ASP.NET之AJAX分页步骤

一、在ASPX页面中的代码部分

第一步:在aspx页面中注册组件
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<%@ Register Assembly= "AspNetPager"  Namespace= "Wuqi.Webdiyer"  TagPrefix= "webdiyer"  %>

第二步：在<form id= "form_base"  runat= "server" ></form>中加入ScriptManager
-----------------------------------------

<asp:ScriptManager runat= "server"  ID= "scriptManager" >
</asp:ScriptManager>

第三步：用UpdatePanel和ContentTemplate包起来  UpdatePanel 中的UpdateMode= "Conditional" 很重要

<asp:UpdatePanel ID= "UpdatePanel1"  UpdateMode= "Conditional"  runat= "server" >
<ContentTemplate>

<!--循环数据开始-->
<asp:Repeater ID= "Repeater1"   runat= "server" >
<HeaderTemplate>
<table>
     <tr>
        <th>订单号</th>
        <th>预约商家</th>
        <th>预约时间</th>
     </tr>
</HeaderTemplate>
<ItemTemplate>
     <tr>
         <td><%#Eval( "orderID" )%></td>
         <td><%#Eval( "cname" )%></td>
         <td><%#Eval( "jtime" )%></td>
     </tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<!--循环数据结束-->

<!--分页开始-->
<div id= "page" >
<webdiyer:aspnetpager id= "AspNetPager1"  runat= "server"  onpagechanging= "AspNetPager1_PageChanging"  FirstPageText= "首页"  LastPageText= "尾页"  NextPageText= "下一页"  PageSize= "3"  PrevPageText= "上一页"  AlwaysShow= "True" ></webdiyer:aspnetpager>
<asp:Label ID= "Label1"  runat= "server"  Visible= "False" ></asp:Label>
</div>
<!--分页结束-->
</ContentTemplate>
</asp:UpdatePanel>

二、在ASPX.CS代码中的部分

第一步:在Page_Load()中加入
protected  void  Page_Load( object  sender, EventArgs e)
{
        if  (!IsPostBack)
        {
        //为AspNetPager1控件注册一个异步回发方式
        scriptManager.RegisterAsyncPostBackControl(AspNetPager1);

        string  sqlStr = "select * from jorder where pname='"  + this .jname.Text.ToString() + "' order by pstatus,orderID desc" ;
                Label1.Text = sqlStr.ToString(); //分页，绑定SQL语句
                Pagebangding(Label1.Text); //分页绑定
    }
}

第二步：加入方法两个
/// <summary>
/// 分页绑定数据
/// </summary>
private  void  Pagebangding( string  sql)
{
        this .AspNetPager1.RecordCount = new  DataBaseSql().GetDataTableCount(sql);
        if  ( this .AspNetPager1.RecordCount > 0)
        {
            countStr = this .AspNetPager1.RecordCount.ToString(); //记录数
        }
        else
        {
            countStr = "0" ;
        }
        DataSet ds = new  DataBaseSql().GetPageDataSet( this .AspNetPager1.PageSize, this .AspNetPager1.CurrentPageIndex, sql, "jorder" ); //"jorder"为数据库表名称
        this .Repeater1.DataSource = ds;
        this .Repeater1.DataBind();
}

/// <summary>
/// 分页
/// </summary>
protected  void  AspNetPager1_PageChanging( object  src, Wuqi.Webdiyer.PageChangingEventArgs e)
{
        //调用UpdatePanel的Update()方法更新内容
        UpdatePanel1.Update();
        //设置更新的模式（比较重要,如果为Always就无法实现AJAX分页）
        UpdatePanel1.UpdateMode = UpdatePanelUpdateMode.Conditional;

        this .AspNetPager1.CurrentPageIndex = e.NewPageIndex;
        this .ViewState[ "index" ] = e.NewPageIndex.ToString();
        Pagebangding(Label1.Text); //绑定数据
}