/// <summary>
/// Writes the value of the specified item property.
/// </summary>
public Opc.IdentifiedResult Write(
string itemID,
PropertyID propertyID,
Opc.Da.ItemValue value)
{
lock (this)
{
// lookup item.
DeviceItem item = (DeviceItem)m_items[itemID];
if (item == null)
{
return(new IdentifiedResult(itemID, ResultID.Da.E_UNKNOWN_ITEM_NAME));
}
// write value.
return(item.Write(propertyID, value));
}
}
/// <summary>
/// Reads a browse element from the XML stream.
/// </summary>
private void ReadElement(XmlTextReader reader, string browsePath)
{
string itemID = (browsePath == null)?"":browsePath + "/";
if (reader.MoveToAttribute(ELEMENT_NAME))
{
itemID += reader.Value;
}
reader.ReadStartElement(BROWSE_ELEMENT);
// create item.
if (reader.IsStartElement(ITEM))
{
DeviceItem item = new DeviceItem(itemID);
if (item.Initialize(reader))
{
m_items[itemID] = item;
m_itemList.Add(item);
}
}
// read child elements.
if (reader.IsStartElement(CHILDREN))
{
reader.ReadStartElement();
while (reader.IsStartElement(BROWSE_ELEMENT))
{
ReadElement(reader, itemID);
}
reader.ReadEndElement();
}
reader.ReadEndElement();
}
