private async Task<CloudAppendBlob> GetBlobAsync(DateTime eventTime)
{
string tagName = eventTime.ToString("yyyy-MM-dd");
if (tagName != _currentTagName)
{
_currentTagName = tagName;
_appendBlob = _blobContainer.GetAppendBlobReference($"{_blobNamePrefix}{_currentTagName}.txt");
if (!(await _appendBlob.ExistsAsync()))
{
await _appendBlob.CreateOrReplaceAsync();
}
}
return _appendBlob;
}
private static async Task<List<FileRecord>> ReadStreamToRecords(CloudAppendBlob blob)
{
List<FileRecord> records = new List<FileRecord>();
using (var s = new MemoryStream())
{
if (!await blob.ExistsAsync())
{
return records;
}
await blob.DownloadRangeToStreamAsync(s, 0, blob.Properties.Length);
s.Position = 0;
var reader = new BinaryReader(s);
var record = new FileRecord();
while (record.ReadContentFromStream(reader))
{
records.Add(record);
record = new FileRecord();
}
}
return records;
}