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标题: 使用DataGrid实现自定分页的例子 [打印本页]

作者: webptr 时间: 2007-9-19 23:45
标题: 使用DataGrid实现自定分页的例子
MSSQL中建立一张表t_dict，包括四个字段FDictid(int)，FNameCn(varchar)，FNameEn(varchar)，FNote(text)

<body>
   <form id="DictList" method="post" runat="server">
         <TABLE style="BORDER-COLLAPSE: collapse" cellSpacing="0" width="100%" border="1">
            <TR>
               <td bgColor="#c0c000">信息：<FONT face="Arial" color="#ffffff">数据维护</FONT>
               </td>
            </TR>
            <tr>
               <td><FONT face="宋体"></FONT></td>
            </tr>
            <tr>
               <td><asp:datagrid id="MyDataGrid" runat="server" DataKeyField="FDictid" AutoGenerateColumns="False"
                        AllowPaging="True" Width="100%">
                        <SelectedItemStyle BackColor="#FFC080"></SelectedItemStyle>
                        <HeaderStyle BackColor="#C0C000"></HeaderStyle>
                        <Columns>
                           <asp:ButtonColumn Text="选择" HeaderText="选择" CommandName="Select">
                                 <HeaderStyle Font-Bold="True" HorizontalAlign="Center" Width="8%"></HeaderStyle>
                                 <ItemStyle Font-Bold="True" HorizontalAlign="Center"></ItemStyle>
                           </asp:ButtonColumn>
                           <asp:BoundColumn DataField="FDictID" HeaderText="标识号">
                                 <HeaderStyle Width="15%"></HeaderStyle>
                           </asp:BoundColumn>
                           <asp:BoundColumn DataField="FNameCn" HeaderText="名称">
                                 <HeaderStyle Width="15%"></HeaderStyle>
                           </asp:BoundColumn>
                           <asp:BoundColumn DataField="FNameEn" HeaderText="英文名称">
                                 <HeaderStyle Width="15%"></HeaderStyle>
                           </asp:BoundColumn>
                           <asp:BoundColumn DataField="FNote" HeaderText="描叙">
                                 <HeaderStyle Width="47%"></HeaderStyle>
                           </asp:BoundColumn>
                        </Columns>
                        <PagerStyle Visible="False"></PagerStyle>
                     </asp:datagrid></td>
            </tr>
         </TABLE>
         <TABLE style="BORDER-COLLAPSE: collapse" cellSpacing="0" width="100%" bgColor="#ff9966"
            border="1">
            <TR>
               <td align="right"><asp:linkbutton id="btnFirst" runat="server" CommandArgument="fist">首页</asp:linkbutton>
                     <asp:linkbutton id="btnPrev" runat="server" CommandArgument="prev">上一页</asp:linkbutton>
                     <asp:linkbutton id="btnNext" runat="server" CommandArgument="next">下一页</asp:linkbutton>
                     <asp:linkbutton id="btnLast" runat="server" CommandArgument="last">末页</asp:linkbutton>
                     <asp:label id="lblCurrentIndex" runat="server"></asp:label>/<asp:label id="lblPageCount" runat="server"></asp:label>
                     跳转到<asp:textbox id="txtGoPage" runat="server" Width="30px" CssClass="textbox"></asp:textbox>
                     <asp:button id="btnGo" runat="server" Width="29px" CssClass="button" Text="GO"></asp:button></td>
            </TR>
         </TABLE>
   </form>
</body>

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;

namespace CrystalReport
{
/// <summary>
/// DataGridcustom 的摘要说明。
/// </summary>
public class DataGridcustom : System.Web.UI.Page
{
   protected System.Web.UI.WebControls.DataGrid MyDataGrid;
   protected System.Web.UI.WebControls.LinkButton btnFirst;
   protected System.Web.UI.WebControls.LinkButton btnPrev;
   protected System.Web.UI.WebControls.LinkButton btnNext;
   protected System.Web.UI.WebControls.LinkButton btnLast;
   protected System.Web.UI.WebControls.Label lblCurrentIndex;
   protected System.Web.UI.WebControls.Label lblPageCount;
   protected System.Web.UI.WebControls.TextBox txtGoPage;
   protected System.Web.UI.WebControls.Button btnGo;

   private void Page_Load(object sender, System.EventArgs e)
   {
         // 在此处放置用户代码以初始化页面
         if (!IsPostBack)
            BindGrid();
   }

   public void BindGrid()
   {
         SqlConnection myConnection = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnString"]);
         string strSql ="SELECT * FROM t_dict order by FDictID desc";
         SqlDataAdapter myCommand = new SqlDataAdapter(strSql, myConnection);
         DataSet ds = new DataSet();
         myCommand.Fill(ds, "t_dict");
         MyDataGrid.DataSource=ds.Tables["t_dict"].DefaultView;
         MyDataGrid.DataBind();
         ShowStatsPage();
   }

   private void PagerButtonClick(object sender, System.EventArgs e)
   {
         //获得LinkButton的参数值
         String arg = ((LinkButton)sender).CommandArgument;

         switch(arg)
         {
            case ("next"):
               if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
                     MyDataGrid.CurrentPageIndex ++;
               break;
            case ("prev"):
               if (MyDataGrid.CurrentPageIndex > 0)
                     MyDataGrid.CurrentPageIndex --;
               break;
            case ("fist"):
               MyDataGrid.CurrentPageIndex=0;
               break;
            case ("last"):
               MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
               break;
            default:
               //本页值
               MyDataGrid.CurrentPageIndex = Convert.ToInt32(arg);
               break;
         }
         BindGrid();
   }

   void ShowStatsPage()
   {
         //显示页面信息
         lblCurrentIndex.Text = "[<font color=\"blue\">当前为第：" + ((int)MyDataGrid.CurrentPageIndex+1) + "页</font>]";
         lblPageCount.Text = "[<font color=\"blue\">共：" + MyDataGrid.PageCount + "页</font>]";
   }

   #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.MyDataGrid.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.MyDataGrid_PageIndexChanged);
         this.btnFirst.Click += new System.EventHandler(this.PagerButtonClick);
         this.btnPrev.Click += new System.EventHandler(this.PagerButtonClick);
         this.btnNext.Click += new System.EventHandler(this.PagerButtonClick);
         this.btnLast.Click += new System.EventHandler(this.PagerButtonClick);
         this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
         this.Load += new System.EventHandler(this.Page_Load);

   }
   #endregion

   private void MyDataGrid_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
   {
         //处理按下数字的方法
         MyDataGrid.CurrentPageIndex = e.NewPageIndex;
         BindGrid();

   }

   private void btnGo_Click(object sender, System.EventArgs e)
   {
         //页面直接跳转的代码
         if(txtGoPage.Text.Trim()!="")
         {
            int PageI=Int32.Parse(txtGoPage.Text.Trim())-1;
            if (PageI >=0 && PageI < (MyDataGrid.PageCount))
               MyDataGrid.CurrentPageIndex = PageI ;
         }
         BindGrid();

   }

   private void btnFirst_Click(object sender, System.EventArgs e)
   {

   }

   private void btnPrev_Click(object sender, System.EventArgs e)
   {

   }

   private void btnNext_Click(object sender, System.EventArgs e)
   {

   }

   private void btnLast_Click(object sender, System.EventArgs e)
   {

   }
}
}

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