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ValueConverterGroup with parameters.
public class ValueConverterGroup : List<IValueConverter>, IValueConverter
{
private string[] _parameters;
private bool _shouldReverse = false;
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
ExtractParameters(parameter);
if (_shouldReverse)
{
Reverse();
_shouldReverse = false;
}
return this.Aggregate(value, (current, converter) => converter.Convert(current, targetType, GetParameter(converter), culture));
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
ExtractParameters(parameter);
Reverse();
_shouldReverse = true;
return this.Aggregate(value, (current, converter) => converter.ConvertBack(current, targetType, GetParameter(converter), culture));
}
private void ExtractParameters(object parameter)
{
if (parameter != null)
_parameters = Regex.Split(parameter.ToString(), @"(?<!\\),");
}
private string GetParameter(IValueConverter converter)
{
if (_parameters == null)
return null;
var index = IndexOf(converter as IValueConverter);
string parameter;
try
{
parameter = _parameters[index];
}
catch (IndexOutOfRangeException ex)
{
parameter = null;
}
if (parameter != null)
parameter = Regex.Unescape(parameter);
return parameter;
}
}
@IGonza

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IGonza commented May 31, 2019

Hi,
Thanks for this code. It helped.
I’m wondering., shouldn’t parameter be reversed as well?
Thanks,
Igor

@awatertrevi

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Owner Author

awatertrevi commented Aug 30, 2019

Hi @IGonza,

I think you are right. I shall try to update the snippet as soon as possible.

Thanks,

Trevi

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