/// <inheritdoc />
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
var formatter = values[0] as IQuantityFormatter;
if (formatter == null)
{
return("first argument must be a IQuantityFormatter");
}
var row = values[0] as Row;
if (row == null)
{
return("first argument must be a Row");
}
var oldValueStringFormat = row.OldValueStringFormat;
if (!string.IsNullOrEmpty(oldValueStringFormat) &&
FormatString.IsValidFormat(oldValueStringFormat, out var numberOfArguments, out var anyItemHasFormat))
{
if (numberOfArguments == 1 && anyItemHasFormat == false)
{
var formattedValue = formatter.Format(row.OldValue as IQuantity);
return(string.Format(row.OldValueStringFormat, formattedValue));
}
return(string.Format(NumericBox.GetCulture(row), oldValueStringFormat, row.OldValue));
}
return(oldValueStringFormat);
}
public void IsValidFormatWithOutParams(string text, bool expected, int expectedIndex, bool?expectedFormat)
{
int count;
bool?anyItemHasFormat;
Assert.AreEqual(expected, FormatString.IsValidFormat(text, out count, out anyItemHasFormat));
Assert.AreEqual(expectedIndex, count);
Assert.AreEqual(expectedFormat, anyItemHasFormat);
}