下面就是和大家分享的实现无刷新分页功能的全部步骤,欢迎学习。
1、新建一个分页存储过程:
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CREATE procedure [dbo].[P_Pager]
(@PageNumber int ,
@PageSize int )
as
declare @sql nvarchar(4000)
set @sql = 'select top ' + Convert ( varchar , @PageSize) + ' * from T_Test where [type]=1 and id not in (select top ' + Convert ( varchar , (@PageNumber - 1) * @PageSize) + ' id from T_Test order by id desc) order by id desc'
exec sp_executesql @sql
GO
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2、设置Ajax控件
想要实现无刷新,肯定会用到Ajax,首先是要放入必不可少的:
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
接着把Repeater控件嵌入到UpdatePanel里面去:
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<asp:UpdatePanel ID= "UpdatePanel1" runat= "server" >
<ContentTemplate>
<ul>
<asp:Repeater ID= "Repeater1" runat= "server" >
<ItemTemplate>
<li>
<p>
<span><%#Eval( "username" ) %>:</span><%#Eval( "content" ).ToString())) %></p>
<p>
<em>发表时间:
<%#Eval( "addtime" ) %>
</em>
</p>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>
<p>
总记录:<asp:Literal ID= "ltlCount" runat= "server" ></asp:Literal></p>
<p>
<webdiyer:AspNetPager ID= "AspNetPager1" runat= "server" AlwaysShow= "true" PageIndexBoxType= "DropDownList" >
</webdiyer:AspNetPager>
</p>
</div>
</ContentTemplate>
</asp:UpdatePanel>
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3、AspNetPager分页控件
可以看到以上的代码有个分页控件,我相信这个分页控件大家都不陌生了,我就不多介绍。必须有AspNetPager.dll,然后在项目中引用,在头部引入这一段代码:
<%@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="webdiyer" %>
这时候分页控件应该就可以使用了。最后在后台绑定一下数据,同时也要绑定AspNetPager控件,完整的后台代码如下:
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using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using Wuqi.Webdiyer;
using System.Data.SqlClient;
public partial class AjaxPager : System.Web.UI.Page
{
int currentPageNumber; //当前页号
int pageSize = 5; //每页显示记录条数
protected void Page_Load( object sender, EventArgs e)
{
if (!IsPostBack)
{
currentPageNumber = 1;
ViewState[ "currentPageNumber" ] = currentPageNumber;
BindData();
}
AspNetPager1.PageChanged += new EventHandler(AspNetPager1_PageChanged); //定义控件分页事件
}
//获取记录总数
private int GetCount()
{
string sql = "select COUNT(*) from T_Test" ;
DataTable dt = GetTable(sql, CommandType.Text, values);
if (dt.Rows.Count > 0)
{
return Convert.ToInt32(dt.Rows[0][0]);
}
else
{
return 0;
}
}
//绑定数据
private void BindData()
{
ltlCount.Text = GetCount().ToString();
currentPageNumber = Convert.ToInt32(ViewState[ "currentPageNumber" ]);
SqlParameter[] values = { new SqlParameter( "@PageNumber" , currentPageNumber), new SqlParameter( "@PageSize" , pageSize) };
DataTable dt = GetTable( "P_Pager" , CommandType.StoredProcedure, values); //调用存储过程
if (dt.Rows.Count > 0)
{
AspNetPager1.PageSize = pageSize;
AspNetPager1.RecordCount = GetCount();
AspNetPager1.CurrentPageIndex = currentPageNumber;
this .Repeater1.DataSource = dt.DefaultView;
this .Repeater1.DataBind();
}
}
//分页事件
void AspNetPager1_PageChanged( object sender, EventArgs e)
{
currentPageNumber = AspNetPager1.CurrentPageIndex;
ViewState[ "currentPageNumber" ] = currentPageNumber;
BindData();
}
// 读取存储过程返回table
private DataTable GetTable( string sql, CommandType t, params SqlParameter[] values)
{
using (SqlConnection conn = new SqlConnection( "Data Source=127.0.0.1;Initial Catalog=testDB;Persist Security Info=True;User ID=sa;Password=123456" ))
{
SqlCommand comm = new SqlCommand(sql, conn);
comm.CommandType = t;
if (values != null && values.Length > 0)
comm.Parameters.AddRange(values);
SqlDataAdapter da = new SqlDataAdapter(comm);
DataSet ds = new DataSet();
try
{
conn.Open();
da.Fill(ds);
return ds.Tables[0];
}
catch (Exception)
{
return null ;
}
finally
{
conn.Close();
conn.Dispose();
}
}
}
}
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至此,基本大功告成,虽然比较简单,但是涉及到存储过程,Ajax,分页控件等知识点,还是蛮值得收藏和学习的,希望我的这篇文章是抛砖引玉,让大家提供更好的方法,才是我学习的动力。