本文内容
- 概述
- 演示 GridPanel 服务器端分页
- 运行结果
- 备注
- 修改记录
概述
分页都有两种，要么在客户端，要么在服务器端。Ext.Net 也不例外。而它的服务器端分页，是 Ext.Net.Store 的代理中，利用处理程序（.ashx）或是 Web Service（.asmx）方式等实现。参考 http://examples.ext.net/，并检索 "Paging and Sorting"。
演示 GridPanel 服务器端分页
本例演示，接近早先 ASP.NET 的分页实现。从服务器端获得下一页数据，绑定到 GridPanel 显示。方便起见，用 Linq 获取分页的数据。
自定义 MyCompany.cs 类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace ExtNetGridPanelServerPaging
{
public class MyCompany
{
public MyCompany(string name, double price, double change, double pctChange)
{
this.Name = name;
this.Price = price;
this.Change = change;
this.PctChange = pctChange;
}
public MyCompany()
{
}
public string Name { get; set; }
public double Price { get; set; }
public double Change { get; set; }
public double PctChange { get; set; }
public static List<MyCompany> GetDataSource()
{
List<MyCompany> data = new List<MyCompany>
{
new MyCompany("3m Co", 71.72, 0.02, 0.03),
new MyCompany("Alcoa Inc", 29.01, 0.42, 1.47),
new MyCompany("Altria Group Inc", 83.81, 0.28, 0.34),
new MyCompany("American Express Company", 52.55, 0.01, 0.02),
new MyCompany("American International Group, Inc.", 64.13, 0.31, 0.49),
new MyCompany("AT&T Inc.", 31.61, -0.48, -1.54),
new MyCompany("Boeing Co.", 75.43, 0.53, 0.71),
new MyCompany("Caterpillar Inc.", 67.27, 0.92, 1.39),
new MyCompany("Citigroup, Inc.", 49.37, 0.02, 0.04),
new MyCompany("E.I. du Pont de Nemours and Company", 40.48, 0.51, 1.28),
new MyCompany("Exxon Mobil Corp", 68.1, -0.43, -0.64),
new MyCompany("General Electric Company", 34.14, -0.08, -0.23),
new MyCompany("General Motors Corporation", 30.27, 1.09, 3.74),
new MyCompany("Hewlett-Packard Co.", 36.53, -0.03, -0.08),
new MyCompany("Honeywell Intl Inc", 38.77, 0.05, 0.13),
new MyCompany("Intel Corporation", 19.88, 0.31, 1.58),
new MyCompany("International Business Machines", 81.41, 0.44, 0.54),
new MyCompany("Johnson & Johnson", 64.72, 0.06, 0.09),
new MyCompany("JP Morgan & Chase & Co", 45.73, 0.07, 0.15),
new MyCompany("McDonald\"s Corporation", 36.76, 0.86, 2.40),
new MyCompany("Merck & Co., Inc.", 40.96, 0.41, 1.01),
new MyCompany("Microsoft Corporation", 25.84, 0.14, 0.54),
new MyCompany("Pfizer Inc", 27.96, 0.4, 1.45),
new MyCompany("The Coca-Cola Company", 45.07, 0.26, 0.58),
new MyCompany("The Home Depot, Inc.", 34.64, 0.35, 1.02),
new MyCompany("The Procter & Gamble Company", 61.91, 0.01, 0.02),
new MyCompany("United Technologies Corporation", 63.26, 0.55, 0.88),
new MyCompany("Verizon Communications", 35.57, 0.39, 1.11),
new MyCompany("Honeywell Intl Inc", 38.77, 0.05, 0.13),
new MyCompany("Intel Corporation", 19.88, 0.31, 1.58),
new MyCompany("International Business Machines", 81.41, 0.44, 0.54),
new MyCompany("Johnson & Johnson", 64.72, 0.06, 0.09),
new MyCompany("JP Morgan & Chase & Co", 45.73, 0.07, 0.15),
new MyCompany("McDonald\"s Corporation", 36.76, 0.86, 2.40),
new MyCompany("Merck & Co., Inc.", 40.96, 0.41, 1.01),
new MyCompany("Microsoft Corporation", 25.84, 0.14, 0.54),
new MyCompany("Pfizer Inc", 27.96, 0.4, 1.45),
new MyCompany("The Coca-Cola Company", 45.07, 0.26, 0.58),
new MyCompany("The Home Depot, Inc.", 34.64, 0.35, 1.02),
new MyCompany("The Procter & Gamble Company", 61.91, 0.01, 0.02),
new MyCompany("United Technologies Corporation", 63.26, 0.55, 0.88),
new MyCompany("Verizon Communications", 35.57, 0.39, 1.11),
new MyCompany("Honeywell Intl Inc", 38.77, 0.05, 0.13),
new MyCompany("Intel Corporation", 19.88, 0.31, 1.58),
new MyCompany("International Business Machines", 81.41, 0.44, 0.54),
new MyCompany("Johnson & Johnson", 64.72, 0.06, 0.09),
new MyCompany("JP Morgan & Chase & Co", 45.73, 0.07, 0.15),
new MyCompany("McDonald\"s Corporation", 36.76, 0.86, 2.40),
new MyCompany("Merck & Co., Inc.", 40.96, 0.41, 1.01),
new MyCompany("Microsoft Corporation", 25.84, 0.14, 0.54),
new MyCompany("Pfizer Inc", 27.96, 0.4, 1.45),
new MyCompany("The Coca-Cola Company", 45.07, 0.26, 0.58),
new MyCompany("The Home Depot, Inc.", 34.64, 0.35, 1.02),
new MyCompany("The Procter & Gamble Company", 61.91, 0.01, 0.02),
new MyCompany("United Technologies Corporation", 63.26, 0.55, 0.88),
new MyCompany("Verizon Communications", 35.57, 0.39, 1.11),
new MyCompany("Honeywell Intl Inc", 38.77, 0.05, 0.13),
new MyCompany("Intel Corporation", 19.88, 0.31, 1.58),
new MyCompany("International Business Machines", 81.41, 0.44, 0.54),
new MyCompany("Johnson & Johnson", 64.72, 0.06, 0.09),
new MyCompany("JP Morgan & Chase & Co", 45.73, 0.07, 0.15),
new MyCompany("McDonald\"s Corporation", 36.76, 0.86, 2.40),
new MyCompany("Merck & Co., Inc.", 40.96, 0.41, 1.01),
new MyCompany("Microsoft Corporation", 25.84, 0.14, 0.54),
new MyCompany("Pfizer Inc", 27.96, 0.4, 1.45),
new MyCompany("The Coca-Cola Company", 45.07, 0.26, 0.58),
new MyCompany("The Home Depot, Inc.", 34.64, 0.35, 1.02),
new MyCompany("The Procter & Gamble Company", 61.91, 0.01, 0.02),
new MyCompany("United Technologies Corporation", 63.26, 0.55, 0.88),
new MyCompany("Verizon Communications", 35.57, 0.39, 1.11),
new MyCompany("Wal-Mart Stores, Inc.", 45.45, 0.73, 1.63)
};
return data;
}
public static IEnumerable<MyCompany> GetPaging(int startRec, int MaxRec, ref int total)
{
List<MyCompany> data = GetDataSource();
IEnumerable<MyCompany> query = data.Skip(startRec).Take(MaxRec);
total = data.Count();
return query;
}
}
}