/// <summary> /// Invokes callback for a read annotations request. /// </summary> private bool InvokeCallback(ReadAnnotationsEventHandler callback, object results) { // check for valid result type. if (!typeof(AnnotationValueCollection[]).IsInstanceOfType(results)) { return(false); } AnnotationValueCollection[] values = (AnnotationValueCollection[])results; // update item handles and actual times. UpdateResults(values); try { callback(this, values); } catch { // ignore exceptions in the callbacks. } // request always completes return(true); }
/// <summary> /// Starts an asynchronous read annotations request for all items in the trend. /// </summary> public IdentifiedResult[] ReadAnnotations( object requestHandle, ReadAnnotationsEventHandler callback, out IRequest request) { return(ReadAnnotations(GetItems(), requestHandle, callback, out request)); }
/// <summary> /// Starts an asynchronous read annotations request for a set of items. /// </summary> public IdentifiedResult[] ReadAnnotations( Item[] items, object requestHandle, ReadAnnotationsEventHandler callback, out IRequest request) { IdentifiedResult[] results = m_server.ReadAnnotations( StartTime, EndTime, items, requestHandle, callback, out request); return(results); }
private bool InvokeCallback(ReadAnnotationsEventHandler callback, object results) { if (!typeof(AnnotationValueCollection[]).IsInstanceOfType(results)) { return(false); } AnnotationValueCollection[] valuesArray = (AnnotationValueCollection[])results; this.UpdateResults(valuesArray); try { callback(this, valuesArray); } catch { } return(true); }
/// <summary> /// Sends an asynchronous request to read the annotations for a set of items. /// </summary> /// <param name="startTime">The beginning of the history period to read.</param> /// <param name="endTime">The end of the history period to be read.</param> /// <param name="items">The set of items to read (must include the server handle).</param> /// <param name="requestHandle">An identifier for the request assigned by the caller.</param> /// <param name="callback">A delegate used to receive notifications when the request completes.</param> /// <param name="request">An object that contains the state of the request (used to cancel the request).</param> /// <returns>A set of results containing any errors encountered when the server validated the items.</returns> public IdentifiedResult[] ReadAnnotations( Time startTime, Time endTime, ItemIdentifier[] items, object requestHandle, ReadAnnotationsEventHandler callback, out IRequest request) { if (m_server == null) { throw new NotConnectedException(); } IdentifiedResult[] results = ((IServer)m_server).ReadAnnotations( startTime, endTime, items, requestHandle, callback, out request); return(results); }
public IdentifiedResult[] ReadAnnotations(Item[] items, object requestHandle, ReadAnnotationsEventHandler callback, out IRequest request) { return(this.m_server.ReadAnnotations(this.StartTime, this.EndTime, items, requestHandle, callback, out request)); }
public IdentifiedResult[] ReadAnnotations(Time startTime, Time endTime, ItemIdentifier[] items, object requestHandle, ReadAnnotationsEventHandler callback, out IRequest request) { if (base.m_server == null) { throw new NotConnectedException(); } return(((Opc.Hda.IServer)base.m_server).ReadAnnotations(startTime, endTime, items, requestHandle, callback, out request)); }