先在数据库中定义存储过程，轻易实现百万级数据分页：

//@PageSize：分页大小，PageIndex：页号，@PageCount：总页数，@recordCount：记录数

CREATE PROCEDURE GetCustomDataPage @pageSize int, @pageIndex int, @pageCount int output, @recordCount int output AS

declare @SQL varchar(1000)

select @recordCount=count(*) from products

set @pageCount=ceiling(@recordCount*1.0/@pageSize)

if @pageIndex = 0 or @pageCount<=1

set @SQL=′select top ′+str(@pageSize)+′ productID,productName, unitPrice from products order by productID asc′

else if @pageIndex = @pageCount -1

set @SQL=′select * from ( select top ′+str(@recordCount - @pageSize * @pageIndex)+′ productID,productName, unitPrice from products order by productID desc) TempTable order by productID asc′

exec(@SQL)

GO

好了，存储过程建好了，那么如何在.Net中使用呢？请看以下代码：

private uint pageCount;  //总页数 
        private uint recordCount;  //总记录数
        private DataSet GetPageData(uint pageSize, uint pageIndex) 
        { 
            string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];            
            SqlConnection conn = new SqlConnection(strConn); 
            conn.Open(); 
            SqlCommand command = new SqlCommand("GetCustomDataPage",conn);  //第一个参数为存储过程名 
            command.CommandType = CommandType.StoredProcedure;   //声明命令类型为存储过程 
            command.Parameters.Add("@pageSize",SqlDbType.Int); 
            command.Parameters["@pageSize"].Value = pageSize; 
            command.Parameters.Add("@pageIndex",SqlDbType.Int); 
            command.Parameters["@pageIndex"].Value = pageIndex; 
            command.Parameters.Add("@pageCount",SqlDbType.Int); 
            command.Parameters["@pageCount"].Value = pageCount; 
            command.Parameters["@pageCount"].Direction = ParameterDirection.Output;  //存储过程中的输出参数 
            command.Parameters.Add("@recordCount",SqlDbType.Int); 
            command.Parameters["@recordCount"].Value = recordCount; 
            command.Parameters["@recordCount"].Direction = ParameterDirection.Output; //存储过程中的输出参数 
            SqlDataAdapter adapter = new SqlDataAdapter(command); 
            DataSet ds = new DataSet(); 
            adapter.Fill(ds);            
            //获得输出参数值 
            pageCount = Convert.ToUInt32(command.Parameters["@pageCount"].Value); 
            recordCount = Convert.ToUInt32(command.Parameters["@recordCount"].Value); 
            
            conn.Close(); 
            return ds; 
        } 
        //绑定数据到DataGrid中 
        private void BindDataGrid() 
        { 
            DataSet ds = GetPageData((uint)dgProduct.PageSize,(uint)dgProduct.CurrentPageIndex); 
            dgProduct.VirtualItemCount = (int)recordCount; 
            dgProduct.DataSource = ds; 
            dgProduct.DataBind(); 
        } 
        //页面加载时就绑定DataGrid 
        private void Page_Load(object sender, System.EventArgs e) 
        { 
            if(!Page.IsPostBack) 
            { 
               BindDataGrid(); 
            } 
        } 
        //用户翻页时事件处理 
        private void dgProduct_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e) 
        { 
            dgProduct.CurrentPageIndex = e.NewPageIndex; 
            BindDataGrid(); 
        } 
        //用户单击编辑按纽时事件处理 
        private void dgProduct_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) 
        { 
            dgProduct.EditItemIndex = e.Item.ItemIndex; 
            BindDataGrid(); 
        } 
        //用户单击取消按纽时事件处理 
        private void dgProduct_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) 
        { 
            dgProduct.EditItemIndex = -1; 
            BindDataGrid(); 
        } 
        //用户单击更新按纽时事件处理 
        private void dgProduct_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) 
        { 
            string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];            
            SqlConnection conn = new SqlConnection(strConn); 
            conn.Open(); 
            //string strSQL = "update from products set productName=@productName, set unitPrice=@unitPrice where productID=@productID"; 
            string strSQL = "update products set productName=@productName where productID=@productID"; 
            SqlCommand command = new SqlCommand(strSQL,conn); 
            command.Parameters.Add("@productName",SqlDbType.NVarChar,40); 
            command.Parameters["@productName"].Value = ((TextBox)(e.Item.Cells[1].Controls[0])).Text.Trim(); 
            //command.Parameters.Add("@unitPrice",SqlDbType.Int); 
            //command.Parameters["@unitPrice"].Value = Convert.ToInt32(((TextBox)(e.Item.Cells[2].Controls[0])).Text.Trim()); 
            command.Parameters.Add("@productID",SqlDbType.Int); 
            command.Parameters["@productID"].Value = dgProduct.DataKeys[e.Item.ItemIndex]; 
            command.ExecuteNonQuery(); 
            conn.Close(); 
            dgProduct.EditItemIndex = -1; 
            BindDataGrid(); 
        } 
       //用户单击删除按纽时事件处理 
        private void dgProduct_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) 
        { 
            string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]; 
            SqlConnection conn = new SqlConnection(strConn); 
            conn.Open(); 
            SqlCommand command = new SqlCommand("DeleteProduct",conn); 
            command.CommandType = CommandType.StoredProcedure; 
            
            command.Parameters.Add("@productID",SqlDbType.Int); 
            command.Parameters["@productID"].Value = dgProduct.DataKeys[e.Item.ItemIndex]; 
            command.ExecuteNonQuery(); 
            BindDataGrid(); 
        } 
        //实现删除确认及颜色交替显示功能 
        private void dgProduct_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) 
        { 
            if(e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem) 
            { 
               Button btnDelete = (Button)(e.Item.Cells[4].Controls[0]); 
               btnDelete.Attributes.Add("onClick","JavaScript:return confirm(’确定删除？’)"); 
               e.Item.Attributes.Add("onMouseOver","this.style.backgroundColor=’#FFCC66’"); 
               e.Item.Attributes.Add("onMouseOut","this.style.backgroundColor=’#ffffff’"); 
            } 
        }