如何呈现一个ASP.. NET MVC ViewResult到HTML

Question

在测试情况下，我希望能够使用默认的viewEngine将给定的ViewResult呈现为HTML。

目前，我的视图是基于webforms的。但我可能会有Spark或Razor的观点。现在，我想关注WebForms。我可以从测试中呈现我的视图吗?

Answer 1

这里有一个方法可以让您将ViewResult呈现为字符串。在你的上下文中使用它的唯一棘手的部分是模拟一个可行的ControllerContext。

static string RenderPartialViewToString(ControllerContext context, ViewResultBase partialViewResult)
    {
        Require.ThatArgument(partialViewResult != null);
        Require.That(context != null);
        using (var sw = new StringWriter())
        {
            if (string.IsNullOrEmpty(partialViewResult.ViewName))
            {
                partialViewResult.ViewName = context.RouteData.GetRequiredString("action");
            }
            ViewEngineResult result = null;
            if (partialViewResult.View == null)
            {
                result = partialViewResult.ViewEngineCollection.FindPartialView(context, partialViewResult.ViewName);
                if(result.View == null)
                    throw new InvalidOperationException(
                                   "Unable to find view. Searched in: " +
                                   string.Join(",", result.SearchedLocations));
                partialViewResult.View = result.View;
            }
            var view = partialViewResult.View;
            var viewContext = new ViewContext(context, view, partialViewResult.ViewData,
                                              partialViewResult.TempData, sw);
            view.Render(viewContext, sw);
            if (result != null)
            {
                result.ViewEngine.ReleaseView(context, view);
            }
            return sw.ToString();
        }
    }