问如何在Xamarin窗体上用编辑器的"TailTruncation“模式显示文本？

EN

public class FullToShortConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string fullText = (string)value;
            string tempString = "";

            if (string.IsNullOrWhiteSpace(fullName)) {
                return string.Empty;
            }

            if (parameter == null) { // You can pass desired string length as a parameter
                // Assuming you want a string of length 10. 
                // Then 0..6 is 7 chars + three dots
                // There is no sense in changing the last 3 letters with ellipsis
                tempStr = fullText.Length > 10 ? fullText.Substring(0, 6) + "..." : fullText;
            } else {
                int maxChars = (int)parameter;
                tempStr = fullText.Length > maxChars ? fullText.Substring(0, maxChars - 3) + "..." : fullText;
            }

            return tempStr;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new InvalidCastException("Should never come here");
        }
    }