OrderedDictionary.RemoveAt(Int32) 方法
定义
重要
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从 OrderedDictionary 集合中移除指定索引处的项。
public:
virtual void RemoveAt(int index);public void RemoveAt (int index);abstract member RemoveAt : int -> unit
override this.RemoveAt : int -> unitPublic Sub RemoveAt (index As Integer)参数
- index
- Int32
要移除的项的从零开始的索引。
实现
例外
示例
下面的代码示例演示了对集合的 OrderedDictionary 修改。 在此示例中， RemoveAt 方法与 Count 属性一起使用，以从 中删除最后一 OrderedDictionary个条目。 此代码是可在 中查看的较大代码示例的一 OrderedDictionary部分。
// Modifying the OrderedDictionary
if (!myOrderedDictionary->IsReadOnly)
{
// Insert a new key to the beginning of the OrderedDictionary
myOrderedDictionary->Insert(0, "insertedKey1", "insertedValue1");
// Modify the value of the entry with the key "testKey2"
myOrderedDictionary["testKey2"] = "modifiedValue";
// Remove the last entry from the OrderedDictionary: "testKey3"
myOrderedDictionary->RemoveAt(myOrderedDictionary->Count - 1);
// Remove the "keyToDelete" entry, if it exists
if (myOrderedDictionary->Contains("keyToDelete"))
{
myOrderedDictionary->Remove("keyToDelete");
}
}
// Modifying the OrderedDictionary
if (!myOrderedDictionary.IsReadOnly)
{
// Insert a new key to the beginning of the OrderedDictionary
myOrderedDictionary.Insert(0, "insertedKey1", "insertedValue1");
// Modify the value of the entry with the key "testKey2"
myOrderedDictionary["testKey2"] = "modifiedValue";
// Remove the last entry from the OrderedDictionary: "testKey3"
myOrderedDictionary.RemoveAt(myOrderedDictionary.Count - 1);
// Remove the "keyToDelete" entry, if it exists
if (myOrderedDictionary.Contains("keyToDelete"))
{
myOrderedDictionary.Remove("keyToDelete");
}
}
' Modifying the OrderedDictionary
If Not myOrderedDictionary.IsReadOnly Then
' Insert a new key to the beginning of the OrderedDictionary
myOrderedDictionary.Insert(0, "insertedKey1", "insertedValue1")
' Modify the value of the entry with the key "testKey2"
myOrderedDictionary("testKey2") = "modifiedValue"
' Remove the last entry from the OrderedDictionary: "testKey3"
myOrderedDictionary.RemoveAt(myOrderedDictionary.Count - 1)
' Remove the "keyToDelete" entry, if it exists
If (myOrderedDictionary.Contains("keyToDelete")) Then
myOrderedDictionary.Remove("keyToDelete")
End If
End If
注解
删除条目后面的条目会向上移动以占据空位，并且也会更新移动的条目的索引。
