class Data { public int A { get; set; } public string Name { get; set; } public override string ToString() { return "A:"+A+",Name:"+Name; } } List<Data> datas = new List<Data>() { new Data() { A = 1,Name = "me"}, new Data(){ A = 10,Name = "hello"}, new Data(){ A = 5,Name = "world"} }; var newData = datas.Where(m => m.A >= 5 && m.Name =="hello"); foreach (var data in newData) { Console.WriteLine(data); }
使用集合的Where方法传递一个Lambda表达式,过滤元素,m参数为每个元素代表,内容条件为true表示获取,false表示舍弃