//绑定的方法
using System;
using System.Collections.Generic;
using System.Web;
using System.Data;
using System.Web.UI.WebControls;
using Wuqi.Webdiyer;
 public class GridviewControl
    {
        //当Gridview数据为空时显示的信息
        private static string EmptyText = "没有记录";

        public GridviewControl()
        {

        }

        /// <summary>
        /// 防止PostBack后Gridview不能显示
        /// </summary>
        /// <param name="gridview"></param>
        public static void ResetGridView(GridView gridview)
        {
            //如果数据为空则重新构造Gridview
            if (gridview.Rows.Count == 1 && gridview.Rows[0].Cells[0].Text == EmptyText)
            {
                int columnCount = gridview.Columns.Count;
                gridview.Rows[0].Cells.Clear();
                gridview.Rows[0].Cells.Add(new TableCell());
                gridview.Rows[0].Cells[0].ColumnSpan = columnCount;
                gridview.Rows[0].Cells[0].Text = EmptyText;
                gridview.Rows[0].Cells[0].Style.Add("text-align", "center");
            }
        }

        /// <summary>
        /// 绑定数据到GridView，当表格数据为空时显示表头
        /// </summary>
        /// <param name="gridview"></param>
        /// <param name="table"></param>
        public static void GridViewDataBind(GridView gridview, DataTable table,AspNetPager pager)
        {
            //记录为空重新构造Gridview
            if (table.Rows.Count == 0)
            {
                table = table.Clone();
                table.Rows.Add(table.NewRow());
                gridview.DataSource = table;
                gridview.DataBind();
                int columnCount = gridview.Columns.Count;
                gridview.Rows[0].Cells.Clear();
                gridview.Rows[0].Cells.Add(new TableCell());
                gridview.Rows[0].Cells[0].ColumnSpan = columnCount;
                gridview.Rows[0].Cells[0].Text = EmptyText;
                gridview.Rows[0].Cells[0].Style.Add("text-align", "center");
                pager.Visible = false;
            }
            else
            {
                //数据不为空直接绑定
                /*--绑定分页--*/
                PagedDataSource pds = new PagedDataSource();
                pds.DataSource = table.DefaultView;//设置分页的数据源
                pager.RecordCount = pds.Count;//AspNetPager1.RecordCount = ds.Tables[0].DefaultView.Count;等价//获取数据的条数
                pds.AllowPaging = true;//设置允许分页
                pds.CurrentPageIndex = pager.CurrentPageIndex - 1;//设置当前页的索引
                pds.PageSize = pager.PageSize;//设置每页显示的页数
                pager.CustomInfoHTML = string.Format("当前第<span style='color:red'>{0}</span>/{1}页 共<span style='color:red'>{2}</span>条记录 每页<span style='color:red'>{3}</span>条", new object[] { pager.CurrentPageIndex, pager.PageCount, pager.RecordCount, pager.PageSize });
                gridview.DataSource = pds;
                gridview.DataBind();
                pager.Visible = true;
            }
            

            //重新绑定取消选择
            gridview.SelectedIndex = -1;
        }
        public static void GridViewDataBind(GridView gridview, DataTable table)
        {
            //记录为空重新构造Gridview
            if (table.Rows.Count == 0)
            {
                table = table.Clone();
                table.Rows.Add(table.NewRow());
                gridview.DataSource = table;
                gridview.DataBind();
                int columnCount = gridview.Columns.Count;
                gridview.Rows[0].Cells.Clear();
                grid