LinQ各种方式查询、组合查询、IQueryable集合类型

1、模糊查询（包含）

Repeater1.DataSource = con.car.Where(r =>r.name.Contains(s)).ToList();

2、开头查询

Repeater1.DataSource = con.car.Where(r =>r.name.StartsWith(s)).ToList();

3、结尾查询

Repeater1.DataSource = con.car.Where(r =>r.name.EndsWith(s)).ToList();

4、个数显示

IEnumerable<car> clist = con.car;
int count =clist.Count;

5、最大最小值平均值

con.car.Max(r => r.price);
con.car.Min(r => r.price);
con.car.Average(r => r.price);

6、求和、升序、降序

con.car.Sum(r => r.price);
Repeater1.DataSource = con.car.OrderBy(r => r.price);
Repeater1.DataSource = con.car.OrderByDescending(r => r.price);

7、分页

　　集合的Skip方法：跳过多少条数据

　　Take方法：取前多少条数据　　

int count = 4;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            using (Data0928DataContext con = new Data0928DataContext())
            {
                Repeater1.DataSource = con.Users.Take(count).ToList();
                Repeater1.DataBind();
            }
        }
    }

分页查询