摘要:
1.第一种方式if(partsSalesOrderTypes.GroupBy(entity => new { entity.Name, entity.Code }).Any(array => array.Count() > 1)) { /*违反多字段唯一时,提示信息处理*/ return;}2.第二 阅读全文
摘要:
1.调用: UserList = UserList.ToList().Intersect(userIDList, new MyUserComparer()).AsQueryable(); 2.需要重写的方法:public class MyUserComparer : IEqualityCompare 阅读全文
摘要:
var beatles = (new[] { new { inst = "张三" , age="50" }, new { inst = "张三" , age="20" }, new { inst = "何英" , age="35" }, new { inst = "张三" , age="60" }, 阅读全文