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));
}
}
