AJAX和三層架構實現分頁功能具體思路及代碼

2024-09-01 08:31:25

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本文涉及到AJAX和三層架構方面的知識，在學習分頁的同時也鞏固了一下它們的相關知識，適合初學者的你

復制代碼代碼如下:

-----------------------------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 += '<tr><td>編號</td><td>標題</td><td>內容</td><td>創建時間</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;
}
})
//第一頁
$('a:first').click(function () {
pageindex = 1;
loaddata();
})
//上一頁
$('#divfenye a:eq(1)').click(function () {
if (pageindex > 1) {
pageindex--;
loaddata();
}
})
//下一頁
$('#divfenye a:eq(2)').click(function () {
if (pageindex < lastpageindex) {
pageindex++;
loaddata();
}
})
//最后一頁
$('#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>
</div>
<div><a href="#">第一頁</a><a href="#">上一頁</a><a href="#">下一頁</a><a href="#">最后一頁</a><input
id="txtPageindex" type="text" /><a href="#">Go</a></div>
</body>
</html>
-------------------------WebService1 --------------------------------
// 若要允許使用 ASP.NET AJAX 從腳本中調用此 Web 服務，請取消對下行的注釋。
[System.Web.Script.Services.ScriptService]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public List<Model.T_News1> GetListAjax(int pagesize, int pageindex)
{
BLL.T_News1 bnews = new BLL.T_News1();
DataTable dt = bnews.GetListDataTable(pagesize, pageindex);
List<Model.T_News1> list = new List<Model.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層：--------------------------
/// <summary>
/// 分頁獲取數據列表
/// </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層：--------------------------
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;
}
}