//附加组到服务器执行的操作
internal void AttachToServer(SHHOPCServer server)
{
try
{
this.Server = server;
OPCServerState serverState = (OPCServerState)(server.OPCServer.ServerState);
if (serverState != OPCServerState.OPCDisconnected)
{
//OPC服务对象
_opcGroup = server.OPCServer.OPCGroups.Add(this.Name);
_opcGroup.TimeBias = TimeBias;
_opcGroup.UpdateRate = UpdateRate;
_opcGroup.IsActive = IsActive;
_opcGroup.IsSubscribed = IsSubscribed;
_opcGroup.DeadBand = DeadBend;
_opcGroup.DataChange += OPCGroup_DataChange; //测点值改变(一般是事件订阅触发)
_opcGroup.AsyncReadComplete += OPCGroup_AsyncReadComplete; //异步读成功
_opcGroup.AsyncWriteComplete += OPCGroup_AsyncWriteComplete; //异步写成功
_opcGroup.AsyncCancelComplete += OPCGroup_AsyncCancelComplete; //异步取消成功
//重新注册子项
for (int i = 0; i < ItemList.Count; i++)
{
ItemList[i].DetachFromGroup(this);
ItemList[i].AttachToGroup(this);
}
}
//Server = null;
}
catch
{ }
}
//从服务器分离执行的操作
internal void DetachFromServer(SHHOPCServer server)
{
try
{
if (server.OPCServer.OPCGroups != null && _opcGroup != null)
{
//取消事件
_opcGroup.DataChange -= OPCGroup_DataChange; //测点值改变(一般是事件订阅触发)
_opcGroup.AsyncReadComplete -= OPCGroup_AsyncReadComplete; //异步读成功
_opcGroup.AsyncWriteComplete -= OPCGroup_AsyncWriteComplete; //异步写成功
_opcGroup.AsyncCancelComplete -= OPCGroup_AsyncCancelComplete; //异步取消成功
server.OPCServer.OPCGroups.Remove(this.Name); //从OPC通讯中移除
}
_opcGroup = null;
}
catch
{ }
}