/// <summary>
/// Handles a method call.
/// </summary>
private ServiceResult DoGenerateRandomValues(
ISystemContext context,
MethodState method,
IList <object> inputArguments,
IList <object> outputArguments)
{
ComDaClientManager system = (ComDaClientManager)this.SystemContext.SystemHandle;
ComDaClient client = system.SelectClient((ServerSystemContext)context, false);
Opc.Ua.Test.DataGenerator generator = new Opc.Ua.Test.DataGenerator(null);
IDaElementBrowser browser = client.CreateBrowser((string)method.Handle);
// create write requests.
WriteRequestCollection requests = new WriteRequestCollection();
try
{
for (DaElement element = browser.Next(); element != null; element = browser.Next())
{
if (element.ElementType == DaElementType.Branch)
{
continue;
}
// generate a random value of the correct data tyoe.
bool isArray = false;
NodeId dataTypeId = ComUtils.GetDataTypeId(element.DataType, out isArray);
object value = generator.GetRandom(
dataTypeId,
(isArray)?ValueRanks.OneDimension:ValueRanks.Scalar,
null,
context.TypeTable);
// create a request.
requests.Add(new Opc.Ua.Com.Client.WriteRequest(element.ItemId, new DataValue(new Variant(value)), 0));
}
}
finally
{
browser.Dispose();
}
// write values.
client.Write(requests);
return(ServiceResult.Good);
}
/// <summary>
/// Finds the item id for the parent of the element.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <returns>The item id for the parent of the element.</returns>
public string FindElementParentId(string itemId)
{
if (String.IsNullOrEmpty(itemId))
{
return(null);
}
// check in cache.
DaElement element = null;
lock (m_cache)
{
if (m_cache.TryGetValue(itemId, out element))
{
if (element.ParentId != null)
{
return(element.ParentId);
}
}
}
// try extracting the name by parsing the item id.
string name = null;
string parentId = null;
if (ParseItemId(itemId, out name, out parentId))
{
element = CreateElement(itemId, name, parentId);
}
// need to do it the hard way by searching the address space.
else
{
IDaElementBrowser browser = CreateBrowser(itemId);
element = browser.Find(itemId, false);
browser.Dispose();
}
// save element in the cache.
if (element != null)
{
SaveElementInCache(element);
}
return(element.ParentId);
}