删除列表数据

Question

嗨，我有这样的代码

List<CQuizOccurrence> matchData = new List<CQuizOccurrence>();
foreach (CQuizOccurrence myQuizOccurrence in Global.quizOccurrences) 
{
    DateTime dtDatabase = (DateTime)myQuizOccurrence.occurred;
    string dt = dtDatabase.ToString();
    if (dt == dateOccur) {
        matchData.Add(myQuizOccurrence);
    }
}

foreach (CQuizOccurrence myQuizOccurrence in matchData)
{
    Global.quizOccurrences.RemoveAt(0);
}

我认为代码将能够删除'dt 'Global.quizOccurences‘数据，其中’dt == dateOccur'，但我错了，它只是简单地删除'Global.quizOccurences‘与索引0

如何根据我的意愿改正(斜体和粗体文本)

Answer 1

尝试更改这一行：

Global.quizOccurrences.RemoveAt(0);

对此：

Global.quizOccurrences.Remove(myQuizOccurrence);

Answer 2

RemoveAt()移除指定索引处的项。在这种情况下，需要删除与特定条件匹配的项，而不是列表开头的项。

var itemsToRemove = Global.quizOccurrences
    .Where(q => q.occurred.ToString() == dateOccur)
    .ToList();

foreach(var quizOccurrence in itemsToRemove)
{
    Global.quizOccurrences.Remove(quizOccurrence);
}