public void BindAttachedProperty2() { var viewModel = new TestViewModel(); using(var button = new Button()) { button.SetValue(TextProperty, "button1"); button.SetDataContext(viewModel); button.SetBinding(() => new Button().Text, new Binding(() => new TestViewModel().StringProperty2)); button.SetBinding(TextProperty, new Binding(() => new TestViewModel().StringProperty)); Assert.That(button.GetValue(TextProperty), Is.EqualTo(null)); Assert.That(button.Text, Is.EqualTo(string.Empty)); viewModel.StringProperty = "test"; Assert.That(button.GetValue(TextProperty), Is.EqualTo("test")); Assert.That(button.Text, Is.EqualTo(string.Empty)); viewModel.StringProperty2 = "test2"; Assert.That(button.GetValue(TextProperty), Is.EqualTo("test")); Assert.That(button.Text, Is.EqualTo("test2")); button.ClearBinding(TextProperty); Assert.That(button.GetValue(TextProperty), Is.Null); } }
public void TwoWayBindingForAttachedProperty() { var viewModel = new TestViewModel() { }; using(var button = new Button()) { button.SetDataContext(viewModel); PropertyEntry<object> entry = CommandProvider.CommandParameterProperty.GetPropertyEntry(button); Assert.That(entry.ChangedSubscribeCount, Is.EqualTo(0)); button.SetBinding(CommandProvider.CommandParameterProperty, new Binding(() => viewModel.StringProperty, BindingMode.TwoWay)); Assert.That(entry.ChangedSubscribeCount, Is.EqualTo(1)); Assert.That(button.GetCommandParameter(), Is.Null); button.SetCommandParameter("test"); Assert.That(viewModel.StringProperty, Is.EqualTo("test")); button.ClearBinding(CommandProvider.CommandParameterProperty); Assert.That(entry.ChangedSubscribeCount, Is.EqualTo(0)); Assert.That(viewModel.StringProperty, Is.EqualTo("test")); Assert.That(button.GetCommandParameter(), Is.Null); viewModel.StringProperty = "test2"; Assert.That(button.GetCommandParameter(), Is.Null); button.SetCommandParameter("test3"); } }
public void SetSimpleBindingBeforeSetDataContext() { using(var button = new Button()) { button.SetBinding("Text", new Binding()); Assert.That(button.HasLocalDataContext(), Is.False); button.SetDataContext("test"); Assert.That(button.Text, Is.EqualTo("test")); Assert.That(button.HasLocalDataContext(), Is.True); button.SetDataContext("test2"); Assert.That(button.Text, Is.EqualTo("test2")); button.ClearDataContext(); Assert.That(button.Text, Is.EqualTo(string.Empty)); button.SetDataContext("test3"); Assert.That(button.Text, Is.EqualTo("test3")); button.ClearBinding("Text"); button.ClearBinding("Tag"); Assert.That(button.Text, Is.EqualTo(string.Empty)); Assert.That(button.Tag, Is.Null); button.SetDataContext("test4"); Assert.That(button.Text, Is.EqualTo(string.Empty)); } }
public void SetBindingWithLambdaExpression() { using(var button = new Button()) { button.SetBinding(() => button.Text, new Binding()); button.SetDataContext("test"); Assert.That(button.Text, Is.EqualTo("test")); button.ClearBinding(() => button.Text); Assert.That(button.Text, Is.EqualTo(string.Empty)); } }
public void IsBoundProperty() { using(var button = new Button()) { button.SetBinding("Text", new Binding()); Assert.That(BindingOperations.IsBoundProperty(button, TypeDescriptor.GetProperties(button)["Text"]), Is.True); button.ClearBinding("Text"); Assert.That(BindingOperations.IsBoundProperty(button, TypeDescriptor.GetProperties(button)["Text"]), Is.False); } }
public void BindingWithPath() { var viewModel = new TestViewModel() { StringProperty = "test", StringProperty2 = "StringProperty2" }; using(var button = new Button()) { button.SetDataContext(viewModel); button.SetBinding(() => button.Text, new Binding("StringProperty")); Assert.That(button.Text, Is.EqualTo("test")); viewModel.StringProperty = "test2"; Assert.That(button.Text, Is.EqualTo("test2")); button.ClearBinding(() => button.Text); Assert.That(button.Text, Is.EqualTo(string.Empty)); button.SetBinding(() => button.Text, new Binding("StringProperty")); Assert.That(button.Text, Is.EqualTo("test2")); button.SetBinding(() => button.Text, new Binding("StringProperty2")); Assert.That(button.Text, Is.EqualTo("StringProperty2")); viewModel = new TestViewModel() { StringProperty2 = "StringProperty2_", NestedViewModel = new NestedTestViewModel() { NestedStringProperty = "NestedStringProperty" } }; button.SetDataContext(viewModel); Assert.That(button.Text, Is.EqualTo("StringProperty2_")); button.SetBinding(() => button.Text, new Binding("NestedViewModel.NestedStringProperty")); Assert.That(button.Text, Is.EqualTo("NestedStringProperty")); viewModel.NestedViewModel.NestedStringProperty = "NestedStringProperty2"; Assert.That(button.Text, Is.EqualTo("NestedStringProperty2")); viewModel.NestedViewModel = new NestedTestViewModel() { NestedStringProperty = "NestedStringProperty3" }; Assert.That(button.Text, Is.EqualTo("NestedStringProperty3")); viewModel.NestedViewModel = null; Assert.That(button.Text, Is.EqualTo(string.Empty)); } }