//取消订阅函数，目前仅wsq支持订阅
public void cancelRequest(ulong requestID)
{
if (requestID == 0)
{
foreach (ulong rid in ReqList.Keys)
{
wdc.cancelRequest(rid);
}
ReqList.Clear();
}
if (ReqList.ContainsKey(requestID))
{
wdc.cancelRequest(requestID);
ReqList.Remove(requestID);
}
return;
}