EntityConnection.OpenAsync 方法 (CancellationToken)
[此頁面專屬於 Entity Framework 第 6 版。最新版本可從 'Entity Framework' NuGet 套件取得。如需 Entity Framework 的詳細資訊,請參閱 msdn.com/data/ef。]
在基礎資料提供者上呼叫 Open 方法,以非同步方式建立與資料存放區的連接
命名空間: System.Data.Entity.Core.EntityClient
組件: EntityFramework (在 EntityFramework.dll 中)
語法
'宣告
<DebuggerStepThroughAttribute> _
Public Overrides Function OpenAsync ( _
cancellationToken As CancellationToken _
) As Task
'用途
Dim instance As EntityConnection
Dim cancellationToken As CancellationToken
Dim returnValue As Task
returnValue = instance.OpenAsync(cancellationToken)
[DebuggerStepThroughAttribute]
public override Task OpenAsync(
CancellationToken cancellationToken
)
[DebuggerStepThroughAttribute]
public:
virtual Task^ OpenAsync(
CancellationToken cancellationToken
) override
[<DebuggerStepThroughAttribute>]
abstract OpenAsync :
cancellationToken:CancellationToken -> Task
[<DebuggerStepThroughAttribute>]
override OpenAsync :
cancellationToken:CancellationToken -> Task
public override function OpenAsync(
cancellationToken : CancellationToken
) : Task
參數
- cancellationToken
類型:System.Threading.CancellationToken
等候工作完成時要觀察的 CancellationToken。
傳回值
類型:System.Threading.Tasks.Task
表示非同步作業的工作。