C# ViewContext类代码示例

        public IEnumerable<MvcSiteMapNode> GetBreadcrumb(ViewContext context)
        {
            String area = context.RouteData.Values["area"] as String;
            String action = context.RouteData.Values["action"] as String;
            String controller = context.RouteData.Values["controller"] as String;

            MvcSiteMapNode current = NodeList.SingleOrDefault(node =>
                String.Equals(node.Area, area, StringComparison.OrdinalIgnoreCase) &&
                String.Equals(node.Action, action, StringComparison.OrdinalIgnoreCase) &&
                String.Equals(node.Controller, controller, StringComparison.OrdinalIgnoreCase));

            List<MvcSiteMapNode> breadcrumb = new List<MvcSiteMapNode>();
            while (current != null)
            {
                breadcrumb.Insert(0, new MvcSiteMapNode
                {
                    IconClass = current.IconClass,

                    Controller = current.Controller,
                    Action = current.Action,
                    Area = current.Area
                });

                current = current.Parent;
            }

            return breadcrumb;
        }

        public ChildActionExtensionsTest()
        {
            route = new Mock<RouteBase>();
            route.Setup(r => r.GetVirtualPath(It.IsAny<RequestContext>(), It.IsAny<RouteValueDictionary>()))
                .Returns(() => virtualPathData);

            virtualPathData = new VirtualPathData(route.Object, "~/VirtualPath");

            routes = new RouteCollection();
            routes.Add(route.Object);

            originalRouteData = new RouteData();

            string returnValue = "";
            httpContext = new Mock<HttpContextBase>();
            httpContext.Setup(hc => hc.Request.ApplicationPath).Returns("~");
            httpContext.Setup(hc => hc.Response.ApplyAppPathModifier(It.IsAny<string>()))
                .Callback<string>(s => returnValue = s)
                .Returns(() => returnValue);
            httpContext.Setup(hc => hc.Server.Execute(It.IsAny<IHttpHandler>(), It.IsAny<TextWriter>(), It.IsAny<bool>()));

            viewContext = new ViewContext
            {
                RequestContext = new RequestContext(httpContext.Object, originalRouteData)
            };

            viewDataContainer = new Mock<IViewDataContainer>();

            htmlHelper = new Mock<HtmlHelper>(viewContext, viewDataContainer.Object, routes);
        }

 protected string RenderPartialViewToString(string viewName, object model)
 {
     if (string.IsNullOrEmpty(viewName))
     {
         viewName = ControllerContext.ActionDescriptor.ActionName;
     }
     ViewData.Model = model;
     using (StringWriter sw = new StringWriter())
     {
         var engine = _serviceProvider.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
         // Resolver.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
         ViewEngineResult viewResult = engine.FindView(ControllerContext, viewName, false);
         ViewContext viewContext = new ViewContext(
                               ControllerContext,
                               viewResult.View,
                               ViewData,
                               TempData,
                               sw,
                               new HtmlHelperOptions() //Added this parameter in
                               );
         //Everything is async now!
         var t = viewResult.View.RenderAsync(viewContext);
         t.Wait();
         return sw.GetStringBuilder().ToString();
     }
 }

        public void PropertiesAreSet()
        {
            // Arrange
            var mockControllerContext = new Mock<ControllerContext>();
            mockControllerContext.Setup(o => o.HttpContext.Items).Returns(new Hashtable());
            var view = new Mock<IView>().Object;
            var viewData = new ViewDataDictionary();
            var tempData = new TempDataDictionary();
            var writer = new StringWriter();

            // Act
            ViewContext viewContext = new ViewContext(mockControllerContext.Object, view, viewData, tempData, writer);

            // Setting FormContext to null will return the default one later
            viewContext.FormContext = null;

            // Assert
            Assert.Equal(view, viewContext.View);
            Assert.Equal(viewData, viewContext.ViewData);
            Assert.Equal(tempData, viewContext.TempData);
            Assert.Equal(writer, viewContext.Writer);
            Assert.False(viewContext.UnobtrusiveJavaScriptEnabled); // Unobtrusive JavaScript should be off by default
            Assert.NotNull(viewContext.FormContext); // We get the default FormContext
            Assert.Equal("span", viewContext.ValidationSummaryMessageElement); // gen a <span/> by default
            Assert.Equal("span", viewContext.ValidationMessageElement); // gen a <span/> by default
        }

