format="partial" })');
$.post('@Url.Action("Student", "Home")', { format: 'json' }, function (res) {
if (res) {
$('#json').html(res.Name);
}
}, 'json')
})
</script>
</body>
