public OpcGroup AddGroup(string groupName, int updateRate, bool bActive)
{
OpcGroup grp = new OpcGroup(groupName, updateRate, bActive);
// initialize arguments.
Guid iid = typeof(IOPCItemMgt).GUID;
object group = null;
int serverHandle = 0;
int revisedUpdateRate = 0;
GCHandle hDeadband = GCHandle.Alloc(grp.Deadband, GCHandleType.Pinned);
// invoke COM method.
try
{
((IOPCServer)m_server).AddGroup(
(grp.Name != null) ? grp.Name : "",
(grp.Active) ? 1 : 0,
grp.UpdateRate,
0,
IntPtr.Zero,
hDeadband.AddrOfPinnedObject(),
OpcDa.Client.Com.Interop.GetLocale(grp.Locale),
out serverHandle,
out revisedUpdateRate,
ref iid,
out group);
}
catch (Exception e)
{
throw OpcDa.Client.Com.Interop.CreateException("IOPCServer.AddGroup", e);
}
finally
{
if (hDeadband.IsAllocated)
{
hDeadband.Free();
}
}
// set the revised update rate.
if (revisedUpdateRate > grp.UpdateRate)
{
grp.UpdateRate = revisedUpdateRate;
}
// save server handle.
grp.ServerHandle = serverHandle;
// save group handle
grp.ComGroup = group;
// add group to server list
this.m_groups.Add(grp);
return(grp);
}
public void RemoveGroup(OpcGroup group)
{
// invoke COM method.
try
{
((IOPCServer)m_server).RemoveGroup((int)group.ServerHandle, 0);
}
catch (Exception e)
{
throw OpcDa.Client.Com.Interop.CreateException("IOPCServer.RemoveGroup", e);
}
this.m_groups.Remove(group);
}
/// <summary>
/// Initializes the object with the containing subscription object.
/// </summary>
public OpcCallback(object handle, int filters, OpcGroup group)
{
m_handle = handle;
m_filters = filters;
m_group = group;
}