为datagrid的自带分页添加首页、尾页及状态功能

                   </TR>
              </TABLE>
         </form>
     </body>
</HTML>
后台cs文件代码，DataGridPaging类从System.Web.UI.Page继承，在数据绑定时需要注意没有数据的情况（0页时），以及当页数减少时避免前台正在反页导致缺页。
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Configuration;
 
namespace ZZ.AspnetPaging
{
     public class DataGridPaging : System.Web.UI.Page
     {
         private static string connString = ConfigurationSettings.AppSettings["ConnString"];
         private int recordCount;
         private int pageCount;
 
         protected System.Web.UI.WebControls.LinkButton LBtnFirst;
         protected System.Web.UI.WebControls.LinkButton LBtnPrev;
         protected System.Web.UI.WebControls.LinkButton LBtnNext;
         protected System.Web.UI.WebControls.LinkButton LBtnLast;
          protected System.Web.UI.WebControls.Literal LtlPageIndex;
         protected System.Web.UI.WebControls.Literal LtlPageCount;
         protected System.Web.UI.WebControls.Literal LtlPageSize;
         protected System.Web.UI.WebControls.Literal LtlRecordCount;
         protected System.Web.UI.WebControls.DataGrid DataGrid1;
     
         private void Page_Load(object sender, System.EventArgs e)
         {
              if(!Page.IsPostBack)
              {
                   DataGridDataBind();
              }
         }
 
         //绑定数据
         private void DataGridDataBind()
         {
              DataSet ds = GetCustomersData();
              recordCount = ds.Tables[0].Rows.Count;
              //获取当前的页数
              pageCount = (int)Math.Ceiling( recordCount * 1.0 / PageSize);
              //避免纪录从有到无时，并且已经进行过反页的情况下CurrentPageIndex > PageCount出错
              if(recordCount ==0)
              {
                   this.DataGrid1.CurrentPageIndex = 0;
              }
              else if(this.DataGrid1.CurrentPageIndex >= pageCount)
              {
                   this.DataGrid1.CurrentPageIndex = pageCount - 1;
              }
              this.DataGrid1.DataSource = ds;
              this.DataGrid1.DataBind();
              NavigationStateChange();
         }
 
         #region Web 窗体设计器生成的代码
         override protected void OnInit(EventArgs e)
         {
              //
              // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
              //
              InitializeComponent();
              base.OnInit(e);
         }
         
         ///<summary>
         ///设计器支持所需的方法 - 不要使用代码编辑器修改
         ///此方法的内容。
         ///</summary>
         private void InitializeComponent()
         {    
              this.LBtnFirst.Click += new System.EventHandler(this.LBtnNavigation_Click);
              this.LBtnPrev.Click += new System.EventHandler(this.LBtnNavigation_Click);


              this.LBtnNext.Click += new System.EventHandler(this.LBtnNavigation_Click);
              this.LBtnLast.Click += new System.EventHandler(this.LBtnNavigation_Click);
              this.Load += new System.EventHandler(this.Page_Load);
 
         }
         #endregion
 
         private void LBtnNavigation_Click(object sender, System.EventArgs e)
         {
              LinkButton btn = (LinkButton)sender;
              switch(btn.CommandName)
              {
                   case "First":
                       PageIndex = 0;
                       break;
                   case "Prev"://if( PageIndex > 0 )
                            PageIndex = PageIndex - 1;
                       break;
                   case "Next"://if( PageIndex < PageCount -1)
                            PageIndex = PageIndex + 1;
                       break;
                   case "Last":
                       PageIndex = PageCount - 1;
                       break;
              }
              DataGridDataBind();              
         }
         //数据绑定
         public static DataSet GetCustomersData()
         {
              SqlConnection conn = new SqlConnection(connString);
              string sqlStr = "SELECT CustomerID, CompanyName,Address,Phone FROM Customers";
              SqlCommand comm = new SqlCommand( sqlStr ,conn);
              SqlDataAdapter dataAdapter = new SqlDataAdapter(comm);
              DataSet ds = new DataSet();
              dataAdapter.Fill(ds);
              return ds;
         }
 
         ///<summary>
         ///控制导航按钮或数字的状态
         ///</summary>
         public void NavigationStateChange()
         {
              if( PageCount <= 1 )//( RecordCount <= PageSize )//小于等于一页
              {
                   this.LBtnFirst.Enabled = false;
                   this.LBtnPrev.Enabled = false;
                   this.LBtnNext.Enabled = false;
                   this.LBtnLast.Enabled = false;
              }
              else //有多页
              {
                   if( PageIndex == 0 )//当前为第一页
                   {
                       this.LBtnFirst.Enabled = false;
                       this.LBtnPrev.Enabled = false;
                       this.LBtnNext.Enabled = true;
                       this.LBtnLast.Enabled = true;
                                     
                   }
                   else if( PageIndex == PageCount - 1 )//当前为最后页 
                   {
                       this.LBtnFirst.Enabled = true;
                       this.LBtnPrev.Enabled = true;
                       this.LBtnNext.Enabled = false;
                       this.LBtnLast.Enabled = false;
                                     
                   }
                   else //中间页
                   {
                       this.LBtnFirst.Enabled = true;
                       this.LBtnPrev.Enabled = true;
                       this.LBtnNext.Enabled = true;
                       this.LBtnLast.Enabled = true;
                   }
                   
              }
              if(RecordCount == 0)//当没有纪录时DataGrid.PageCount会显示1页
                   this.LtlPageCount.Text = "0";
              else
                   this.LtlPageCount.Text = PageCount.ToString();
              if(RecordCount == 0)
                   this.LtlPageIndex.Text = "0";
              else
                   this.LtlPageIndex.Text = (PageIndex + 1).ToString();//在有页数的情况下前台显示页数加1
              this.LtlPageSize.Text = PageSize.ToString();
              this.LtlRecordCount.Text = RecordCount.ToString();
         }
 
         
         // 总页数
         public int PageCount
         {
              get{return this.DataGrid1.PageCount;}
         }
         //页大小
         public int PageSize
         {
              get{return this.DataGrid1.PageSize;}
         }
         //页索引，从零开始
         public int PageIndex
         {
              get{return this.DataGrid1.CurrentPageIndex;}
              set{this.DataGrid1.CurrentPageIndex = value;}
         }
         // 纪录总数
         public int RecordCount
         {
              get{return recordCount;}
              set{recordCount = value;}
         }
     }
}


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为什么要这样写分页。。
   应该自己手动分页啊。。 
  这是对新手来的吧  这也加精

原始分页办法。不过以前很流行。小网站也一样