public int Compare(Student x, Student y)
{
decimal scoreX = _target.GetScore(x);
decimal scoreY = _target.GetScore(y);
//反過來排，由大到小。
return(scoreY.CompareTo(scoreX));
}
public static void Rank(RatingScope scope, IRatingTarget targetScore, RatingMethod method)
{
//int t1 = Environment.TickCount;
List <Student> students = scope.GetContainTargetList(targetScore);
//按成績高低排序。
students.Sort(new ScoreComparer(targetScore));
//實際有包含成績的人數。
int actualBase = students.Count;
//所有被排名的人數。
int baseCount = scope.Count;
//名次決定演算法。
IRatingAlgorithm placeDecision = GetAlgorithm(method);
foreach (Student eachStudent in students)
{
//決定名次
int place = placeDecision.NextPlace(targetScore.GetScore(eachStudent));
//寫入名次資訊。
targetScore.SetPlace(eachStudent, new ResultPlace(scope, targetScore, baseCount, actualBase, place));
}
//string msg = "排名時間：{0} 範圍名稱：{1} 成績名稱：{2}";
//Console.WriteLine(msg, Environment.TickCount - t1, scope.Name, targetScore.Name);
}
private void lvTargets_Click(object sender, EventArgs e)
{
if (lvScopes.FocusedItem == null)
{
return;
}
if (lvTargets.FocusedItem == null)
{
return;
}
HighlighSelected(sender as ListView);
IRatingTarget target = lvTargets.FocusedItem.Tag as IRatingTarget;
RatingScope scope = lvScopes.FocusedItem.Tag as RatingScope;
lvPlace.SuspendLayout();
lvPlace.Items.Clear();
List <ListViewItem> items = new List <ListViewItem>();
foreach (Student eachStu in scope)
{
ListViewItem item = new ListViewItem();
item.Text = eachStu.ClassName;
item.SubItems.Add(eachStu.SeatNumber);
item.SubItems.Add(eachStu.Name);
decimal score = target.GetScore(eachStu);
if (score == decimal.MinValue)
{
item.SubItems.Add("無");
}
else
{
item.SubItems.Add(score.ToString());
}
ResultPlace place = target.GetPlace(eachStu, scope.ScopeType);
if (place == null)
{
item.SubItems.Add("無");
}
else
{
item.SubItems.Add(place.Place.ToString());
}
item.Tag = eachStu;
items.Add(item);
}
lvPlace.Items.AddRange(items.ToArray());
lvPlace.ResumeLayout();
}