下面就是和大家分享的實現(xiàn)無刷新分頁功能的全部步驟,歡迎學習。
1、新建一個分頁存儲過程:
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
2、設置Ajax控件
想要實現(xiàn)無刷新,肯定會用到Ajax,首先是要放入必不可少的:
asp:ScriptManager ID="ScriptManager1" runat="server">
/asp:ScriptManager>
接著把Repeater控件嵌入到UpdatePanel里面去:
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>發(fā)表時間:
%#Eval("addtime") %>
/em>
/p>
/li>
/ItemTemplate>
/asp:Repeater>
/ul>
p>
總記錄: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>
3、AspNetPager分頁控件
可以看到以上的代碼有個分頁控件,我相信這個分頁控件大家都不陌生了,我就不多介紹。必須有AspNetPager.dll,然后在項目中引用,在頭部引入這一段代碼:
%@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="webdiyer" %>
這時候分頁控件應該就可以使用了。最后在后臺綁定一下數(shù)據(jù),同時也要綁定AspNetPager控件,完整的后臺代碼如下:
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;//當前頁號
int pageSize = 5;//每頁顯示記錄條數(shù)
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
currentPageNumber = 1;
ViewState["currentPageNumber"] = currentPageNumber;
BindData();
}
AspNetPager1.PageChanged += new EventHandler(AspNetPager1_PageChanged); //定義控件分頁事件
}
//獲取記錄總數(shù)
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;
}
}
//綁定數(shù)據(jù)
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); //調用存儲過程
if (dt.Rows.Count > 0)
{
AspNetPager1.PageSize = pageSize;
AspNetPager1.RecordCount = GetCount();
AspNetPager1.CurrentPageIndex = currentPageNumber;
this.Repeater1.DataSource = dt.DefaultView;
this.Repeater1.DataBind();
}
}
//分頁事件
void AspNetPager1_PageChanged(object sender, EventArgs e)
{
currentPageNumber = AspNetPager1.CurrentPageIndex;
ViewState["currentPageNumber"] = currentPageNumber;
BindData();
}
// 讀取存儲過程返回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();
}
}
}
}
至此,基本大功告成,雖然比較簡單,但是涉及到存儲過程,Ajax,分頁控件等知識點,還是蠻值得收藏和學習的,希望我的這篇文章是拋磚引玉,讓大家提供更好的方法,才是我學習的動力。
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