/// <summary>
/// Completes an asynchronous request cancel
/// </summary>
private void OnCancel(object stateInfo)
{
try
{
lock (this)
{
// check if subscription object has been disposed.
if (m_disposed)
{
return;
}
}
// unmarshal arguments.
Opc.Da.Request request = null;
CancelCompleteEventHandler callback = null;
if (typeof(object[]).IsInstanceOfType(stateInfo))
{
request = (Opc.Da.Request)((object[])stateInfo)[0];
callback = (CancelCompleteEventHandler)((object[])stateInfo)[1];
}
// invoke callback.
callback(request.Handle);
}
catch (Exception e)
{
string message = e.Message;
}
}
/// <summary>
/// Cancels an existing request.
/// </summary>
public bool CancelRequest(Request request, CancelCompleteEventHandler callback)
{
lock (this)
{
// check if it is a valid request.
if (!m_requests.Contains(request.RequestID))
{
return(false);
}
// request will be removed when the cancel complete callback arrives.
if (callback != null)
{
request.CancelComplete += callback;
}
// no confirmation required - remove request immediately.
else
{
m_requests.Remove(request.RequestID);
}
// request will be cancelled.
return(true);
}
}
// Token: 0x06000484 RID: 1156 RVA: 0x0000DB17 File Offset: 0x0000CB17
public void CancelRequest(IRequest request, CancelCompleteEventHandler callback)
{
if (this.m_server == null)
{
throw new NotConnectedException();
}
((IServer)this.m_server).CancelRequest(request, callback);
}
public bool CancelRequest(Request request, CancelCompleteEventHandler callback)
{
lock (this)
{
if (!this.m_requests.Contains(request.RequestID))
{
return(false);
}
if (callback != null)
{
request.CancelComplete += callback;
}
else
{
this.m_requests.Remove(request.RequestID);
}
return(true);
}
}
// Token: 0x060004EB RID: 1259 RVA: 0x0000E6CA File Offset: 0x0000D6CA
public void Cancel(IRequest request, CancelCompleteEventHandler callback)
{
this.m_subscription.Cancel(request, callback);
}
/// <summary> /// Cancels the request, if possible. /// </summary> public void Cancel(CancelCompleteEventHandler callback) /*OpcGroup.Cancel(this, callback);*/ }
public void Cancel(CancelCompleteEventHandler callback)
{
this.m_subscription.Cancel(this, callback);
}
/// <summary>
/// Cancels an asynchronous read or write operation.
/// </summary>
/// <param name="request">The object returned from the BeginRead or BeginWrite request.</param>
/// <param name="callback">The function to invoke when the cancel completes.</param>
public void Cancel(IRequest request, CancelCompleteEventHandler callback)
{
throw new NotImplementedException("Cancel");
}