ASP.NET无刷新分页简单实现

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 

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> 

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(); 
      } 
    } 
  } 
}