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DataList 控件分页操作!

作者：未知 来源：月光软件站 加入时间：2005-5-13　月光软件站

aspx 源文件

<%@ Page language="c#" Codebehind="radionj_list.aspx.cs" AutoEventWireup="false" Inherits="radio.radio.radionj_list" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>NJ列表</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<LINK href="admin/style/item.css" type="text/css" rel="stylesheet">
<style>
.normal
{
font-weight:normal
}
.bigsize
{
font-weight:bold;
}

<!-- asthlon发表于 05 3-25 -->
</style>

</HEAD>
<body MS_POSITIONING="GridLayout"> <!--<table border="0" cellspacing="0" cellpadding="0">

</table>-->
<form id="Form1" method="post" runat="server">
<div align="center">
<asp:datalist id="info_data" runat="server" ShowFooter="False" GridLines="Both" BorderColor="Control"
RepeatColumns="2" RepeatDirection="Horizontal" HorizontalAlign="Center" ShowHeader="False"
CellPadding="5" BorderWidth="0px" RepeatLayout="Flow">
<ItemStyle HorizontalAlign="Center" Height="120px" Width="140px" VerticalAlign="Middle"></ItemStyle>
<ItemTemplate>
<table cellspacing="0" cellpadding="0">
<tr>
<td><img src="../images/r_7_11.jpg"></td>
<td valign="middle" bgcolor="#fecc00" align="center"><a href='<%# DataBinder.Eval(Container.DataItem,"id","radio_nj_info.aspx?id={0}") %>'>
<div style="overflow:hidden;width:90px;height:90px;"><img width=90 src='<%# Return_Nj_Detail((string)DataBinder.Eval(Container.DataItem,"content"),1)%>'></div>
</a>
</td>
<Td><img src="../images/r_7_13.jpg"></Td>
</tr>
</table>
</ItemTemplate>
</asp:datalist>
<div style="PADDING-LEFT:40px"><FONT color="#000000">共
<asp:label id="list_num" runat="server"></asp:label>条记录</FONT>
<asp:label id="list_at" runat="server"></asp:label><FONT color="#000000">&nbsp;</FONT><asp:linkbutton id="p0" runat="server" CommandName="p0"><font face="Webdings">9</font></asp:linkbutton>
<asp:linkbutton id="p1" runat="server" CommandName="p1">
<font face="Webdings">7</font></asp:linkbutton>
[<asp:PlaceHolder id="p_pagelist" runat="server"></asp:PlaceHolder>]
<asp:linkbutton id="p2" runat="server" CommandName="p2">
<font face="Webdings">8</font></asp:linkbutton>
<asp:linkbutton id="p3" runat="server" CommandName="p3">
<font face="Webdings">:</font></asp:linkbutton>
<!--
&nbsp;<asp:textbox id="atTxt" onkeyup="this.value=this.value.replace(/\D/g,'')" runat="server" Width="35px"
onafterpaste="this.value=this.value.replace(/\D/g,'')"></asp:textbox><asp:button id="Go_TO" runat="server" Text="GO"></asp:button>
-->
</div>
</div>
</form>
</body>
</HTML>

.cs 源文件

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace radio.radio
{
 /// <summary>
 /// asthlon发表于 05 3-25。
 /// </summary>
 public class radionj_list : System.Web.UI.Page
 {
  protected System.Web.UI.WebControls.DataList info_data;
  protected System.Web.UI.WebControls.Label list_num;
  protected System.Web.UI.WebControls.Label list_at;
  protected System.Web.UI.WebControls.LinkButton p0;
  protected System.Web.UI.WebControls.LinkButton p1;
  protected System.Web.UI.WebControls.LinkButton p2;
  protected System.Web.UI.WebControls.PlaceHolder p_pagelist;
  protected System.Web.UI.WebControls.LinkButton p3;
 
