public int TryParseFormula(out string errorMsg)
{
string formulaSummary = string.Empty;;
int retVal = Constants.Success;
FormulaSummary = string.Empty;
errorMsg = string.Empty;
double molarMass = 0;
MolarMass = 0;
try
{
if (!Regex.IsMatch(formula, allowedElements,
RegexOptions.CultureInvariant | RegexOptions.Compiled | RegexOptions.Singleline))
{
retVal = Constants.Failure;
errorMsg = "Check formula, only elements and parentheses () allowed.";
}
if (retVal == Constants.Success)
{
retVal = parser.SetFormula(Formula, out formulaSummary, out molarMass);
if (retVal == Constants.Success)
{
MolarMass = molarMass;
FormulaSummary = formulaSummary;
}
else
{
errorMsg = parser.GetLastError();
}
}
}
catch (Exception ex)
{
retVal = Constants.Failure;
errorMsg = string.Format("An unexpected error occurred: {0}", ex.Message);
}
return(retVal);
}
