public static async Task Lesson(DataServiceRestClient client)
{
//Create the most commonly used attributes for measurement and measurement value
var configuration = await client.GetConfiguration();
if (configuration.GetDefinition(EntityDto.Measurement, MeasurementAttributeDefinition.Key) == null)
{
await client.CreateAttributeDefinition(EntityDto.Measurement, MeasurementAttributeDefinition);
}
if (configuration.GetDefinition(EntityDto.Value, ValueAttributeDefinition.Key) == null)
{
await client.CreateAttributeDefinition(EntityDto.Value, ValueAttributeDefinition);
}
//Every measurement is attached to a part, and every value is attached to a characteristic
await client.CreateParts(new[] { Part });
await client.CreateCharacteristics(new[] { Characteristic });
//The function 'CreateMeasurements' will create measurements without any values. You'll much more likely use the 'CreateMeasurementValues' function
await client.CreateMeasurementValues(new[] { Measurement });
Value.Value = new DataValueDto(0.0) //This will result in an unmeasured characteristic, because the attribute array doesn't contain K1
{
Attributes = new AttributeDto[] { }
};
await client.UpdateMeasurementValues(new[] { Measurement });
Value.Value = new DataValueDto //this will work!
{
Attributes = new[] { new AttributeDto(ValueAttributeDefinition.Key, 0.5) }
};
await client.UpdateMeasurementValues(new[] { Measurement });
var result = await client.GetMeasurementValues(
PathInformationDto.Root, // Part where to search measurements
new MeasurementValueFilterAttributesDto
{
AggregationMeasurements = AggregationMeasurementSelectionDto.All, // Decide how to include aggregated measurements in your query
CharacteristicsUuidList = null, // Use characteristic uuids to fetch single measurement values
Deep = true, // A deep search will find measurements recursively below the start path
FromModificationDate = null, // Will only search measurements with a modification date (LastModified) newer than the specified one
ToModificationDate = null, // Will only search measurements with a modification date (LastModified) older than the specified one
LimitResult = 10, // Will limit the number of returned measurements
MeasurementUuids = null, // Use measurement uuids to search for specific measurements
OrderBy = new[] // Order the returned measurements by specific attributes
{
new OrderDto(WellKnownKeys.Measurement.Time, OrderDirectionDto.Asc, EntityDto.Measurement)
},
RequestedMeasurementAttributes = null, // Specify, which measurement attributes should be returned (default: all)
RequestedValueAttributes = null, // Specify, which value attributes should be returned (default: all)
SearchCondition = new GenericSearchAttributeConditionDto // You can create more complex attribute conditions using the GenericSearchAnd, GenericSearchOr and GenericSearchNot class
{
Attribute = WellKnownKeys.Measurement.Time, //Only measurement attributes are supported
Operation = OperationDto.GreaterThan,
Value = XmlConvert.ToString(DateTime.UtcNow - TimeSpan.FromDays(2), XmlDateTimeSerializationMode.Utc)
}
});
foreach (var measurement in result)
{
Console.WriteLine(measurement.ToString());
}
}