        /// <inheritdoc />
        public async Task ExecuteAsync(WidgetContext context)
        {
            var viewEngine = ViewEngine ?? ResolveViewEngine(context);
            var viewData = ViewData ?? context.ViewData;
            bool isNullOrEmptyViewName = string.IsNullOrEmpty(ViewName);

            string state = null; // TODO: Resolve from value provider?

            string qualifiedViewName;
            if (!isNullOrEmptyViewName && (ViewName[0] == '~' || ViewName[0] == '/'))
            {
                qualifiedViewName = ViewName;
            }
            else
            {
                qualifiedViewName = string.Format(ViewPath, context.WidgetDescriptor.ShortName, isNullOrEmptyViewName ? (state ?? DefaultViewName) : ViewName);
            }

            var view = FindView(context.ViewContext, viewEngine, qualifiedViewName);
            var childViewContext = new ViewContext(
                context.ViewContext,
                view,
                viewData,
                context.Writer);

            using (view as IDisposable)
            {
                await view.RenderAsync(childViewContext);
            }
        }

 private string DefaultForContext(ViewContext context)
 {
     if (context == ViewContext.Edit)
         return Catalog.GetString ("Edit");
     // Don't care otherwise, Tags sounds reasonable
     return Catalog.GetString ("Tags");
 }

		private void RenderViewUserControl(ViewContext context, 
			TextWriter writer, ViewUserControl control)
		{
			control.ViewData = context.ViewData;
			control.Output = writer;
			control.RenderView(context);
		}

		public override void RenderView(ViewContext viewContext)
		{
			var prevHandler = this.Context.Handler;
			var isOnAspx = prevHandler is Page;

			this.Controls.Add(new Placeholder() { Key = key });
			if (!isOnAspx)
			{
				this.Controls.Add(new SitecoreForm());
			}
			using (var containerPage = new PageHolderContainerPage(this))
			{
				try
				{
					if (!isOnAspx)
						this.Context.Handler = containerPage;
					if (global::Sitecore.Context.Page == null)
					{
						viewContext.Writer.WriteLine("<!-- Unable to use sitecoreplacholder outside sitecore -->");
						return;
					}
					InitializePageContext(containerPage, viewContext);
					RenderViewAndRestoreContentType(containerPage, viewContext);
				}
				finally
				{
					this.Context.Handler = prevHandler;
				}
			}
		}

		internal static void InitializePageContext(Page containerPage, ViewContext viewContext)
		{

			PageContext pageContext = global::Sitecore.Context.Page;
			if (pageContext == null)
				return;

			var exists = pageContext.Renderings != null && pageContext.Renderings.Count > 0;
			if (!exists)
			{
				//use the default initializer:
				pageContextInitializer.Invoke(pageContext, null);
				//viewContext.HttpContext.Items["_SITECORE_PLACEHOLDER_AVAILABLE"] = true;
			}
			else
			{
				//our own initializer (almost same as Initialize in PageContext, but we need to skip buildcontroltree, since that is already availabe)
				pageContext_page.SetValue(pageContext, containerPage);
				containerPage.PreRender += (sender, args) => pageContextOnPreRender.Invoke(pageContext, new[] {sender, args});
				switch (Settings.LayoutPageEvent)
				{
					case "preInit":
						containerPage.PreInit += (o, args) => pageContext.Build();
						break;
					case "init":
						containerPage.Init += (o, args) => pageContext.Build();
						break;
					case "load":
						containerPage.Load += (o, args) => pageContext.Build();
						break;
				}
			}
		}

