StringCollection.IList.Contains(Object) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Determines whether an element is in the StringCollection.
virtual bool System.Collections.IList.Contains(System::Object ^ value) = System::Collections::IList::Contains;
bool IList.Contains (object value);
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
Parameters
- value
- Object
The Object to locate in the StringCollection. The value can be null
.
Returns
true
if value
is found in the StringCollection; otherwise, false
.
Implements
Remarks
This method determines equality by calling Object.Equals.
This method performs a linear search; therefore, this method is an O(n
) operation, where n
is Count.
Starting with the .NET Framework 2.0, this method uses the collection's objects' Equals and CompareTo methods on item
to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the Equals and CompareTo methods of the item
parameter on the objects in the collection.
Applies to
See also
Maklum balas
https://aka.ms/ContentUserFeedback.
Akan datang: Sepanjang 2024, kami akan menghentikan secara berperingkat Isu GitHub sebagai kaedah maklum balas untuk kandungan dan menggantikannya dengan sistem maklum balas baharu. Untuk mendapatkan maklumat lanjut lihat:Kirim dan lihat maklum balas untuk