public override void readFromFile(FileStream infile)
{
try {
//read a line, use extension class
String str = infile.readLine();
String[] tokens = str.Split(new char[] { ',' });
if (String.Equals(tokens[0], "Ice Cream Cone", StringComparison.OrdinalIgnoreCase)) {
//throws a type mismatch exception if file is bad
this.NumScoops = Convert.ToInt32(tokens[1]);
this.ConeFlavor = tokens[2];
}
else {
//rewind the input stream, use extension class
infile.rewind();
throw new ConeTypeMismatchException();//trying to read non cone data
}
}
catch (System.IO.FileNotFoundException) { throw; }//file not found
catch (System.NullReferenceException) {
//something is wrong with the input file, or most likely end of file
infile.Close();//close the readers
reader.Close();
infile = null;//deallocate memory
throw;//inform calling method there are no more records
}
catch (FormatException) { throw; }//input is not in the right format
}
