private void import(string filename)
{
try {
XmlDataDocument xml_doc = new XmlDataDocument();
xml_doc.Load(filename);
var lessonNodes = xml_doc.SelectNodes("//lesson");
foreach (XmlNode ln in lessonNodes)
{
int id = Convert.ToInt32(getAttributeOrDefault(ln, "id", "-1"));
string description = getAttributeOrDefault(ln, "description", "No description set");
var lesson = new LessonNode(id, description);
var pairNodes = ln.SelectNodes("pair");
foreach (XmlNode pn in pairNodes)
{
lesson.PairStore.AddNode(new PairNode(SelectTextNode(pn, "en"), SelectTextNode(pn, "de")));
}
LessonStore.AddNode(lesson);
}
} catch (FileNotFoundException) {
}
}
public LessonManager(LessonStore store)
{
if (store == null)
{
throw new ArgumentNullException("store");
}
_lessonStore = store;
}
