private void combo_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// Update DataContext
ComboBox comboBox = (ComboBox)sender;
CustomerViewModel customerViewModel = (CustomerViewModel)this.DataContext;
Type _type = customerViewModel.GetType();
// verify if property name exists in model
customerViewModel.VerifyPropertyName(StatusName);
// use reflection to update selected value in data context
PropertyInfo _propertyInfo = _type.GetProperty(StatusName.ToString());
EnumItem item = (EnumItem)combo.SelectedItem;
Status MyStatus = (Status)Enum.Parse(typeof(Status), item.Value.ToString(), true);
_propertyInfo.SetValue(customerViewModel, MyStatus);
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
EnumItem item = value as EnumItem;
if (item != null)
{
if (destinationType == typeof(String))
{
return(item.ToString());
}
if (destinationType == typeof(UIElement))
{
object displayValue = item.DisplayValue;
if (displayValue == null || displayValue is String)
{
TextBlock textBlock = new TextBlock();
textBlock.Text = item.ToString();
return(textBlock);
}
else if (displayValue is UIElement)
{
if (VisualTreeHelper.GetParent((UIElement)displayValue) != null)
{
// Clone UIElement to allow it to be used several times.
string str = XamlWriter.Save(displayValue);
StringReader sr = new StringReader(str);
XmlReader xr = XmlReader.Create(sr);
UIElement ret = (UIElement)XamlReader.Load(xr);
return(ret);
}
else
{
return(displayValue);
}
}
if (displayValue is DataTemplate)
{
ContentPresenter presenter = new ContentPresenter();
presenter.Content = item;
presenter.ContentTemplate = (DataTemplate)displayValue;
return(presenter);
}
else if (displayValue is Style)
{
TextBlock textBlock = new TextBlock();
textBlock.Style = (Style)displayValue;
textBlock.Text = item.ToString();
return(textBlock);
}
else if (displayValue is ImageSource)
{
System.Windows.Controls.Image image = new System.Windows.Controls.Image();
image.Source = (ImageSource)displayValue;
return(image);
}
else if (displayValue is Drawing)
{
System.Windows.Controls.Image image = new System.Windows.Controls.Image();
image.Source = new DrawingImage((Drawing)displayValue);
return(image);
}
else if (displayValue is System.Windows.Media.Brush)
{
TextBlock textBlock = new TextBlock();
textBlock.Background = (System.Windows.Media.Brush)displayValue;
textBlock.Text = item.ToString();
return(textBlock);
}
else
{
TypeConverter converter = TypeDescriptor.GetConverter(displayValue);
if (converter.CanConvertTo(typeof(UIElement)))
{
UIElement element = converter.ConvertTo(context, culture, displayValue, typeof(UIElement)) as UIElement;
if (element != null)
{
return(element);
}
}
String text;
if (converter.CanConvertTo(typeof(string)))
{
text = converter.ConvertToString(context, culture, displayValue);
}
else
{
text = displayValue.ToString();
}
TextBlock textBlock = new TextBlock();
textBlock.Text = text;
return(textBlock);
}
}
if (destinationType == typeof(ImageSource))
{
Object displayValue = item.DisplayValue;
if (displayValue == null || displayValue is ImageSource)
{
return(displayValue);
}
ImageSourceConverter imageSourceConverter = new ImageSourceConverter();
if (imageSourceConverter.CanConvertFrom(context, displayValue.GetType()))
{
object convertedValue = imageSourceConverter.ConvertFrom(context, culture, displayValue);
return(convertedValue);
}
}
else
{
Object displayValue = item.DisplayValue;
if (displayValue == null || destinationType.IsAssignableFrom(displayValue.GetType()))
{
return(displayValue);
}
TypeConverter converter = TypeDescriptor.GetConverter(destinationType);
if (converter.CanConvertFrom(displayValue.GetType()))
{
object convertedValue = converter.ConvertFrom(context, culture, displayValue);
return(convertedValue);
}
else
{
Debug.Print("Unable to convert display value to target type: " + destinationType.FullName);
return(displayValue);
}
}
}
return(null);
}
