Object. On Begin Open(TimeSpan, AsyncCallback, Object) 方法
在通訊物件上插入處理 (當它因為叫用非同步開啟作業而轉換到開啟狀態之後)。Inserts processing on a communication object after it transitions to the opening state due to the invocation of an asynchronous open operation.
protected: abstract IAsyncResult ^ OnBeginOpen(TimeSpan timeout, AsyncCallback ^ callback, System::Object ^ state);
protected abstract IAsyncResult OnBeginOpen (TimeSpan timeout, AsyncCallback callback, object state);
abstract member OnBeginOpen : TimeSpan * AsyncCallback * obj -> IAsyncResult
Protected MustOverride Function OnBeginOpen (timeout As TimeSpan, callback As AsyncCallback, state As Object) As IAsyncResult
應用程式所指定的物件，其中包含與非同步開啟作業相關的狀態資訊。An object, specified by the application, that contains state information associated with the asynchronous on open operation.
已超過為作業分配的預設時間間隔，該作業未完成。The default interval of time that was allotted for the operation was exceeded before the operation was completed.
若要在通訊物件因為叫用同步 Open 作業而轉換至開啟狀態後插入處理，請使用 Open 方法。To insert processing after a communication object transitions to a opening state due to the invocation of a synchronous Open operation, use the Open method.