OrderedDictionary.Remove(Object) 方法

定义

命名空间:

System.Collections.Specialized

程序集:

System.Collections.Specialized.dll

Source:

OrderedDictionary.cs

从 OrderedDictionary 集合中移除具有指定键的项。

public:
 virtual void Remove(System::Object ^ key);

public void Remove (object key);

abstract member Remove : obj -> unit
override this.Remove : obj -> unit

Public Sub Remove (key As Object)

参数

key

Object

要移除的条目的键。

实现

Remove(Object)

例外

NotSupportedException

OrderedDictionary 集合为只读。

ArgumentNullException

key 为 null。

示例

下面的代码示例演示了对集合的 OrderedDictionary 修改。 在此示例中， Remove 方法用于从 中删除具有 键 "keyToDelete" 的 OrderedDictionary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。

OrderedDictionary如果集合不包含具有指定键的条目，则 OrderedDictionary 保持不变，并且不会引发异常。