C# BindingBuilder類代碼示例

		private void ReadName(XElement element, BindingBuilder<object> builder)
		{
			var nameAttribute = element.Attribute("name");

			if (nameAttribute != null)
				builder.Named(nameAttribute.Value);
		}

		private void ReadScope(XElement element, BindingBuilder<object> builder)
		{
			XAttribute scopeAttribute = element.Attribute("scope");

			if (scopeAttribute == null || String.IsNullOrEmpty(scopeAttribute.Value))
			{
				builder.InTransientScope();
				return;
			}

			string value = scopeAttribute.Value.ToLower();

			switch (value)
			{
				case "transient":
					builder.InTransientScope();
					break;

				case "singleton":
					builder.InSingletonScope();
					break;

				case "thread":
					builder.InThreadScope();
					break;

				case "request":
					builder.InRequestScope();
					break;

				default:
					throw new ConfigurationErrorsException(String.Format("The 'bind' element has an unknown value '{0}' for its 'scope' attribute. Valid values are transient, singleton, thread, and request.", value));
			}
		}

		private void ReadMetadata(XElement element, BindingBuilder<object> builder)
		{
			foreach (XElement metadataElement in element.Elements("metadata"))
			{
				XAttribute keyAttribute = metadataElement.RequiredAttribute("key");
				XAttribute valueAttribute = metadataElement.RequiredAttribute("value");

				builder.WithMetadata(keyAttribute.Value, valueAttribute.Value);
			}
		}

        public void BuilderShouldUseTargetBindingContextForSource4()
        {
            const string sourcePath = "IntProperty";
            var targetObj = new BindingSourceEventNotifierModel();
            var builder = new BindingBuilder();
            builder.Bind(targetObj, () => model => model.ObjectProperty).To<BindingSourceModel>(() => model => model.IntProperty);

            IList<Func<IDataContext, IBindingSource>> sources = builder.GetData(BindingBuilderConstants.Sources);
            IBindingSource source = sources.Single().Invoke(builder);
            BindingParserTest.BindingSourceShouldBeValidDataContext(targetObj, source, sourcePath);
            var sourceObj = new BindingSourceModel();
            BindingServiceProvider.ContextManager.GetBindingContext(targetObj).Value = sourceObj;
            BindingParserTest.BindingSourceShouldBeValidDataContext(targetObj, source, sourcePath);
        }

        public void BuilderShouldUseTargetBindingContextForSource2()
        {
            const string targetPath = "Text";
            const string sourcePath = "IntProperty";
            var targetObj = new object();
            var builder = new BindingBuilder();
            builder.Bind(targetObj, targetPath).To<BindingSourceModel>(() => (model, ctx) => model.IntProperty);

            IList<Func<IDataContext, IObserver>> sources = builder.GetData(BindingBuilderConstants.Sources);
            IObserver source = sources.Single().Invoke(builder);
            BindingParserTest.BindingSourceShouldBeValidDataContext(targetObj, source, sourcePath);
            var sourceObj = new BindingSourceModel();
            BindingServiceProvider.ContextManager.GetBindingContext(targetObj).Value = sourceObj;
            BindingParserTest.BindingSourceShouldBeValidDataContext(targetObj, source, sourcePath);
        }

        public void ParserShouldParseSingleExpression1()
        {
            const string targetPath = "Text";
            const string sourcePath = "SourceText";
            const string binding = "Text SourceText";
            var target = new object();
            IBindingParser bindingParser = CreateBindingParser();

            var context = new BindingBuilder(bindingParser.Parse(target, binding, null, null).Single());
            IBindingPath path = context.GetData(BindingBuilderConstants.TargetPath);
            path.Path.ShouldEqual(targetPath);

            var sources = context.GetData(BindingBuilderConstants.Sources);
            IObserver source = sources.Single().Invoke(context);
            BindingSourceShouldBeValidDataContext(target, source, sourcePath);
        }

        public void ParserShouldParseSingleExpression2()
        {
            const string targetPath = "Text";
            const string sourcePath = "SourceText";
            const string binding = "Text $context.SourceText";
            var target = new object();
            IBindingParser bindingParser = CreateBindingParser();

            var context = new BindingBuilder(bindingParser.Parse(binding, EmptyContext, target, null).Single());
            IBindingPath path = context.GetData(BindingBuilderConstants.TargetPath);
            path.Path.ShouldEqual(targetPath);

            var sources = context.GetData(BindingBuilderConstants.Sources);
            IBindingSource source = sources.Single().Invoke(context);
            BindingSourceShouldBeValid(source, AttachedMemberConstants.DataContext + "." + sourcePath, target);
        }

	    public void Handle(XmlModule module, XElement element)
		{
			XAttribute serviceAttribute = element.RequiredAttribute("service");

