Filehelpers Field max length - validation

Question

I'm working with Filehelpers and imported a csv File. Everything works fine, but now I want to validate the length of the imported Fields.
[DelimitedRecord(";")]
public class ImportFile
{
public string Name;
public string NameSurname;
}
Is there a possible way, that I can create an attribute "MaxLength" which split the Input String or Throw an Exception, if the InputString is bigger than my MaxLength Attribut?
The only thing I found was the FieldFlixedLength, but thats only the Split, the Inputfile in fields.

Answer 1

You can implement an AfterRead event as follows:
[DelimitedRecord(";")]
public class ImportRecord : INotifyRead<ImportRecord>
{
public string Name;
public string NameSurname;
public void BeforeRead(BeforeReadEventArgs<ImportRecord> e)
{
}
public void AfterRead(AfterReadEventArgs<ImportRecord> e)
{
if (e.Record.Name.Length > 20)
throw new Exception("Line " + e.LineNumber + ": First name is too long");
if (e.Record.NameSurname.Length > 20)
throw new Exception("Line " + e.LineNumber + ": Surname name is too long");
}
}
class Program
{
static void Main(string[] args)
{
var engine = new FileHelperEngine<ImportRecord>();
engine.ErrorMode = ErrorMode.SaveAndContinue;
string fileAsString = "Firstname;SurnameIsAVeryLongName" + Environment.NewLine
+ "FirstName;SurnameIsShort";
ImportRecord[] validRecords = engine.ReadString(fileAsString);
Console.ForegroundColor = ConsoleColor.Red;
foreach (ErrorInfo error in engine.ErrorManager.Errors)
{
Console.WriteLine(error.ExceptionInfo.Message);
}
Console.ForegroundColor = ConsoleColor.White;
foreach (ImportRecord validRecord in validRecords)
{
Console.WriteLine(String.Format("Successfully read record: {0} {1}", validRecord.Name, validRecord.NameSurname));
}
Console.WriteLine("Press any key...");
Console.ReadKey();
}
}