public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
bool result;
switch (value)
{
case int intNumber:
result = intNumber == 0;
break;
case double doubleNumber:
result = Math.Abs(doubleNumber) < 0.0001d;
break;
default:
return(null);
}
var param = ConverterUtils.GetConverterParameter(parameter);
return(param == ConverterParameter.Negation
? !result
: result);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
bool result;
switch (value)
{
case null:
result = true;
break;
case string text:
result = string.IsNullOrWhiteSpace(text);
break;
default:
return(null);
}
var converterParam = ConverterUtils.GetConverterParameter(parameter);
return(converterParam == ConverterParameter.Negation
? !result
: result);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var result = value == null;
var param = ConverterUtils.GetConverterParameter(parameter);
return(param == ConverterParameter.Negation
? !result
: result);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (!(value is ICollection collection))
{
return(null);
}
var result = collection.Count == 0;
var converterParam = ConverterUtils.GetConverterParameter(parameter);
return(converterParam == ConverterParameter.Negation
? !result
: result);
}
