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JQuery與JSon實(shí)現(xiàn)的無(wú)刷新分頁(yè)代碼

更新時(shí)間：2011年09月13日 20:25:42 作者：

相信大家都上過(guò)優(yōu)酷吧，當(dāng)你在看一個(gè)視頻的時(shí)候，你想看看視頻下面的評(píng)論，點(diǎn)擊了第2頁(yè)的評(píng)論，整個(gè)頁(yè)面刷新，那么視頻從頭開(kāi)始播放，相信這會(huì)被用戶罵死的。

如圖
而無(wú)刷新分頁(yè)可以解決這個(gè)問(wèn)題，上面播放著視頻，下面我點(diǎn)下一頁(yè)看著評(píng)論，現(xiàn)在大部分的網(wǎng)站都是無(wú)刷新分頁(yè)。
源碼如下（我是采用一頁(yè)顯示10條記錄）：
需要四個(gè)文件
一個(gè)實(shí)體類文件 CategoryInfoModel.cs
一個(gè)SqlHelper SQLHelper.cs
一個(gè)AJAX服務(wù)端處理程序 PagedService.ashx
一個(gè)客戶端調(diào)用頁(yè)面 WSXFY.htm
CategoryInfoModel.cs和SQLHelper.cs我就不寫了，都知道是什么文件
PagedService.ashx 代碼如下

復(fù)制代碼代碼如下:

 
using System.Web.Script.Serialization; 
public void ProcessRequest(HttpContext context) 
{ 
context.Response.ContentType = "text/plain"; 
string strAction = context.Request["Action"]; 
//取頁(yè)數(shù) 
if (strAction == "GetPageCount") 
{ 
string strSQL = "SELECT COUNT(*) FROM CategoryInfo"; 
int intRecordCount = SqlHelper.ExecuteScalar(strSQL); 
int intPageCount = intRecordCount / 10; 
if (intRecordCount % 10 != 0) 
{ 
intPageCount++; 
} 
context.Response.Write(intPageCount); 
}//取每頁(yè)數(shù)據(jù) 
else if (strAction == "GetPageData") 
{ 
string strPageNum = context.Request["PageNum"]; 
int intPageNum = Convert.ToInt32(strPageNum); 
int intStartRowIndex = (intPageNum - 1) * 10 + 1; 
int intEndRowIndex = (intPageNum) * 10 + 1; 
string strSQL = "SELECT * FROM ( SELECT ID,CategoryName,Row_Number() OVER(ORDER BY ID ASC) AS rownum FROM CategoryInfo) AS t"; 
strSQL += " WHERE t.rownum >= " + intStartRowIndex + " AND t.rownum <= " + intEndRowIndex; 
DataSet ds = new DataSet(); 
SqlConnection conn = SqlHelper.GetConnection(); 
ds = SqlHelper.ExecuteDataset(conn, CommandType.Text, strSQL); 
List<CategoryInfoModel> categoryinfo_list = new List<CategoryInfoModel>();//定義實(shí)體集合 
for (int i = 0; i < ds.Tables[0].Rows.Count; i++) 
{ 
CategoryInfoModel categoryinfo = new CategoryInfoModel(); 
categoryinfo.CategoryInfoID = Convert.ToInt32(ds.Tables[0].Rows[i]["ID"]); 
categoryinfo.CategoryName = ds.Tables[0].Rows[i]["CategoryName"].ToString(); 
categoryinfo_list.Add(categoryinfo); 
} 
JavaScriptSerializer jss = new JavaScriptSerializer(); 
context.Response.Write(jss.Serialize(categoryinfo_list));//序列化實(shí)體集合為javascript對(duì)象 
} 
} 

WSXFY.htm 代碼如下

復(fù)制代碼代碼如下:

 
<head> 
<title>無(wú)刷新分頁(yè)</title> 
<script type="text/javascript" src="../Scripts/jquery-1.5.1.min.js"></script> 
<script type="text/javascript"> 
$(function () { 
$.post("PagedService.ashx", { "Action": "GetPageCount" }, function (response, status) { 
for (var i = 1; i <= response; i++) { 
var td = $("<td><a href=''>" + i + "</a></td>"); 
$("#trPage").append(td); 
td.click(function (e) { 
e.preventDefault(); //不要導(dǎo)向鏈接 
$.post("PagedService.ashx", { "Action": "GetPageData", "PageNum":$(this).text() }, function (response, status) { 
var categorys = $.parseJSON(response); 
$("#ulCategory").empty(); 
for (var i = 0; i < categorys.length; i++) { 
var category = categorys[i]; 
var li = $("<li>" + category.CategoryInfoID + "-" + category.CategoryName + "</li>"); 
$("#ulCategory").append(li); 
} 
}); 
}); 
} 
}); 
}); 
</script> 
</head> 
<body> 
<ul id="ulCategory"></ul> 
<table> 
<tr id="trPage"> 
</tr> 
</table> 
</body> 
</html> 