Question

基本上我们处于严重的hacky状态。我们有一些链接到其他网站的网页。但是，要求是此站点与链接到我们的站点具有相同的布局。这最初是通过请求原始页面，抓取布局以及在其布局中包装内容来完成的。

这在Web窗体中相当简单，因为我们可以简单地创建一个子类化的页面，它会覆盖Render方法，然后包装我们在外部站点布局中生成的任何内容。但是，现在这个项目正在ASP.NET MVC中重写。

我们怎样才能获得MVC动作创建的HTML结果，根据我们的需要修改它们并将修改后的结果输出到浏览器？

Answer 1

您可以使用ActionFilterAttribute.OnResultExecuted Method

您可以在此处查看有关ActionFilters的更多示例：

http://www.asp.net/mvc/tutorials/older-versions/controllers-and-routing/understanding-action-filters-cs

修改

关于这个主题有一篇很棒的博客文章：

http://weblogs.asp.net/imranbaloch/archive/2010/09/26/moving-asp-net-mvc-client-side-scripts-to-bottom.aspx

总结一下，你需要调整你的输出。据我所知，您需要使用RegEx来获取调整完整HTML所需的部分，您可以这样做：

这是助手类：

public class HelperClass : Stream { //Other Members are not included for brevity private System.IO.Stream Base; public HelperClass(System.IO.Stream ResponseStream) { if (ResponseStream == null) throw new ArgumentNullException("ResponseStream"); this.Base = ResponseStream; } StringBuilder s = new StringBuilder(); public override void Write(byte[] buffer, int offset, int count) { string HTML = Encoding.UTF8.GetString(buffer, offset, count); //In here you need to get the portion out of the full HTML //You can do that with RegEx as it is explain on the blog pots link I have given HTML += "<div style=\"color:red;\">Comes from OnResultExecuted method</div>"; buffer = System.Text.Encoding.UTF8.GetBytes(HTML); this.Base.Write(buffer, 0, buffer.Length); } }

这是你过滤的：

public class MyCustomAttribute : ActionFilterAttribute { public override void OnActionExecuted(ActionExecutedContext filterContext) { var response = filterContext.HttpContext.Response; if (response.ContentType == "text/html") { response.Filter = new HelperClass(response.Filter); } } }

您需要在Global.asax文件Application_Start方法上注册，如下所示：

protected void Application_Start() { //there are probably other codes here but I cut them out to stick with point here GlobalFilters.Filters.Add(new MyCustomAttribute()); }

Answer 2

在尝试了tugberk的解决方案之后，我最终创建了一个自定义视图结果：

 public class WrappedViewResult : ViewResult
    {
        private readonly object model;
        public WrapInDtuViewResult()
        {

        }

        public WrapInDtuViewResult(object model)
        {
            this.model = model;
        }


        public override void ExecuteResult(ControllerContext context)
        {

            if (string.IsNullOrWhiteSpace(this.ViewName))
            {
                this.ViewName = context.RouteData.Values["action"].ToString();
            }
            ViewEngineResult result = this.FindView(context);

            context.Controller.ViewData.Model = model;
            ViewDataDictionary viewData = context.Controller.ViewData;
            TempDataDictionary tempData = context.Controller.TempData;

            var writer = new StringWriter();
            ViewContext viewContext = new ViewContext(context, result.View, viewData, tempData, writer);
            result.View.Render(viewContext, writer);


            var content = writer.ToString();


            Scraping scraping = new Scraping();
            if (AppSettings.UseScraping)
            {
                content = scraping.Render(content);
            }
            else
            {
                content = "<html><head><script src='/Scripts/jquery-1.7.1.min.js' type='text/javascript'></script></head><body>" + content + "</body></html>";
            }

            context.HttpContext.Response.Write(content);
        }
    }

Answer 3

使用此博客：

http://blog.maartenballiauw.be/post/2008/06/Creating-an-ASPNET-MVC-OutputCache-ActionFilterAttribute.aspx

public class OutputCache : ActionFilterAttribute
{
public int Duration { get; set; }
public CachePolicy CachePolicy { get; set; }
public override void OnActionExecuted(ActionExecutedContext filterContext)
{
    // Client-side caching?
    if (CachePolicy == CachePolicy.Client || CachePolicy == CachePolicy.ClientAndServer)
    {
        if (Duration <= 0) return;
        HttpCachePolicyBase cache = filterContext.HttpContext.Response.Cache;
        TimeSpan cacheDuration = TimeSpan.FromSeconds(Duration);
        cache.SetCacheability(HttpCacheability.Public);
        cache.SetExpires(DateTime.Now.Add(cacheDuration));
        cache.SetMaxAge(cacheDuration);
        cache.AppendCacheExtension("must-revalidate, proxy-revalidate");
    }
}
}

包装/修改Html结果

3 个答案: