public void Get()
{
// Creating a request object
var requestObj = new MsgMeas.GetObservationRequest();
// Setting the conditions of the request
requestObj.FeaturesOfInterest.Add("myplant/myprocess/mytemperature");
// Adding a data record; use this to whatever additional parameters you need.
// This naturally depends on the server.
var extensionObj = new MsgMeas.Item_DataRecord()
{
{ "parameter_x", new MsgMeas.Item_Count(3) }
};
requestObj.Items.Add(extensionObj);
// Adding a temporal filter: retrieve all observation after given time
var tempFilter1 = new MsgMeas.TemporalFilter(
MsgMeas.TemporalFilter.ValueReferenceType.PhenomenonTime,
MsgMeas.TemporalFilter.OperatorType.After,
new MsgMeas.Item_TimeInstant(DateTime.Parse("2018-05-18T08:05:44Z").ToUniversalTime())
);
requestObj.TemporalFilters.Add(tempFilter1);
// Serialising the request object
byte[] requestXml = requestObj.ToXmlBytes();
// Sending the requestXml to the server and waiting for a response...
SendRequest(requestXml);
byte[] responseXml = WaitForResponse();
// Processing the response
MsgMeas.GetObservationResponse responseObj;
try
{
responseObj = new MsgMeas.GetObservationResponse(responseXml);
}
catch (MsgMeas.Neutral.InvalidMessageException e)
{
throw new InvalidOperationException("Failed to read server response: " + e.Message, e);
}
if (responseObj.RequestResult != MsgMeas.RequestResultType.Ok)
{
throw new InvalidOperationException("Unexpected response from server");
}
foreach (var obs in responseObj.Observations)
{
// Processing the observations...
// ...
}
}
private void ReadFieldValuesFromXmlDoc(XsdNs.GetObservationType requestObjectRaw)
{
// Reading features of interest
if (requestObjectRaw.featureOfInterest != null && requestObjectRaw.featureOfInterest.Length > 0)
{
FeaturesOfInterest = new HashSet <string>(requestObjectRaw.featureOfInterest);
}
// Reading observed properties
if (requestObjectRaw.observedProperty != null && requestObjectRaw.observedProperty.Length > 0)
{
ObservedProperties = new HashSet <string>(requestObjectRaw.observedProperty);
}
// Reading extensions
if (requestObjectRaw.extension != null)
{
foreach (var ext in requestObjectRaw.extension)
{
if (ext.GetType() != typeof(XsdNs.DataRecordPropertyType))
{
throw new XNeut.InvalidMessageException("The type of the extension object is not supported: " + ext.GetType().ToString());
}
var dataRecordRaw = (XsdNs.DataRecordPropertyType)ext;
Items.Add(new Item_DataRecord(dataRecordRaw.DataRecord));
}
}
// Reading temporal filters
if (requestObjectRaw.temporalFilter != null)
{
foreach (var filterEl in requestObjectRaw.temporalFilter)
{
var filterObj = new TemporalFilter(filterEl);
TemporalFilters.Add(filterObj);
}
}
}
