public Task<HRESULT[]> Start(IList<OpcDaItem> items, OPCITEMVQT[] vqt, CancellationToken token)
{
try
{
var serverHandles = ArrayHelpers.GetServerHandles(items);
HRESULT[] ppErrors;
int cancelId = _asyncIO3.WriteVQT(serverHandles, vqt, TransactionId, out ppErrors);
if (ppErrors.All(e => e.Failed)) // if all errors no callback will take place
{
_requestManager.CompleteRequest(TransactionId);
_tcs.SetResult(ppErrors);
}
else
{
CancellationId = cancelId;
RequestHelpers.SetCancellationHandler(token, Cancel);
}
return Task;
}
catch (Exception ex)
{
_requestManager.CompleteRequest(TransactionId);
_tcs.SetException(ex);
return Task;
}
}
public HRESULT[] WriteVQT(IList<string> itemIds, IList<OpcDaVQT> values)
{
if (itemIds.Count != values.Count)
throw new ArgumentException("Invalid size of values", "values");
var vqts = new OPCITEMVQT[values.Count];
for (int i = 0; i < values.Count; i++)
{
OpcDaVQT opcItemValue = values[i];
vqts[i].bQualitySpecified = false;
if (opcItemValue.Quality != short.MinValue)
{
vqts[i].bQualitySpecified = true;
vqts[i].wQuality = opcItemValue.Quality;
}
vqts[i].bTimeStampSpecified = false;
if (opcItemValue.Timestamp != DateTimeOffset.MinValue)
{
vqts[i].bTimeStampSpecified = true;
vqts[i].ftTimeStamp = FileTimeConverter.ToFileTime(opcItemValue.Timestamp);
}
vqts[i].vDataValue = opcItemValue.Value;
}
string[] pszItemIDs = itemIds.ToArray();
var ppErrors = new HRESULT[pszItemIDs.Length];
DoComCall(ComObject, "IOPCItemIO::WriteVQT",
() => ComObject.WriteVQT(pszItemIDs.Length, pszItemIDs, vqts, out ppErrors), pszItemIDs.Length, pszItemIDs);
return ppErrors;
}
public HRESULT[] WriteVQT(int[] serverHandles, OPCITEMVQT[] vqts)
{
return DoComCall(ComObject, "IOpcSyncIO2::WriteVQT", () =>
{
HRESULT[] ppErrors;
ComObject.WriteVQT(serverHandles.Length, serverHandles, vqts, out ppErrors);
return ppErrors;
}, serverHandles.Length, serverHandles, vqts);
}
public static OPCITEMVQT[] CreateOpcItemVQT(IList<OpcDaVQT> values)
{
var vqts = new OPCITEMVQT[values.Count];
for (int i = 0; i < values.Count; i++)
{
OpcDaVQT value = values[i];
vqts[i].bQualitySpecified = false;
if (value.Quality != short.MinValue)
{
vqts[i].bQualitySpecified = true;
vqts[i].wQuality = value.Quality;
}
vqts[i].bTimeStampSpecified = false;
if (value.Timestamp != DateTimeOffset.MinValue)
{
vqts[i].bTimeStampSpecified = true;
vqts[i].ftTimeStamp = FileTimeConverter.ToFileTime(value.Timestamp);
}
vqts[i].vDataValue = value.Value;
}
return vqts;
}
public int WriteVQT(int[] serverHandles, OPCITEMVQT[] vqts, int transactionId, out HRESULT[] errors)
{
var _errors = new HRESULT[serverHandles.Length];
int result = DoComCall(ComObject, "IOpcAsyncIO3::WriteVQT", () =>
{
int dwCancelId;
ComObject.WriteVQT(serverHandles.Length, serverHandles, vqts, transactionId, out dwCancelId, out _errors);
return dwCancelId;
}, serverHandles, vqts, transactionId);
errors = _errors;
return result;
}
