/// <summary>
/// Reads the attribute values from the server.
/// </summary>
/// <param name="valuesToRead">The values to read.</param>
/// <returns>
/// The values read.
/// </returns>
public DaValue[] Read(ReadValueIdCollection valuesToRead)
{
TraceState("Read", valuesToRead.Count);
// check for valid session.
Session session = m_session;
if (session == null)
{
throw ComUtils.CreateComException(ResultIds.E_FAIL);
}
int masterError = ResultIds.E_FAIL;
DaValue[] results = new DaValue[valuesToRead.Count];
if (session != null)
{
try
{
// read the values.
DataValueCollection values = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Read(
null,
0,
TimestampsToReturn.Both,
valuesToRead,
out values,
out diagnosticInfos);
ClientBase.ValidateResponse(values, valuesToRead);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, valuesToRead);
// convert the response.
for (int ii = 0; ii < values.Count; ii++)
{
results[ii] = m_mapper.GetLocalDataValue(values[ii]);
}
// return the results.
return(results);
}
catch (Exception e)
{
masterError = ComUtils.GetErrorCode(e, ResultIds.E_FAIL);
}
}
// report any unexpected errors.
for (int ii = 0; ii < results.Length; ii++)
{
DaValue result = results[ii] = new DaValue();
result.Error = masterError;
}
return(results);
}
/// <summary>
/// Reads the attribute values from the server.
/// </summary>
/// <param name="valuesToWrite">The values to write.</param>
/// <returns>The results.</returns>
public int[] Write(WriteValueCollection valuesToWrite)
{
TraceState("Write", valuesToWrite.Count);
// check for valid session.
Session session = m_session;
if (session == null)
{
throw ComUtils.CreateComException(ResultIds.E_FAIL);
}
int masterError = ResultIds.E_FAIL;
int[] errors = new int[valuesToWrite.Count];
if (session != null)
{
try
{
// write the values.
StatusCodeCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Write(
null,
valuesToWrite,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, valuesToWrite);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, valuesToWrite);
// convert the response.
for (int ii = 0; ii < results.Count; ii++)
{
errors[ii] = ComDaProxy.MapWriteStatusToErrorCode(valuesToWrite[ii].Value, results[ii]);
}
// return the results.
return(errors);
}
catch (Exception e)
{
masterError = ComUtils.GetErrorCode(e, ResultIds.E_FAIL);
}
}
// report any unexpected errors.
for (int ii = 0; ii < errors.Length; ii++)
{
errors[ii] = masterError;
}
return(errors);
}
/// <summary>
/// Writes the values for the specified item ids.
/// </summary>
/// <param name="itemIds">The item ids.</param>
/// <param name="values">The values.</param>
/// <returns>The results.</returns>
public int[] Write(string[] itemIds, DaValue[] values)
{
int[] results = new int[itemIds.Length];
WriteValueCollection valuesToWrite = new WriteValueCollection();
ComDaReadPropertiesRequest[] requests = new ComDaReadPropertiesRequest[values.Length];
// prepare request.
for (int ii = 0; ii < itemIds.Length; ii++)
{
ComDaReadPropertiesRequest request = requests[ii] = new ComDaReadPropertiesRequest();
request.ItemId = itemIds[ii];
}
// need to get the data type of the remote node.
m_browseManager.GetPropertyValues(Session, requests, PropertyIds.UaBuiltInType, PropertyIds.UaValueRank);
// validate items.
for (int ii = 0; ii < requests.Length; ii++)
{
ComDaReadPropertiesRequest request = requests[ii];
if (request.Error < 0)
{
results[ii] = request.Error;
continue;
}
int?builtInType = request.Values[0].Value as int?;
int?valueRank = request.Values[1].Value as int?;
if (builtInType == null || valueRank == null)
{
results[ii] = ResultIds.E_UNKNOWNITEMID;
continue;
}
// convert value to UA data type.
WriteValue valueToWrite = new WriteValue();
valueToWrite.NodeId = m_mapper.GetRemoteNodeId(itemIds[ii]);
valueToWrite.AttributeId = Attributes.Value;
valueToWrite.Handle = ii;
// convert value to UA data type.
try
{
TypeInfo remoteType = new TypeInfo((BuiltInType)builtInType.Value, valueRank.Value);
valueToWrite.Value = m_mapper.GetRemoteDataValue(values[ii], remoteType);
}
catch (Exception e)
{
results[ii] = ComUtils.GetErrorCode(e, ResultIds.E_BADTYPE);
continue;
}
valuesToWrite.Add(valueToWrite);
}
// check if nothing to do.
if (valuesToWrite.Count == 0)
{
return(results);
}
// write the values to the server.
int[] remoteResults = m_groupManager.Write(valuesToWrite);
// copy results.
for (int ii = 0; ii < valuesToWrite.Count; ii++)
{
results[(int)valuesToWrite[ii].Handle] = remoteResults[ii];
}
return(results);
}