在Windows Azure表存储中批量删除

我试图删除WADLogsTable中2个日期(即2个分区键)之间的所有实体。到目前为止，我找到的最好的代码是这个(来自https://www.wintellect.com/deleting-entities-in-windows-azure-table-storage):

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private static void DeleteAllEntitiesInBatches(CloudTable table, Expression<Func<DynamicTableEntity, bool>> filters)
        {
            Action<IEnumerable<DynamicTableEntity>> processor = entities =>
            {
                var batches = new Dictionary<string, TableBatchOperation>();
                foreach (var entity in entities)
                {
                    TableBatchOperation batch = null;
                    if (batches.TryGetValue(entity.PartitionKey, out batch) == false)
                    {
                        batches[entity.PartitionKey] = batch = new TableBatchOperation();
                    }
                    batch.Add(TableOperation.Delete(entity));
                    if (batch.Count == 100)
                    {
                        table.ExecuteBatch(batch);
                        batches[entity.PartitionKey] = new TableBatchOperation();
                    }
                }
                foreach (var batch in batches.Values)
                {
                    if (batch.Count > 0)
                    {
                        table.ExecuteBatch(batch);
                    }
                }
            };
            ProcessEntities(table, processor, filters);
        }
        private static void ProcessEntities(CloudTable table, Action<IEnumerable<DynamicTableEntity>> processor, Expression<Func<DynamicTableEntity, bool>> filters)
        {
            TableQuerySegment<DynamicTableEntity> segment = null;
            while (segment == null || segment.ContinuationToken != null)
            {
                if (filters == null)
                {
                    segment = table.ExecuteQuerySegmented(new TableQuery().Take(100), segment == null ? null : segment.ContinuationToken);
                }
                else
                {
                    var query = table.CreateQuery<DynamicTableEntity>().Where(filters).Take(100).AsTableQuery();
                    segment = query.ExecuteSegmented(segment == null ? null : segment.ContinuationToken);
                }
                processor(segment.Results);
            }
        }

但是我不知道应该传递什么作为"过滤器"参数。我想出了这个相当幼稚的尝试:

Expression<Func<DynamicTableEntity, bool>> filters = e => long.Parse(e.PartitionKey) >= startTicks && long.Parse(e.PartitionKey) <= endTicks;

但这不起作用。在运行时，我得到以下错误:

表达式((Parse([10007].PartitionKey)>= 635109048000000000)并且(Parse([10007].PartitionKey) <= 635115960000000000))不是支持。

我不知道我的问题是否与Azure表或表达式有关，但任何帮助都会很感激。

编辑:如果需要，我很乐意提供更多信息。

var startTicks = string.Format("{0:0000000000000000000}", start);
var endTicks = string.Format("{0:0000000000000000000}", end);
Expression<Func<DynamicTableEntity, bool>> filters = e => e.PartitionKey.CompareTo(startTicks) >= 0 && e.PartitionKey.CompareTo(endTicks) <= 0;