PropertyCollection.IDictionary.Contains(Object) 方法

定義

命名空間:

System.DirectoryServices

組件:

System.DirectoryServices.dll

套件:

System.DirectoryServices v8.0.0

來源:

PropertyCollection.cs

判斷 IDictionary 物件是否包含具有指定索引鍵的項目。

 virtual bool System.Collections.IDictionary.Contains(System::Object ^ value) = System::Collections::IDictionary::Contains;

bool IDictionary.Contains (object value);

abstract member System.Collections.IDictionary.Contains : obj -> bool
override this.System.Collections.IDictionary.Contains : obj -> bool

Function Contains (value As Object) As Boolean Implements IDictionary.Contains

參數

value

Object

要在 IDictionary 物件中尋找的索引鍵。

傳回

Boolean

如果 true 包含具有該索引鍵的項目，則為 IDictionary，否則為 false。

實作

Contains(Object)

例外狀況

ArgumentNullException

key 為 null。

範例

下列範例示範如何實作 Contains 方法。 這個範例是提供給 類別之較大範例的 IDictionary 一部分。

public:
    virtual bool Contains(Object^ key)
    {
        int index;
        return TryGetIndexOfKey(key, &index);
    }

public bool Contains(object key)
{
   Int32 index;
   return TryGetIndexOfKey(key, out index);
}

Public Function Contains(ByVal key As Object) As Boolean Implements IDictionary.Contains
    Dim index As Integer
    Return TryGetIndexOfKey(key, index)
End Function