Three-layer + stored procedure paging sample code

Front desk design:

Copy the codeThe code is as follows:

 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="" Inherits="May 21 Exercise.paging" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http:///TR/xhtml1/DTD/"> 
<html xmlns="http:///1999/xhtml"> 
<head runat="server"> 
<title></title> 
<script src="js/Jquery1." type="text/javascript"></script> 
<script type="text/javascript"> 
$(function () { 
$('#txtPagination').focus(function () { 
$(this).val(""); 
}) 
}) 
</script> 
</head> 
<body> 
<form  runat="server"> 
<div> 
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
Height="336px" Width="685px"> 
<Columns> 
<asp:BoundField DataField="Id" HeaderText="No." />
<asp:BoundField DataField="NewsTitle" HeaderText="Title" />
<asp:BoundField DataField="NewsContent" HeaderText="Content" />
<asp:BoundField DataField="CreateTime" 
DataFormatString="{0:yyyy-MM-dd hh:mm:ss}" HeaderText="Published Time" />
</Columns> 
</asp:GridView> 
<asp:LinkButton ID="btnFirst" runat="server" onclick="btnFirst_Click">Page 1</asp:LinkButton>
<asp:LinkButton 
ID="btnPre" runat="server" onclick="btnPre_Click">Previous page</asp:LinkButton>
<asp:LinkButton ID="btnNext" 
runat="server" onclick="btnNext_Click">Next page</asp:LinkButton>
<asp:LinkButton ID="btnLast" runat="server" onclick="btnLast_Click">Last Page</asp:LinkButton><asp:TextBox
ID="txtPagination" runat="server"></asp:TextBox> 
<asp:LinkButton ID="btnSkip" runat="server" onclick="btnSkip_Click">GO</asp:LinkButton> 
</div> 
</form> 
</body> 
</html> 

First create stored procedures in the database

Copy the codeThe code is as follows:

 
create proc usp_role_GetDateByPageIndex 
@pageSize int, 
@pageIndex int 
as 
begin 
select * from 
( 
select *,ROW_NUMBER() over(order by role_id) as rownumber from role) as tbl 
where  between (@pageSize*(@pageIndex-1)+1) and @pageIndex*@pageSize 
end 
exec usp_role_GetDateByPageIndex 5,3 

Add BLL, DAL, DataAccess, MODEL layers to the project
Write a method in DAL:

Copy the codeThe code is as follows:

 
//The method you write by yourself, get the data list by paging
public DataTable GetListDataTable(int PageSize, int PageIndex) 
{ 
SqlParameter[] parameters = { 
new SqlParameter("@PageSize", ), 
new SqlParameter("@PageIndex", ) 
}; 
parameters[0].Value = PageSize; 
parameters[1].Value = PageIndex; 
return ("usp_role_GetDateByPageIndex", parameters); 
} 
Call GetListDataTable in BLL:
public DataTable GetListDataTable(int pagesize, int pageindex) 
{ 
return (pagesize, pageindex); 
} 
Add RunProcedureDataTable method in DbHelper:
public static DataTable RunProcedureDataTable(string stroreProcName, IDataParameter[] parameters) 
{ 
using (SqlConnection connection = new SqlConnection(connectionString)) 
{ 
DataTable dt = new DataTable(); 
(); 
SqlDataAdapter sqlDA = new SqlDataAdapter(); 
 = BuildQueryCommand(connection, stroreProcName, parameters); 
(dt); 
(); 
return dt; 
} 
} 

Then call it in the background:

Copy the codeThe code is as follows:

 
using System; 
using ; 
using ; 
using ; 
using ; 
using ; 
using ; 
namespace practice
{ 
public partial class paging :  
{ 
int pagesize = 10; 
int pageindex = 1; 
protected void Page_Load(object sender, EventArgs e) 
{ 
if (!IsPostBack) 
{ 
ViewState["pageindex"] = 1; 
LadaData(); 
GetListPageindex(); 
} 
} 
private void GetListPageindex() 
{ 
BLL.T_News1 bnews = new BLL.T_News1(); 
int totalcount = (""); 
if (totalcount % pagesize == 0) 
{ 
ViewState["lastpageindex"] = totalcount / pagesize; 
} 
else 
{ 
ViewState["lastpageindex"] = totalcount / pagesize + 1; 
} 
} 
private void LadaData() 
{ 
BLL.T_News1 bnews = new BLL.T_News1(); 
DataTable dt = (pagesize, Convert.ToInt32(ViewState["pageindex"])); 
this. = dt; 
this.(); 
} 
//Page 1
protected void btnFirst_Click(object sender, EventArgs e) 
{ 
ViewState["pageindex"] = 1; 
LadaData(); 
} 
//Previous page
protected void btnPre_Click(object sender, EventArgs e) 
{ 
int pageindex = Convert.ToInt32(ViewState["pageindex"]); 
if (pagesize>1) 
{ 
pageindex--; 
ViewState["pageindex"] = pageindex; 
LadaData(); 
} 
} 
//Next page
protected void btnNext_Click(object sender, EventArgs e) 
{ 
int pageindex = Convert.ToInt32(ViewState["pageindex"]); 
if (pageindex<Convert.ToInt32(ViewState["lastpageindex"])) 
{ 
pageindex++; 
ViewState["pageindex"] = pageindex; 
LadaData(); 
} 
} 
//The last page
protected void btnLast_Click(object sender, EventArgs e) 
{ 
ViewState["pageindex"] = ViewState["lastpageindex"]; 
LadaData(); 
} 
//Jump page
protected void btnSkip_Click(object sender, EventArgs e) 
{ 
int result; 
if ((, out result) == true) 
{ 
ViewState["pageindex"] = (); 
LadaData(); 
} 
else 
{ 
= "Please enter a legal number";
} 
} 
} 
} 