更改视图在一个ASP.NET MVC过滤器 [英] Changing the view in an ASP.NET MVC Filter

问题描述

我想，如果他们使用的是手机浏览器将用户重定向到一个不同的看法。我已经决定，我想做到这一点使用MVC过滤器通过其应用到我想有一个移动视图操作。

我相信这重定向需要OnActionExecuted发生，但是filterContext不包含视图的信息 - 但它确实在OnResultExecuted，但这个时候，我相信这是来不及更改视图

我怎么能拦截视图名称和更改的ViewResult？

这是我在执行的结果，并希望我有行动的工作时执行。

 公共类MobilePageFilter：ActionFilterAttribute
{
    公共覆盖无效OnResultExecuted（ResultExecutedContext filterContext）
    {
        如果（filterContext.Result是的ViewResult）
        {
            如果（isMobileSite（filterContext.HttpContext.Session [SetMobile.SESSION_USE_MOBILE]））
            {
                的ViewResult的ViewResult =（的ViewResult）filterContext.Result;                字符串的viewName = viewResult.ViewName;
                filterContext.Result =新的ViewResult
                {
                    VIEWNAME =移动/+的viewName，
                    ViewData的= viewResult.ViewData，
                    TempData的= viewResult.TempData
                };
            }
        }        base.OnResultExecuted（filterContext）;
    }
}
 

解决方案

我会建议你以下博客文章这也解释了一个更好的选择，以达到你所要求的是什么，而不是使用动作过滤器。

I want to redirect the user to a different view if they are using a mobile browser. I've decided I'd like to do this using MVC filters by applying it to actions which I want to have a mobile view.

I believe this redirect needs to happen in OnActionExecuted, however the filterContext does not contain information on the view - it does, however in OnResultExecuted, but by this time I believe it is too late to change the view.

How can I intercept the view name and change the ViewResult?

This is what I have in the result executed and what I'd like to have work in Action Executed.

public class MobilePageFilter : ActionFilterAttribute
{
    public override void OnResultExecuted(ResultExecutedContext filterContext)
    {
        if(filterContext.Result is ViewResult)
        {
            if (isMobileSite(filterContext.HttpContext.Session[SetMobile.SESSION_USE_MOBILE]))
            {
                ViewResult viewResult = (ViewResult)filterContext.Result;

                string viewName = viewResult.ViewName;
                filterContext.Result = new ViewResult
                {
                    ViewName = "Mobile/" + viewName,
                    ViewData = viewResult.ViewData,
                    TempData = viewResult.TempData
                };
            }
        }

        base.OnResultExecuted(filterContext);
    }
}

解决方案

I would recommend you the following blog post which explains a better alternative to achieve what you are asking for rather than using action filters.

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