Collection<T>.IList.Contains(Object) 方法

定义

确定 IList 是否包含特定值。Determines whether the IList contains a specific value.

 virtual bool System.Collections.IList.Contains(System::Object ^ value) = System::Collections::IList::Contains;
bool IList.Contains (object value);
abstract member System.Collections.IList.Contains : obj -> bool
override this.System.Collections.IList.Contains : obj -> bool
Function Contains (value As Object) As Boolean Implements IList.Contains

参数

value
Object

要在 Object 中定位的 IListThe Object to locate in the IList.

返回

Boolean

如果在 IList 中找到了 Object,则为 true;否则为 falsetrue if the Object is found in the IList; otherwise, false.

实现

例外

value 是一个无法赋值给 IList 的类型。value is of a type that is not assignable to the IList.

注解

此方法通过首先确定是否 value 为类型 T (或 null) ,然后调用来确定相等性 ContainsThis method determines equality by first determining whether value is of type T (or null) and then calling Contains.

此方法是 O (n) 操作,其中 nCountThis method is an O(n) operation, where n is Count.

适用于