AJAX和三层架构实现分页功能具体思路及代码

【 tulaoshi.com - Web开发 】

代码如下：

-----------------------------HTMLPage1.htm---------------------------------
html xmlns="http://www.w3.org/1999/xhtml"
head
title/title
style type="text/css"
table{ border:solid 1px #444; background-color:Aqua;}
table td{border:solid 1px #444;}
/style
script src="js/Jquery1.7.js" type="text/javascript"/script
script type="text/javascript"
$(function () {
var pageindex = 1;
var pagesize = 10;
var lastpageindex = 1;
loaddata();
function loaddata() {
$.ajax({
type: "post",
contentType: "application/json",
url: "WebService1.asmx/GetListAjax",
data: "{pagesize:" + pagesize + ",pageindex:" + pageindex + "}",
success: function (result) {
var strtable = 'table';
strtable += 'trtd编号/tdtd标题/tdtd内容/tdtd创建时间/td/tr';
for (var i = 0; i result.d.length; i++) {
strtable += 'tr';
strtable += 'td' + result.d[i].Id + '/td';
strtable += 'td' + result.d[i].NewsTitle + '/td';
strtable += 'td' + result.d[i].NewsContent + '/td';
strtable += 'td' + result.d[i].CreateTime + '/td';
strtable += '/tr';
}
strtable += '/table';
$('#mydiv').html(strtable);
}
})
}
$.ajax({
type: "post",
contentType: "application/json",
url: "WebService1.asmx/GetLastPageindex",
data: "{pagesize:" + pagesize + "}",
success: function (result) {
lastpageindex = result.d;
}
})
//第一页
$('a:first').click(function () {
pageindex = 1;
loaddata();
})
//上一页
$('#divfenye a:eq(1)').click(function () {
if (pageindex 1) {
pageindex--;
loaddata();
}
})
//下一页
$('#divfenye a:eq(2)').click(function () {
if (pageindex lastpageindex) {
pageindex++;
loaddata();
}
})
//最后一页
$('#divfenye a:eq(3)').click(function () {
pageindex = lastpageindex;
loaddata();
})
$('#divfenye a:last').click(function () {
pageindex = $('#txtPageindex').val();
loaddata();
})
$('#txtPageindex').focus(function () {
$(this).val('');
})
})
/script
/head
body
div id="mydiv"
/div
div id="divfenye"a href="#"第一页/aa href="#"上一页/aa href="#"下一页/aa href="#"最后一页/ainput
id="txtPageindex" type="text" /a href="#"Go/a/div
/body
/html
-------------------------WebService1 --------------------------------
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
[System.Web.Script.Services.ScriptService]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public ListModel.T_News1 GetListAjax(int pagesize, int pageindex)
{
BLL.T_News1 bnews = new BLL.T_News1();
DataTable dt = bnews.GetListDataTable(pagesize, pageindex);
ListModel.T_News1 list = new ListModel.T_News1();
int Id;
string newstitle = "";
string newscontent = "";
DateTime createtime;
for (int i = 0; i dt.Rows.Count; i++)
{
Id = Convert.ToInt32(dt.Rows[i]["Id"]);
newstitle = dt.Rows[i]["NewsTitle"].ToString();
newscontent = dt.Rows[i]["NewsContent"].ToString();
createtime = Convert.ToDateTime(dt.Rows[i]["CreateTime"]);
Model.T_News1 news = new Model.T_News1()
{
Id = Id,
NewsTitle = newstitle,
NewsContent = newscontent,
CreateTime = createtime
};
list.Add(news);
}
return list;
}
[WebMethod]
public int GetLastPageindex(int pagesize)
{
BLL.T_News1 bnews = new BLL.T_News1();
int totalcount = bnews.GetRecordCount("");
if (totalcount % pagesize == 0)
{
return totalcount / pagesize;
}
else
{
return totalcount / pagesize + 1;
}
}
------------------------------DAL层：--------------------------
/// summary
/// 分页获取数据列表
/// /summary
public DataTable GetListDataTable(int PageSize, int PageIndex)
{
SqlParameter[] parameters = {
new SqlParameter("@PageSize", SqlDbType.Int),
new SqlParameter("@PageIndex", SqlDbType.Int)
};
parameters[0].Value = PageSize;
parameters[1].Value = PageIndex;
return DbHelperSQL.RunProcedureDataTable("pro_fenye", parameters);
}
--------------------BLL层：--------------------------
public DataTable GetListDataTable(int pagesize, int pageindex)
{
return dal.GetListDataTable(pagesize, pageindex);
}
------------------DbHelperSQL:-----------------------
public static DataTable RunProcedureDataTable(string storedProcName, IDataParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataTable dt = new DataTable();
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dt);
connection.Close();
return dt;
}
}