protected void Page_Load(object sender, EventArgs e)
{
    long recordCount, pageCount;
    var paged = GetData(30, p,x=>true, x => x.id, out recordCount, out pageCount);
    d1 = DateTime.Now;
    list.DataSource = paged;
    list.DataBind();
    Response.Write("计时：" + (DateTime.Now - d1).TotalMilliseconds + "ms<br />");
}
private IQueryable<kaoqin_bak> GetData(
    int _pageSize, int _pageIndex, 
    Func<kaoqin_bak,bool> where,
    Func<kaoqin_bak, int> order, 
    out long _recordCount, out long _pageCount)
{
    KaoQinDataContext db = new KaoQinDataContext();
    var paged = (from x in db.kaoqin_bak select x)
    .Where(where)
    .OrderByDescending(order)
    .Skip((_pageIndex - 1) * _pageSize)
    .Take(_pageSize).AsQueryable();

    _recordCount = (from p in db.kaoqin_bak select p.id).LongCount();
    _pageCount = _recordCount / _pageSize;

    return paged;
}

……
var paged = GetData(30, p, out recordCount, out pageCount);
……
private IQueryable<kaoqin_bak> GetData(
    int _pageSize, int _pageIndex, 
    out long _recordCount, out long _pageCount)
{
    KaoQinDataContext db = new KaoQinDataContext();
    var paged = (from x in db.kaoqin_bak select x)
    .Where(x=>true)
    .OrderByDescending(x=>x.id)
    .Skip((_pageIndex - 1) * _pageSize)
    .Take(_pageSize).AsQueryable();

    _recordCount = (from p in db.kaoqin_bak select p.id).LongCount();
    _pageCount = _recordCount / _pageSize;

    return paged;
}