private object GetTargetValue(IBindingMemberInfo targetMember, IDataContext context, bool throwOnError)
{
object value = GetRawValueInternal(targetMember, context, throwOnError);
if (value.IsUnsetValueOrDoNothing())
{
return(value);
}
if (_parameters.ConverterDelegate != null)
{
IBindingValueConverter converter = _parameters.ConverterDelegate(context);
if (converter != null)
{
CultureInfo culture = _parameters.ConverterCultureDelegate.GetValueOrDefault(context, BindingServiceProvider.BindingCultureInfo());
object parameter = _parameters.ConverterParameterDelegate.GetValueOrDefault(context);
value = converter.ConvertBack(value, targetMember.Type, parameter, culture, context);
}
}
if (Equals(value, _parameters.TargetNullValue))
{
return(null);
}
return(value);
}
private object GetSourceValue(IBindingMemberInfo targetMember, IDataContext context, bool throwOnError)
{
var isDebuggable = IsDebuggable;
object value = GetRawValueInternal(targetMember, context, throwOnError);
if (isDebuggable)
{
DebugInfo($"Got a source value: '{value}'");
}
if (value.IsDoNothing())
{
return(BindingConstants.DoNothing);
}
if (_parameters.ConverterDelegate != null && !value.IsUnsetValue())
{
IBindingValueConverter converter = _parameters.ConverterDelegate(context);
if (converter != null)
{
CultureInfo culture = _parameters.ConverterCultureDelegate?.Invoke(context) ?? BindingServiceProvider.BindingCultureInfo();
object parameter = _parameters.ConverterParameterDelegate?.Invoke(context);
if (isDebuggable)
{
DebugInfo($"Applying converter for source value: '{value}', converter: '{converter}', parameter: '{parameter}', culture: {culture}, target type: '{targetMember.Type}'");
value = converter.Convert(value, targetMember.Type, parameter, culture, context);
DebugInfo($"Converter '{converter}' returns value: '{value}'");
}
else
{
value = converter.Convert(value, targetMember.Type, parameter, culture, context);
}
}
}
if (value.IsUnsetValue())
{
value = _parameters.FallbackDelegate?.Invoke(context) ?? targetMember.Type.GetDefaultValue();
}
if (value == null)
{
return(_parameters.TargetNullValue);
}
return(value);
}