/// <summary>
/// 删除UserId相关的附件
/// </summary>
/// <param name="userId">上传者Id</param>
public virtual void DeletesByUserId(long userId)
{
IEnumerable <T> attachments = GetsByUserId(userId);
foreach (var attachment in attachments)
{
DeleteStoredFile(attachment);
}
string tenantTypeId = this.TenantAttachmentSettings.TenantTypeId;
attachmentRepository.DeletesByUserId(tenantTypeId, userId);
}