			Type service = GetTypeFromAttributeValue(serviceAttribute);

			var binding = new Binding(service);
			var builder = new BindingBuilder<object>(binding, _kernel);

			module.AddBinding(binding);

			if (!HandleTarget(element, builder))
				throw new ConfigurationErrorsException("The 'bind' element does not define either a 'to' or 'toProvider' attribute.");

			ReadName(element, builder);
			ReadMetadata(element, builder);
			ReadScope(element, builder);
		}

        public void ParserShouldUseTargetBindingContextForSource()
        {
            const string targetPath = "Text";
            const string sourcePath = "IntProperty";
            const string binding = "Text IntProperty";
            var target = new object();
            IBindingParser bindingParser = CreateBindingParser();

            var context = new BindingBuilder(bindingParser.Parse(binding, EmptyContext, target, null).Single());
            IBindingPath path = context.GetData(BindingBuilderConstants.TargetPath);
            path.Path.ShouldEqual(targetPath);

            var sources = context.GetData(BindingBuilderConstants.Sources);
            IBindingSource source = sources.Single().Invoke(context);
            BindingSourceShouldBeValidDataContext(target, source, sourcePath);
            var sourceObj = new BindingSourceModel();
            BindingServiceProvider.ContextManager.GetBindingContext(target).Value = sourceObj;
            BindingSourceShouldBeValidDataContext(target, source, sourcePath);
        }

        public void BuilderShouldUseElementSource2()
        {
            const string name = "name";
            var builder = new BindingBuilder();
            var targetObj = new BindingSourceModel { ObjectProperty = "test" };
            var relativeObj = new BindingSourceModel();
            bool isInvoked = false;
            IEventListener eventListener = null;
            var memberMock = new BindingMemberInfoMock
            {
                TryObserveMember = (o, listener) =>
                {
                    eventListener = listener;
                    return null;
                }
            };

            var treeManagerMock = new VisualTreeManagerMock
            {
                FindByName = (o, s) =>
                {
                    o.ShouldEqual(targetObj);
                    s.ShouldEqual(name);
                    isInvoked = true;
                    return relativeObj;
                },
                GetRootMember = type => memberMock
            };
            BindingServiceProvider.VisualTreeManager = treeManagerMock;

            builder.Bind(targetObj, "empty").To<BindingSourceModel>(() => model => BindingSyntaxEx.Element<BindingSourceModel>(name).ObjectProperty);
            var source = builder.GetData(BindingBuilderConstants.Sources).Single().Invoke(builder);
            builder.GetData(BindingBuilderConstants.MultiExpression).ShouldBeNull();
            source.Path.Path.ShouldEqual(GetMemberPath(targetObj, model => model.ObjectProperty));
            source.GetSource(true).ShouldEqual(relativeObj);
            var pathMembers = source.GetPathMembers(true);
            pathMembers.LastMember.GetValue(pathMembers.PenultimateValue, null).ShouldEqual(relativeObj.ObjectProperty);
            isInvoked.ShouldBeTrue();

            isInvoked = false;
            eventListener.ShouldNotBeNull();
            eventListener.Handle(this, EventArgs.Empty);
            isInvoked.ShouldBeTrue();
        }

 public void BuilderShouldUseTargetNullValue()
 {
     var nullValue = new object();
     var builder = new BindingBuilder();
     builder.Bind(new object(), "test").To("test").WithTargetNullValue(nullValue);
     builder.GetData(BindingBuilderConstants.TargetNullValue).ShouldEqual(nullValue);
 }

        public void BuilderShouldUseGetErrorsMethod3()
        {
            var builder = new BindingBuilder();
            var sourceModel = new BindingSourceModel();
            builder.Bind(sourceModel, "empty").To(sourceModel, () => model => BindingSyntaxEx.GetErrors("1", "2", model.ObjectProperty));

