asp.net mvc5 cs代码中获取视图生成后的HTML

public static class ViewExtensions { /// <summary> /// 在控制器内获取指定视图生成后的HTML /// </summary> /// <param name="context">当前控制器的上下文</param> /// <param name="viewName">视图名称</param> /// <param name="model">视图所需要的参数</param> /// <returns>视图生成的HTML</returns> public static string GetViewHtml(this ControllerContext context, string viewName, Object param) { if (string.IsNullOrEmpty(viewName)) viewName = context.RouteData.GetRequiredString("action");

        context.Controller.ViewData.Model=param;

        using (var sw = new StringWriter())
        {
            ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(context, viewName);
            var viewContext = new ViewContext(context,
                                              viewResult.View,
                                              context.Controller.ViewData,
                                              context.Controller.TempData,
                                              sw);
            try
            {
                viewResult.View.Render(viewContext, sw);
            }
            catch (Exception ex)
            {
                throw;
            }

            return sw.GetStringBuilder().ToString();
        }
    }
}