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linq高级查询

Linq高级查

开头: Repeater1.DataSource = con.Users.Where(r => r.NickName.StartsWith("值"));

结尾: Repeater1.DataSource = con.Users. Where( r => r.NickName.EndsWith("值"));

模糊查(包含):Repeater1.DataSource = con.Users.Where(r => r.NickName.Contains("值"));

个数: ulist.Count + "</br>");

最大值: ulist.Max(r => Convert.ToDecimal(r.PassWord)) + "</br>");

最小值:  ulist.Min(r => Convert.ToDecimal(r.PassWord)) + "</br>");

平均值:  ulist.Average(r => Convert.ToDecimal(r.PassWord)) + "</br>");

求和: ulist.Sum(r => Convert.ToDecimal(r.PassWord)) + "</br>");

排序

升序:   ulist.OrderBy ( r =>r.Ids )   

降序:ulist.OrderByDescending( r =>r.Ids )

分页:ulist . Skip( 3 )//跳过几条 . Take(  3 ) //取几条

 

集合的交集;list <users>  ulist  =   list1.Intersect( list2).Intersect( list3);//取多个集合交集  有多少个集合 写多少个Intersect

linq高级查询