从IList中删除项目 <Log> IList中存在log.id的位置 <short>

Question

Hi i am new to linq kindly pardon my bad keywords.

 IList<Log> pendingLogs = rep.GetAllPending();
 IList<Short> pendingMessageInQueue = PendingCommandModel.GetPendingMessagesIds();

I have two lists. I want to remove items from pendingLogs where item.Id exists in pendingMessageInQueue . I could also have used IEnumerable if that is more appropriate in this case.

Answer 1

If you want to keep your original list instead of creating a new one , you can use a simple join to get the items you want to delete:

 foreach(var log in pendingMessageInQueue.Join(pendingLogs, 
                                               (id) => id,
                                               (log) => log.Id,
                                               (id, log) => log))
{
    pendingLogs.Remove(log);
}

Answer 2

Create a new list with all items that you want to keep, you can use !Contains :

pendingLogs = pendingLogs 
    .Where(pl => !pendingMessageInQueue.Contains(pl.id))
    .ToList();