//======================================================================
// Write
/// <summary>
/// Writes the value, quality and timestamp for a set of items.
/// </summary>
/// <param name="items">The set of item values to write.</param>
/// <returns>The results of the write operation for each item.</returns>
public IdentifiedResult[] Write(ItemValue[] items)
{
if (items == null)
{
throw new ArgumentNullException("items");
}
if (items.Length == 0)
{
return(new Opc.IdentifiedResult[0]);
}
lock (this)
{
if (m_proxy == null)
{
throw new NotConnectedException();
}
ItemValueList list = new ItemValueList();
list.AddRange(items);
OpcXml.Da10.RequestOptions options = OpcXml.Da10.Request.GetRequestOptions(m_options.Locale, m_options.Filters);
OpcXml.Da10.WriteRequestItemList requestList = OpcXml.Da10.Request.GetItemValueList(list);
OpcXml.Da10.ReplyItemList replyList = null;
OpcXml.Da10.OPCError[] errors = null;
OpcXml.Da10.ReplyBase reply = m_proxy.Write(
options,
requestList,
false,
out replyList,
out errors);
CacheResponse(m_options.Locale, reply, errors);
ItemValueResultList valueList = OpcXml.Da10.Request.GetResultList(replyList);
if (valueList == null)
{
throw new InvalidResponseException();
}
IdentifiedResult[] results = new IdentifiedResult[valueList.Count];
for (int ii = 0; ii < valueList.Count; ii++)
{
ItemValueResult valueResult = valueList[ii];
results[ii] = new IdentifiedResult(valueResult);
results[ii].ResultID = valueResult.ResultID;
results[ii].DiagnosticInfo = valueResult.DiagnosticInfo;
}
return(results);
}
}
//======================================================================
// Read
/// <summary>
/// Reads the current values for a set of items.
/// </summary>
/// <param name="items">The set of items to read.</param>
/// <returns>The results of the read operation for each item.</returns>
public Opc.Da.ItemValueResult[] Read(Item[] items)
{
if (items == null)
{
throw new ArgumentNullException("items");
}
if (items.Length == 0)
{
return(new Opc.Da.ItemValueResult[0]);
}
lock (this)
{
if (m_proxy == null)
{
throw new NotConnectedException();
}
ItemList list = new ItemList();
list.AddRange(items);
OpcXml.Da10.RequestOptions options = OpcXml.Da10.Request.GetRequestOptions(m_options.Locale, m_options.Filters);
OpcXml.Da10.ReadRequestItemList requestList = OpcXml.Da10.Request.GetItemList(list);
OpcXml.Da10.ReplyItemList replyList = null;
OpcXml.Da10.OPCError[] errors = null;
OpcXml.Da10.ReplyBase reply = m_proxy.Read(
options,
requestList,
out replyList,
out errors);
CacheResponse(m_options.Locale, reply, errors);
ItemValueResultList valueList = OpcXml.Da10.Request.GetResultList(replyList);
if (valueList == null)
{
throw new InvalidResponseException();
}
return((ItemValueResult[])valueList.ToArray(typeof(ItemValueResult)));
}
}
