C# (CSharp) TestData HistoryDataReader.BeginReadRaw Beispiele

BeginReadRaw() public method

Starts reading raw values.

public BeginReadRaw ( ServerSystemContext context, ReadRawModifiedDetails request, TimestampsToReturn timestampsToReturn, NumericRange indexRange, Opc.Ua.QualifiedName dataEncoding, DataValueCollection values ) : void
context	Opc.Ua.Server.ServerSystemContext	The context for the operation.
request	ReadRawModifiedDetails	The request parameters.
timestampsToReturn	TimestampsToReturn	The timestamps to return with the value.
indexRange	Opc.Ua.NumericRange	The range to return for array values.
dataEncoding	Opc.Ua.QualifiedName	The data encoding to use for structured values.
values	DataValueCollection	The values to return.
return	void

Beispiel #1

Datei: TestDataNodeManager.cs Projekt: KadriUmay/UA-.UWP-Universal-Windows-Platform-1

        /// <summary>
        /// Reads the raw data for a variable
        /// </summary>
        protected ServiceResult HistoryReadRaw(
            ISystemContext context,
            BaseVariableState source,
            ReadRawModifiedDetails details,
            TimestampsToReturn timestampsToReturn,
            bool releaseContinuationPoints,
            HistoryReadValueId nodeToRead,
            HistoryReadResult result)
        {
            ServerSystemContext serverContext = context as ServerSystemContext;

            HistoryDataReader reader = null;
            HistoryData       data   = new HistoryData();

            if (nodeToRead.ContinuationPoint != null && nodeToRead.ContinuationPoint.Length > 0)
            {
                // restore the continuation point.
                reader = RestoreDataReader(serverContext, nodeToRead.ContinuationPoint);

                if (reader == null)
                {
                    return(StatusCodes.BadContinuationPointInvalid);
                }

                // node id must match previous node id.
                if (reader.VariableId != nodeToRead.NodeId)
                {
                    Utils.SilentDispose(reader);
                    return(StatusCodes.BadContinuationPointInvalid);
                }

                // check if releasing continuation points.
                if (releaseContinuationPoints)
                {
                    Utils.SilentDispose(reader);
                    return(ServiceResult.Good);
                }
            }
            else
            {
                // get the source for the variable.
                IHistoryDataSource datasource = null;
                ServiceResult      error      = GetHistoryDataSource(serverContext, source, out datasource);

                if (ServiceResult.IsBad(error))
                {
                    return(error);
                }

                // create a reader.
                reader = new HistoryDataReader(nodeToRead.NodeId, datasource);

                // start reading.
                reader.BeginReadRaw(
                    serverContext,
                    details,
                    timestampsToReturn,
                    nodeToRead.ParsedIndexRange,
                    nodeToRead.DataEncoding,
                    data.DataValues);
            }

            // continue reading data until done or max values reached.
            bool complete = reader.NextReadRaw(
                serverContext,
                timestampsToReturn,
                nodeToRead.ParsedIndexRange,
                nodeToRead.DataEncoding,
                data.DataValues);

            // save continuation point.
            if (!complete)
            {
                SaveDataReader(serverContext, reader);
                result.StatusCode = StatusCodes.GoodMoreData;
            }

            // return the dat.
            result.HistoryData = new ExtensionObject(data);

            return(result.StatusCode);
        }

Beispiel #2

Datei: TestDataNodeManager.cs Projekt: OPCFoundation/UA-.NETStandardLibrary

        /// <summary>
        /// Reads the raw data for a variable
        /// </summary>
        protected ServiceResult HistoryReadRaw(
            ISystemContext context, 
            BaseVariableState source, 
            ReadRawModifiedDetails details, 
            TimestampsToReturn timestampsToReturn, 
            bool releaseContinuationPoints, 
            HistoryReadValueId nodeToRead, 
            HistoryReadResult result)
        {
            ServerSystemContext serverContext = context as ServerSystemContext;

            HistoryDataReader reader = null;
            HistoryData data = new HistoryData();

            if (nodeToRead.ContinuationPoint != null && nodeToRead.ContinuationPoint.Length > 0)
            {
                // restore the continuation point.
                reader = RestoreDataReader(serverContext, nodeToRead.ContinuationPoint);

                if (reader == null)
                {
                    return StatusCodes.BadContinuationPointInvalid;
                }

                // node id must match previous node id.
                if (reader.VariableId != nodeToRead.NodeId)
                {
                    Utils.SilentDispose(reader);
                    return StatusCodes.BadContinuationPointInvalid;
                }

                // check if releasing continuation points.
                if (releaseContinuationPoints)
                {
                    Utils.SilentDispose(reader);
                    return ServiceResult.Good;
                }
            }
            else
            {
                // get the source for the variable.
                IHistoryDataSource datasource = null;
                ServiceResult error = GetHistoryDataSource(serverContext, source, out datasource);

                if (ServiceResult.IsBad(error))
                {
                    return error;
                }

                // create a reader.
                reader = new HistoryDataReader(nodeToRead.NodeId, datasource);
                
                // start reading.
                reader.BeginReadRaw(
                    serverContext, 
                    details, 
                    timestampsToReturn, 
                    nodeToRead.ParsedIndexRange,
                    nodeToRead.DataEncoding,
                    data.DataValues);
            }
     
            // continue reading data until done or max values reached.
            bool complete = reader.NextReadRaw(
                serverContext, 
                timestampsToReturn, 
                nodeToRead.ParsedIndexRange,
                nodeToRead.DataEncoding,
                data.DataValues);

            // save continuation point.
            if (!complete)
            {
                SaveDataReader(serverContext, reader);
                result.StatusCode = StatusCodes.GoodMoreData;
            }

            // return the dat.
            result.HistoryData = new ExtensionObject(data);
            
            return result.StatusCode;
        }