public async Task <DlVersionChangeHistoryResponse> GetDlBookChangeHistory(int bookId,
int lastDownloadedVersion,
string email,
string deviceId)
{
DlVersionChangeHistoryRequest dlVersionChangeHistory = new DlVersionChangeHistoryRequest
{
DeviceId = deviceId,
DlId = bookId,
Email = email,
Ver = lastDownloadedVersion
};
var changeHistoryResult = await deliveryService.DlVersionChangeHistory(dlVersionChangeHistory);
DlVersionChangeHistoryResponse dlBookChangeHistory = null;
if (changeHistoryResult.IsSuccess)
{
dlBookChangeHistory = JsonConvert.DeserializeObject <DlVersionChangeHistoryResponse>(changeHistoryResult.Content);
}
return(dlBookChangeHistory);
}