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Entity Framework学习三:查询、插入、更新和删除操作

时间:2015-09-20 19:00:00      阅读:113      评论:0      收藏:0      [点我收藏+]

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1.LINQ过滤数据 

var query = from person in context.People
                        where person.FirstName.StartsWith("a")
                        select person;
var methodQuery = context.People.Where(p => p.FirstName.StartsWith("a"));

两种不同的写法,效果一样。

  • 多条件组合查找
var query = from person in context.People
                        where person.FirstName.StartsWith("a") &&
                        person.LastName.EndsWith("b")
                        select person;
var methodQuery = context.People.Where(p => p.FirstName.StartsWith("a") && p.LastName.EndsWith("b"));
  • 对查找结果排序
            var query = from person in context.People
                        where person.FirstName.StartsWith("a") &&
                        person.LastName.EndsWith("b")
                        orderby person.FirstName,person.LastName
                        select person;
            var methodQuery = context.People
                .Where(p => p.FirstName.StartsWith("a") && p.LastName.EndsWith("b"))
                .OrderBy(p => p.FirstName)
                .ThenBy(p => p.LastName);

Entity Framework学习三:查询、插入、更新和删除操作

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原文地址:http://www.cnblogs.com/zjmsky/p/4823847.html

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