            var source = builder.GetData(BindingBuilderConstants.Sources).Single().Invoke(builder);
            source.Path.Path.ShouldEqual(GetMemberPath(sourceModel, model => model.ObjectProperty));
            source.GetSource(true).ShouldEqual(sourceModel);

            var behavior = builder.GetOrAddBehaviors().OfType<NotifyDataErrorsAggregatorBehavior>().Single();
            behavior.ErrorPaths.SequenceEqual(new[] { "1", "2" }).ShouldBeTrue();
            builder.AddOrUpdate(BindingConstants.Binding, new DataBindingMock { Behaviors = new[] { behavior } });

            var expression = builder.GetData(BindingBuilderConstants.MultiExpression);
            behavior.Errors = new List<object> { "test" };
            expression(builder, new object[] { sourceModel }).ShouldEqual(behavior.Errors);
        }

        public void BuilderShouldUseGetErrorsMethod4()
        {
            var builder = new BindingBuilder();
            var sourceModel = new BindingSourceModel();
            builder.Bind(sourceModel, "empty").To(sourceModel, () => model => BindingSyntaxEx.GetErrors("1", "2").Concat(BindingSyntaxEx.GetErrors(model.ObjectProperty)));


            var sources = builder.GetData(BindingBuilderConstants.Sources).Select(func => func(builder)).ToArray();
            sources[0].GetSource(true).ShouldEqual(sourceModel);
            sources[1].GetSource(true).ShouldEqual(sourceModel);
            if (sources[0].Path.IsEmpty)
                sources[1].Path.Path.ShouldEqual(GetMemberPath(sourceModel, model => model.ObjectProperty));
            else
                sources[0].Path.Path.ShouldEqual(GetMemberPath(sourceModel, model => model.ObjectProperty));

            var behaviors = builder.GetOrAddBehaviors().OfType<NotifyDataErrorsAggregatorBehavior>().ToArray();
            builder.AddOrUpdate(BindingConstants.Binding, new DataBindingMock { Behaviors = behaviors });
            var behavior = behaviors.Single(b => !b.ErrorPaths.IsNullOrEmpty());
            behavior.ErrorPaths.SequenceEqual(new[] { "1", "2" }).ShouldBeTrue();

            behaviors.ForEach(aggregatorBehavior => aggregatorBehavior.Errors = new[] { "1" });
            var expression = builder.GetData(BindingBuilderConstants.MultiExpression);
            var errors = (IEnumerable<object>)expression(builder, new object[] { sourceModel, sourceModel });
            errors.SequenceEqual(behaviors[0].Errors.Concat(behaviors[1].Errors)).ShouldBeTrue();
        }

        public void BuilderShouldUseSelfExpression1()
        {
            var builder = new BindingBuilder();
            var sourceModel = new BindingSourceModel();
            builder.Bind(sourceModel, "empty").To<BindingSourceModel>(() => model => BindingSyntaxEx.Self<BindingSourceModel>());

            var source = builder.GetData(BindingBuilderConstants.Sources).Single().Invoke(builder);
            builder.GetData(BindingBuilderConstants.MultiExpression).ShouldBeNull();
            source.Path.IsEmpty.ShouldBeTrue();
            source.GetSource(true).ShouldEqual(sourceModel);
            var pathMembers = source.GetPathMembers(true);
            pathMembers.LastMember.GetValue(pathMembers.PenultimateValue, null).ShouldEqual(sourceModel);
        }

        public void BuilderShouldUseResource2()
        {
            const string key = "key";
            var builder = new BindingBuilder();
            var sourceModel = new BindingSourceModel { ObjectProperty = "test" };
            BindingServiceProvider.ResourceResolver.AddObject(key, sourceModel);
            builder.Bind(sourceModel, "empty").To<BindingSourceModel>(() => model => BindingSyntaxEx.Self<BindingSourceModel>().ObjectProperty);

            var source = builder.GetData(BindingBuilderConstants.Sources).Single().Invoke(builder);
            builder.GetData(BindingBuilderConstants.MultiExpression).ShouldBeNull();
            source.Path.Path.ShouldEqual(GetMemberPath(sourceModel, model => model.ObjectProperty));
            source.GetSource(true).ShouldEqual(sourceModel);
            var pathMembers = source.GetPathMembers(true);
            pathMembers.LastMember.GetValue(pathMembers.PenultimateValue, null).ShouldEqual(sourceModel.ObjectProperty);
        }