public static int Parse(this string input, int oldValue)
{
int newValue;
var parsed = int.TryParse(input, out newValue);
if (!parsed)
{
MessageBoxExtension.ShowWarning(onlyIntegerMessage);
return(oldValue);
}
return(newValue);
}
private static T ParseAndValidate <T>(bool parsed, T newValue, T oldValue, IValidator <T> validator, string parseFailedMessage)
{
if (!parsed)
{
MessageBoxExtension.ShowWarning(parseFailedMessage);
return(oldValue);
}
if (!validator.IsValid(newValue))
{
MessageBoxExtension.ShowWarning(validator.GetInvalidInfoMessage());
return(oldValue);
}
return(newValue);
}