public async Task <ProcessValues> ReadProcessDataAsync(DatanodeQueryCriteria criteria, CancellationToken cancellationToken = default(CancellationToken))
{
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
string uri = String.Format(ReadDataResourceFormat, criteria.DeviceId, Uri.EscapeUriString(String.Join(",", criteria.Datanodes)));
if (criteria.SortOrder != DatanodeQueryCriteria.Order.Unset)
{
uri += String.Format("&order={0}", criteria.SortOrder.ToString().ToLower());
}
if (criteria.StartDate.HasValue)
{
uri += "&fromdate=" + criteria.StartDate.Value.ToUnixTime();
}
if (criteria.EndDate.HasValue)
{
uri += "&todate=" + criteria.EndDate.Value.ToUnixTime();
}
if (criteria.Count.HasValue)
{
uri += "&limit=" + criteria.Count.Value;
}
using (var response = await _client.HandledGetAsync(uri, cancellationToken))
{
var processValues = await JsonSerializer.DeserializeAsync <ProcessValues>(response.Content);
return(processValues);
}
}
public void ReadProcessData_NoCancellationToken_ResultsReturned()
{
var criteria = new DatanodeQueryCriteria(DeviceId, "MyTestDatapoint")
{
Count = 5,
StartDate = DateTime.Now.AddDays(-7),
EndDate = DateTime.Now,
SortOrder = DatanodeQueryCriteria.Order.Descending
};
var processData = _client.ReadProcessDataAsync(criteria).Result;
Assert.IsNotNull(processData);
Assert.IsNotNull(processData.Datanodes);
Assert.IsNotNull(processData.Datanodes.First());
Assert.IsTrue(processData.Datanodes.First().Values.Any());
Assert.AreNotEqual(DateTime.MinValue, processData.Datanodes.First().Values.First().Timestamp);
Assert.AreNotEqual(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc), processData.Datanodes.First().Values.First().Timestamp);
Assert.IsNotNull(DateTime.MinValue, processData.Datanodes.First().Values.First().StringValue);
}