DataServiceQuery<TElement>.BeginExecute 方法
啟動非同步網路作業,執行這個物件執行個體所表示的查詢。
命名空間: System.Data.Services.Client
組件: Microsoft.Data.Services.Client (在 Microsoft.Data.Services.Client.dll 中)
語法
'宣告
Public Function BeginExecute ( _
callback As AsyncCallback, _
state As Object _
) As IAsyncResult
'用途
Dim instance As DataServiceQuery
Dim callback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult
returnValue = instance.BeginExecute(callback, _
state)
public IAsyncResult BeginExecute(
AsyncCallback callback,
Object state
)
public:
IAsyncResult^ BeginExecute(
AsyncCallback^ callback,
Object^ state
)
member BeginExecute :
callback:AsyncCallback *
state:Object -> IAsyncResult
public function BeginExecute(
callback : AsyncCallback,
state : Object
) : IAsyncResult
參數
- callback
型別:System.AsyncCallback
作業完成時要叫用的委派 (Delegate)。
- state
型別:System.Object
使用者定義的物件,用來在啟動作業與 callback 所定義的回呼 (Callback) 之間傳輸狀態。
傳回值
型別:System.IAsyncResult
IAsyncResult ,表示非同步作業的狀態。