Question

假设我们有一个包含156个项目的列表，我们需要使用take和skip方法分50个批次，我已完成下面的代码，但不知道如何跳过以前的项目，如果其余代码是正确的：

var mailAccounts = mailRepo.GetAllMailAccounts();
            int total = mailAccounts.Count;
            int batch = 50;
            int batchNumbers = total / batch;
            for (int i = 0; i < batchNumbers; i++)
            {
                mailAccounts.Skip(Previous Items).Take(batch);
                await FetchEmails(mailAccounts);
            }

Answer 1

您可以轻松计算出来：

int itemsToSkip = batch * i;
mailAccounts.Skip(itemsToSkip).Take(batch);

Answer 2

for (int i = 0; i < batchNumbers; i++) {
     mailAccounts.Skip(i * batch).Take(batch);
}

Answer 3

var chunks =  mailAccount.Select((m, i) => new {m, i})
                         .GroupBy(item = item.i / 50)
                         .Select(g => g.Select(item => item.m));

foreach(var ch in chunks)
{
   var curChunk = ch.ToArray();
}

列表将某些项目跳过剩余

3 个答案: