C# 带参数的Cosmosdb documentdb Sql查询返回0项

我有一个疑问。当我传递单个参数deviceId时，查询工作正常。如果添加其他两个参数，则即使集合已正确填充且具有满足所需条件的项，也不会向我返回任何项。 我附上代码c，它完成上述操作

 public static async Task<IEnumerable<T>> GetItemsCompact(string deviceId,DateTime startdate,DateTime enddate)
        {
            string collectionToUse;
            SqlQuerySpec sqlQuerySpec = new SqlQuerySpec();

            if (typeof(T).ToString().IndexOf("Telemetry") != -1)
            {
                DocumentDBRepository<EBB.Web.Telemerty.Models.CosmosDBTelemetry>.Initialize();
                collectionToUse = AppSettings.Collection;

                sqlQuerySpec.QueryText = "SELECT c.messageUID as messageUID, ";
                sqlQuerySpec.QueryText += "c.deviceId as deviceId, ";
                sqlQuerySpec.QueryText += "udf.UDF_VIn(c.VIn) as VIn, ";
                sqlQuerySpec.QueryText += "udf.UDF_AIn(c.AIn) as AIn, ";
                sqlQuerySpec.QueryText += "udf.UDF_W(c.W) as W, ";
                sqlQuerySpec.QueryText += "udf.UDF_Var(c.Var) as Var, ";
                sqlQuerySpec.QueryText += "c.EventProcessedUtcTime as EventProcessedUtcTime ";
                sqlQuerySpec.QueryText += "from Telemetry c ";
                sqlQuerySpec.QueryText += "where c.deviceId = @deviceId and ";
                sqlQuerySpec.QueryText += "c.EventProcessedUtcTime >= @startdate and ";
                sqlQuerySpec.QueryText += "c.EventProcessedUtcTime <= @enddate";
                sqlQuerySpec.Parameters = new SqlParameterCollection()
                    {
                          new SqlParameter("@deviceId", deviceId),
                          new SqlParameter("@startdate",startdate),
                          new SqlParameter("@enddate",enddate)
                    };

            }
            else
            {
                DocumentDBRepository<EBB.Web.Telemerty.Models.CosmosDBEvents>.Initialize();
                collectionToUse = AppSettings.Collection2;
                sqlQuerySpec.QueryText = "select doc.uid as uid, ";
                sqlQuerySpec.QueryText += "doc.deviceId as deviceId, ";
                sqlQuerySpec.QueryText += "doc.eventId as eventId, ";
                sqlQuerySpec.QueryText += "doc.ts as ts, ";
                sqlQuerySpec.QueryText += "doc.startTS as startTS, ";
                sqlQuerySpec.QueryText += "doc.endTS as endTS, ";
                sqlQuerySpec.QueryText += "doc.no as no, ";
                sqlQuerySpec.QueryText += "doc.params as params, ";
                sqlQuerySpec.QueryText += "doc.tags as tags ";
                sqlQuerySpec.QueryText += "from Events doc ";
                sqlQuerySpec.QueryText += "where doc.deviceId = @deviceId and ";
                sqlQuerySpec.QueryText += "doc.EventProcessedUtcTime >= @startdate and ";
                sqlQuerySpec.QueryText += "doc.EventProcessedUtcTime <= @enddate";
                sqlQuerySpec.Parameters = new SqlParameterCollection()
                    {
                          new SqlParameter("@deviceId", deviceId),
                          new SqlParameter("@startdate",startdate),
                          new SqlParameter("@enddate",enddate)
                    };
            }

            FeedOptions opt = new FeedOptions
            {
                EnableCrossPartitionQuery = true,
                MaxItemCount = -1
            };

            IDocumentQuery<T> query = client.CreateDocumentQuery<T>(
                    UriFactory.CreateDocumentCollectionUri(AppSettings.Database, collectionToUse), sqlQuerySpec,
                    opt).AsDocumentQuery();

            List<T> results = new List<T>();

            while (query.HasMoreResults)
            {
                results.AddRange(await query.ExecuteNextAsync<T>());
            }

            return results;
         }

遥测情况下的query.toSting等于：

    "{\"query\":\"SELECT c.messageUID as messageUID, c.deviceId as deviceId, udf.UDF_VIn(c.VIn) as VIn, udf.UDF_AIn(c.AIn) as AIn, udf.UDF_W(c.W) as W, udf.UDF_Var(c.Var) as Var, c.EventProcessedUtcTime as EventProcessedUtcTime from Telemetry c where c.deviceId = @deviceId and c.EventProcessedUtcTime >= @startdate and c.EventProcessedUtcTime <= @enddate\",\"parameters\":[{\"name\":\"@deviceId\",\"value\":\"where c.deviceId = \\\"EBBBrain1874008291\\\"\"},{\"name\":\"@startdate\",\"value\":\"2019-06-01T00:00:00\"},{\"name\":\"@enddate\",\"value\":\"2019-06-30T00:00:00\"}]}"

---

有人能帮我吗？提前谢谢。Simone

问题是由于参数中的属性序列化引起的。当您使用UTC创建文档时，但当您进行查询时，SDK认为DateTime的DateTimeKind未指定，这是有效的，因此它将其转换为未指定的格式2019-06-30T00:00:00，而不是UTC 2019-05-31T14:58:15.3238226Z。如果你使用了DateTime之类的东西，现在它将使用本地格式，看起来像这样的2009-06-15T13:45:30.0000000-07:00。无法返回任何结果的原因是，日期范围检查最终是一个字符串比较，由ISO格式启用

要使其正常工作，需要使用DateTime.SpecifyKind方法。以下是parameters子句的外观：

sqlQuerySpec.Parameters = new SqlParameterCollection()
{
      new SqlParameter("@deviceId", deviceId),
      new SqlParameter("@startdate", DateTime.SpecifyKind(startdate, DateTimeKind.Utc)),
      new SqlParameter("@enddate", DateTime.SpecifyKind(enddate, DateTimeKind.Utc))
};

---

正在运行的参数是deviceId，日期是失败的吗？@Nick:是的，日期是失败的，deviceId正在运行。请在CreateDocumentQuery行之后进行查询。ToString调用？这将向我们展示查询是如何形成和执行的。我怀疑有连载inconsistency@NIck：我输入了post query.ToString结果。好的，现在您可以给我们展示一些数据库中EventProcessedutTime字段的示例吗？使用您建议的符号，我得到了相同的结果。返回零项能否检查最终查询的外观？我将其添加到Post中。此外，由于括号中的空字符串不被接受，指令deviceId.ToString生成异常。@SimoneSpagna抱歉，我意外添加了ToString内容。我测试了粘贴在这里的代码，效果很好。