public void WhenDataContextChanges()
{
var textBox = new System.Windows.Controls.TextBox {
DataContext = null
};
var binding = new Binding
{
Path = new PropertyPath(DummyViewModel.NullableDoubleValuePropertyName),
Mode = BindingMode.TwoWay
};
BindingOperations.SetBinding(textBox, Input.ValueProperty, binding);
textBox.RaiseLoadedEvent();
Assert.AreEqual(null, textBox.GetSourceValueType());
var vm = new DummyViewModel {
NullableDoubleValue = null
};
textBox.DataContext = vm;
Assert.AreEqual(typeof(double?), textBox.GetSourceValueType());
}
public void NullableDoubleNotNull()
{
var vm = new DummyViewModel {
NullableDoubleValue = 1
};
var textBox = new System.Windows.Controls.TextBox {
DataContext = vm
};
var binding = new Binding
{
Path = new PropertyPath(DummyViewModel.NullableDoubleValuePropertyName),
Mode = BindingMode.TwoWay
};
BindingOperations.SetBinding(textBox, Input.ValueProperty, binding);
textBox.RaiseLoadedEvent();
textBox.RaiseEvent(new RoutedEventArgs(FrameworkElement.LoadedEvent));
Assert.AreEqual(typeof(double?), textBox.GetSourceValueType());
vm.NullableDoubleValue = 1;
Assert.AreEqual(typeof(double?), textBox.GetSourceValueType());
}
public void WithConverterExplicit()
{
var vm = new DummyViewModel {
StringIntValue = "1"
};
var textBox = new System.Windows.Controls.TextBox {
DataContext = vm
};
var binding = new Binding
{
Converter = new StringToIntConverter(),
Path = new PropertyPath(DummyViewModel.StringIntValuePropertyName),
Mode = BindingMode.TwoWay
};
textBox.SetSourceValueType(SourceValueTypes.Int32);
BindingOperations.SetBinding(textBox, Input.ValueProperty, binding);
DesignMode.IsInDesignModeForTests = true;
textBox.RaiseLoadedEvent();
Assert.AreEqual(typeof(int), textBox.GetSourceValueType());
}