asp.net GridView Learning II Custom Paging functionality

1 on some core code

2ClientInfo.cs and ClientinfoAccessObj.cs in the study one.

　3 4using System;
　5using System.Data;
　6using System.Configuration;
　7using System.Collections;
　8using system.web;
9using System.Web.Security;
10using System.Web.UI;
11using System.Web.UI.WebControls;
12using System.Web.UI.WebControls.WebParts;
13using System.Web.UI.HtmlControls;
14using System.Collections.Generic; 16public partial class GridViewPagingTest:System.Web.UI.Page 17{int PageSize = 10;//per page display record number 19 20//Current  Page number, starting from 1, using ViewState to save data between postbacks private int Curpage {returns viewstate["curpage"] = = null?
0:convert.toint32 (viewstate["Curpage"]); {viewstate["curpage"] = value 30} 31} 32 33//Total number of pages, using ViewState to save data between postbacks privat e int PageCount {viewstate["pagecount"] = = null? 0:convert.toint32 (viewstate["Pag
Ecount "]); The set of the viewstate["pagecount"] = value, {} protected void Page_Load (object sender, EventArgs e) (! IsPostBack) 50 {51//First request Curpage = 1; gridview1.datasource = Getclientsforpage (curpage);//According to the current page Get customer Information Lblinfo.text = string.
Format ("{0} page/total {1} page", 1, PageCount); Gridview1.databind ()//Binding Data 56} 57} 58//According to the page subscript get the customer information of the page private list<clientinfo> Getclientsforpag E (int pageIndex) {clientinfoaccessobj accessor = new Clientinfoaccessobj (); List<clientinfo> Client s = accessor. Getallclients ()//Get all customer information PageCount = clients.
Count/pagesize + 1;//The total number of customer information divided by the number of records displayed per page to obtain totals if (PageIndex > PageCount) return null; int StartIndex = (pageIndex-1) * pagesize;//get data subscript list<clientinfo> ret = new list<clientinfo> ()
; for (int i = StartIndex i < StartIndex + PageSize && i < clients. Count; i++) to Ret.
ADD (Clients[i]);
return ret; protected void Btnnext_click (object sender, EventArgs e) () (curpage+1>PageCount)//judge whether the current is greater than the total number of pages curpage = PageCount;
Ridview1.datasource = Getclientsforpage (curpage); Lblinfo.text = string.
Format ("{0} page/total {1} page", Curpage, PageCount);
Gridview1.databind ();
protected void Btnprew_click (object sender, EventArgs e) (= if (curPage-1 ==0)//Determine whether the current is greater than the total number of pages 89 {
Curpage = 1;
The curpage--} is the Gridview1.datasource = Getclientsforpage (curpage); Lblinfo.text = string.
Format ("{0} page/total {1} page", Curpage, PageCount);
Gridview1.databind (); protected void Btngo_click (object sender, EventArgs e)-{102 try-D-int pageIndex = Conv Ert.
ToInt32 (Txtpageindex.text);  Rule if (PageIndex > PageCount) pageIndex = PageCount 108} 109 if (PageIndex <
1) PageIndex = 1 112} 113 curpage = PageIndex; 114 GridView1.
DataSource = Getclientsforpage (curpage); Lblinfo.text = string.
Format ("{0} page/total {1} page", Curpage, PageCount);
116 Gridview1.databind (); 117} 118 catch (Exception ex) 119 {Clientscript.registerclientscriptblock (this. GetType (), "info", "alert (' illegal character ');", true);//inject JavaScript script to page 121} 122} 123} 124