public override ValidationResult Validate(object value, System.Globalization.CultureInfo cultureInfo)
{
CurrencyAlertData alertData = (value as BindingExpression).DataItem as CurrencyAlertData;
if ((value as BindingExpression).ResolvedSourcePropertyName == "LowerBound")
{
if (alertData.LowerBound >= alertData.Price)
{
return(new ValidationResult(false, "Lower bound should be less than current price."));
}
}
if ((value as BindingExpression).ResolvedSourcePropertyName == "UpperBound")
{
if (alertData.UpperBound <= alertData.Price || alertData.UpperBound == 0)
{
return(new ValidationResult(false, "Upper bound should be greater than current price."));
}
}
return(ValidationResult.ValidResult);
}
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (values[3] == null)
{
return(false);
}
CurrencyAlertData alertData = values[3] as CurrencyAlertData;
if (values[0] != null && values[1] != null && values[2] != null)
{
double lowerBound = (double)values[0];
double upperBound = (double)values[2];
if (lowerBound == 0 && upperBound == 0)
{
alertData.IsAlerted = false;
return(false);
}
double price = (double)values[1];
if (lowerBound > 0 && price <= lowerBound)
{
alertData.IsAlerted = true;
return(true);
}
if (upperBound > 0 && price >= upperBound)
{
alertData.IsAlerted = true;
return(true);
}
}
alertData.IsAlerted = false;
return(false);
}
