public void Add(Mark mark)
{
if (list.Exists(item => item.ID == mark.ID))
return;
list.Add(mark);
}
public void Delete(Mark mark)
{
SsDTP ssDTP = getItem(mark);
list.Remove(ssDTP);
ssDTP.Delete();
}
protected override void loadFromSql()
{
DataTable dt = _provider.Select("Mark");
foreach (DataRow row in dt.Rows)
{
Mark mark = new Mark(row);
Add(mark);
}
}
public SsDTP getItem(Mark mark)
{
return list.FirstOrDefault(item => item.Mark.ID == mark.ID);
}