public IEnumerable<MsgItem> Get(Guid? id)
{
Queue<MsgItem> msgs;
try
{
msgs = cache.Get<Queue<MsgItem>>(MsgKey) ?? new Queue<MsgItem>();
}
catch (Exception)
{
msgs = new Queue<MsgItem>();
}
//判断当前请求Id在不在缓存对列中
//if (msgs.AsEnumerable<MsgItem>().Where(m => m.Id == id).Count() > 0)
int index = (id == null) ? -1 : msgs.Select(m => m.Id).ToList().IndexOf(id.Value);
if (index != -1)
{
return msgs.Skip(index + 1).Take(50 - index).AsEnumerable();
}
//不在则返回缓存中最新的10条记录
else
{
int _startIndex = msgs.Count <= DefaultMsgLength ? 0 : msgs.Count - DefaultMsgLength;
return msgs.Skip(_startIndex).Take(DefaultMsgLength).AsEnumerable();
}
}
