Linq学习笔记(1.3)——Take、Skip

using System; using System.Data; using System.Configuration; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Text; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Collections.Generic; using System.Collections; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //从集合中取固定数量的元素 Response.Write("<hr>从集合中取固定数量的元素：<br>"); string[] stringArray = { "Ajax", "Csharp", "Javascript", "Css Desige", "Asp.net", "Gis" }; var books = stringArray.Take(3); foreach (var book in books){ Response.Write(string.Format("<div class='result'>{0}</div>", book)); } //从select结果中取固定数量的元素 Response.Write("<hr>从select结果中取固定数量的元素：<br>"); List<Student> StudentList = GetStudents(); var students1 = (from n in StudentList where n.Language == "Chinese" select new {n.Name,n.Age }).Take(2); foreach (var student in students1) { Response.Write(string.Format("<div class='result'>name:{0}; age:{1}</div>", student.Name, student.Age)); } //只查询合适对象集合的某个属性 Response.Write("<hr>跳过集合的几个元素后取剩余所有元素：<br>"); var books1 = stringArray.Skip(3); foreach (var book in books1) { Response.Write(string.Format("<div class='result'>{0}</div>", book)); } //取满足指定条件元素 Response.Write("<hr>取满足指定条件元素：<br>"); var students2 = StudentList.TakeWhile(student => student.Age > 20); //相当与where和select的结合 foreach (var student in students2) { Response.Write(string.Format("<div class='result'>{0}</div>", student.Name)); } //将满足指定条件元素过滤后选择剩余的所有元素 Response.Write("<hr>将满足指定条件元素过滤后选择剩余的所有元素：<br>"); var students3 = StudentList.SkipWhile(student => student.Age > 20); //相当与where和select的结合后反选 foreach (var student in students3) { Response.Write(string.Format("<div class='result'>{0}</div>", student.Name)); } } //构造一个学生集合体 private List<Student> GetStudents() { List<Student> students = new List<Student> { new Student{ Name="YOUNG", Age=25, Language="Chinese"}, new Student{ Name="JESSIE", Age=21, Language="Scotland"}, new Student{ Name="KELLY", Age=18, Language="English"}, new Student{ Name="JUNE", Age=20, Language="English"}, new Student{ Name="ADRIAN", Age=22, Language="Italy"}, new Student{ Name="BRUCE", Age=17, Language="Scotland"}, new Student{ Name="BRANT", Age=30, Language="Germany"}, new Student{ Name="BEN", Age=25, Language="Chinese"} }; return students; } } //学生类 class Student { public int Age { get; set; } public string Name { get; set; } public string Language { get; set; } }

 

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转自：　http://www.cnblogs.com/young18/archive/2007/06/05/772499.html