        /// <summary>
        /// Asynchronously renders the specified <paramref name="view"/> to the response body.
        /// </summary>
        /// <param name="view">The <see cref="IView"/> to render.</param>
        /// <param name="actionContext">The <see cref="ActionContext"/> for the current executing action.</param>
        /// <param name="viewData">The <see cref="ViewDataDictionary"/> for the view being rendered.</param>
        /// <param name="tempData">The <see cref="ITempDataDictionary"/> for the view being rendered.</param>
        /// <returns>A <see cref="Task"/> that represents the asynchronous rendering.</returns>
        public static async Task ExecuteAsync([NotNull] IView view,
                                              [NotNull] ActionContext actionContext,
                                              [NotNull] ViewDataDictionary viewData,
                                              [NotNull] ITempDataDictionary tempData,
                                              [NotNull] HtmlHelperOptions htmlHelperOptions,
                                              MediaTypeHeaderValue contentType)
        {
            var response = actionContext.HttpContext.Response;

            contentType = contentType ?? DefaultContentType;
            if (contentType.Encoding == null)
            {
                // Do not modify the user supplied content type, so copy it instead
                contentType = contentType.Copy();
                contentType.Encoding = Encoding.UTF8;
            }

            response.ContentType = contentType.ToString();

            using (var writer = new HttpResponseStreamWriter(response.Body, contentType.Encoding))
            {
                var viewContext = new ViewContext(
                    actionContext,
                    view,
                    viewData,
                    tempData,
                    writer,
                    htmlHelperOptions);

                await view.RenderAsync(viewContext);
            }
        }

 public UnobtrusiveFormContext(ViewContext context, string formId)
 {
     _context = context;
     _context.ClientValidationEnabled = true;
     _context.UnobtrusiveJavaScriptEnabled = true;
     _context.FormContext = new FormContext { FormId = formId };
 }

        public void ViewLocalizer_UseIndexer_ReturnsLocalizedHtmlString()
        {
            // Arrange
            var hostingEnvironment = new Mock<IHostingEnvironment>();
            hostingEnvironment.Setup(a => a.ApplicationName).Returns("TestApplication");

            var localizedString = new LocalizedHtmlString("Hello", "Bonjour");

            var htmlLocalizer = new Mock<IHtmlLocalizer>();
            htmlLocalizer.Setup(h => h["Hello"]).Returns(localizedString);

            var htmlLocalizerFactory = new Mock<IHtmlLocalizerFactory>();
            htmlLocalizerFactory.Setup(h => h.Create("TestApplication.example", "TestApplication"))
                .Returns(htmlLocalizer.Object);

            var viewLocalizer = new ViewLocalizer(htmlLocalizerFactory.Object, hostingEnvironment.Object);

            var view = new Mock<IView>();
            view.Setup(v => v.Path).Returns("example");
            var viewContext = new ViewContext();
            viewContext.View = view.Object;

            viewLocalizer.Contextualize(viewContext);

            // Act
            var actualLocalizedString = viewLocalizer["Hello"];

            // Assert
            Assert.Equal(localizedString, actualLocalizedString);
        }

 public dynamic CreateHelper(ViewContext viewContext)
 {
     return new DisplayHelper(
         _displayManager,
         _shapeFactory,
         viewContext);
 }

    /// <summary>
    /// Renders the specified partial view to a string.
    /// </summary>
    /// <param name="viewName">The name of the partial view.</param>
    /// <param name="model">The model.</param>
    /// <returns>The partial view as a string.</returns>
    protected string RenderPartialViewToString(string viewName, object model)
    {
        if (string.IsNullOrEmpty(viewName))
        {
            viewName = ControllerContext.RouteData.GetRequiredString("action");
        }

        ViewData.Model = model;

        using (var sw = new StringWriter())
        {
            // Find the partial view by its name and the current controller context.
            ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName);

            if (viewResult.View == null)
            {
              throw new ArgumentException(string.Format("Could not find the view with the specified name '{0}'.", viewName), "viewName");
            }

            // Create a view context.
            var viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw);

            // Render the view using the StringWriter object.
            viewResult.View.Render(viewContext, sw);

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

 public Control AddTo(Control container, ViewContext context)
 {
     Literal l = new Literal();
     l.Text = context.Fragment.Value.Substring(1, context.Fragment.Value.Length - 2);
     container.Controls.Add(l);
     return l;
 }