if your "Container" class is properly setup/has all the properties or controls you need to get the information you want, then i believe what you are looking for is this:
if (myCellControl is Container)
{
Container tmp = myCellControl as Container;
//after this point, you can reference the controls/properties of your
//Container class/control using tmp... see example below as i do not know
//what your Container control exposes as far as properties are concerned.
Adapter.insertposition(RackID, row, col, tmp.ChannelValue, "Ready");
}