private static List<Review> FindReviewsByReviewQuery(BookstoreDAL dal,
BookstoreEntities context, XmlNode query)
{
string type = GetChildText(query, "@type");
List<Review> foundReviews = null;
switch (type)
{
case "by-period":
string startDateString = GetChildText(query, "start-date");
string endDateString = GetChildText(query, "end-date");
DateTime startDate = DateTime.Parse(startDateString);
DateTime endDate = DateTime.Parse(endDateString);
foundReviews =
dal.FindReviewsByPeriod(context, startDate, endDate);
break;
case "by-author":
string authorName = GetChildText(query, "author-name");
foundReviews =
dal.FindReviewsByAuthor(context, authorName);
break;
default:
throw new ArgumentException("Invalid review query type. " +
"Must be 'by-period' or 'by-author'.");
}
return foundReviews;
}
