刪除列表數據的foreach

您好我有這樣的代碼刪除列表數據的foreach

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); 
}

我認爲代碼將能夠刪除「Global.quizOccurences」數據，但我這「DT == dateOccur」錯了，它只是簡單地刪除「Global.quizOccurences」索引0

如何糾正它，因爲我想（斜體&粗體文本）

來源

2014-02-05 Neversaysblack

也許你只想'Global.quizOccurences.RemoveWhere（QO =>（（DATETIME）qo.occurred）的ToString（）== dateOccur）;' – Blablablaster

@Blablablaster我不能使用.removeWhere屬性...在框架4.0中可用嗎？ – Neversaysblack

認爲它應該是'RemoveAll（Predicate match）'http://msdn.microsoft.com/en-us/library/wdka673a(v=vs.110).aspx – Ric

試圖改變這一行：

Global.quizOccurrences.RemoveAt(0);

這樣：

Global.quizOccurrences.Remove(myQuizOccurrence);

來源

2014-02-05 08:21:25 har07

忘記了...感謝您的正確 – Neversaysblack

RemoveAt()刪除指定索引處的項目。在你的情況下，你需要刪除符合特定條件的項目，而不是列表開始的項目。

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

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

來源

2014-02-05 08:23:22 RePierre

刪除列表數據的foreach

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