  private void Page_Load(object sender, System.EventArgs e)
  {
   if(!IsPostBack)
   {
    WebUse.SqlEC.DataBase dItem = new WebUse.SqlEC.DataBase();
    string sql = "select count(id) from radio_dj";
    ViewState["curpage"] = 0;
    ViewState["pcount"] = dItem.StrSql_TxtSql(sql);
    Bind_List();
    Post_Control();
   }
   else
   {
    Post_Control();
   }
   // 在此处放置用户代码以初始化页面
  }
  private void Bind_List()
  {
   int Psize = 10;
   int sIndex,len,at;
   float f;
   WebUse.SqlEC.DataBase dItem = new WebUse.SqlEC.DataBase();
   len = Convert.ToInt32(Math.Ceiling(Convert.ToInt32(ViewState["pcount"]) / Psize));//+1
   f = Convert.ToSingle(ViewState["pcount"]) / Psize ;
   if(f > Convert.ToInt32(Convert.ToInt32(ViewState["pcount"]) / Psize))
   {
    len = len + 1;
   }


   sIndex = Convert.ToInt32(ViewState["curpage"]) * Psize;
   SqlDataAdapter adp = new System.Data.SqlClient.SqlDataAdapter();
   DataSet ds = new DataSet();
   adp = dItem.Read_Adapter_NoArg("radio_dj_sel");//dItem.Read_Adapter_TxtSql(sql);
   adp.Fill(ds,sIndex,Psize,"show");
   info_data.DataSource = ds;
   info_data.DataBind();

   at = Convert.ToInt32(ViewState["curpage"]);
   if(at <=0)
   {
    p0.Enabled = false;
    p1.Enabled = false;
   }
   else
   {
    p1.Enabled = true;
    p0.Enabled = true;
   }
   if(at >= len-1)
   {
    p2.Enabled = false;
    p3.Enabled = false;
   }
   else
   {
    p2.Enabled = true;
    p3.Enabled = true;
   }
   list_num.Text = Convert.ToString(ViewState["pcount"]);
   list_at.Text = Convert.ToString(sIndex / Psize + 1) + "/" + len.ToString() ;
   Clear_LinkButton_Style();
  }
  private void go_page(object sender, System.Web.UI.WebControls.CommandEventArgs e)
  {
   string cmdName;
   int sIndex = Convert.ToInt32(ViewState["curpage"]);
   int len = Convert.ToInt32(Math.Ceiling(Convert.ToInt32(ViewState["pcount"]) / 10));
   cmdName = e.CommandName;
   switch(cmdName)
   {
    case "p0":
     sIndex = 0;
     break;
    case "p1":
     sIndex -= 1;
     break;
    case "p2":
     sIndex +=1;
     break;
    case "p3":
     sIndex = len;
     break;
   }
   ViewState["curpage"] = sIndex;
   Bind_List();
  }

  private void Post_Control()
  {
   int i;
   int len = Convert.ToInt32(Math.Ceiling(Convert.ToInt32(ViewState["pcount"]) / 10));
   float f = Convert.ToSingle(ViewState["pcount"]) / 10 ;
   if(f > Convert.ToInt32(Convert.ToInt32(ViewState["pcount"]) / 10))
   {
    len = len + 1;
   }
   this.p_pagelist.Controls.Clear();
   string s = "";
   //int curpage = Convert.ToInt32(ViewState["curpage"]);
   for(i=1;i<=len;i++)
   {
    System.Web.UI.WebControls.LinkButton lkbtn = new LinkButton();
    s = " " + i.ToString() + " ";
    lkbtn.Text = s;
    lkbtn.CommandArgument = i.ToString();
    this.p_pagelist.Controls.Add(lkbtn);
    lkbtn.Command += new CommandEventHandler(lkbtn_Command);
   }
  }
  private void Clear_LinkButton_Style()
  {
   int curpage = Convert.ToInt32(ViewState["curpage"])+1;
   foreach(Control ictrl in this.p_pagelist.Controls)
   {
    if(ictrl.GetType().ToString().ToUpper().IndexOf("LINKBUTTON")>0)
    {
     LinkButton ilkbtn = (LinkButton)ictrl;
     if(ilkbtn.CommandArgument.ToString() == curpage.ToString())
     {
      ilkbtn.CssClass = "bigsize";
     }
     else
     {
      ilkbtn.CssClass ="normal";
     }
    }
   }
  }
  private void lkbtn_Command(object sender, System.Web.UI.WebControls.CommandEventArgs e)
  {
   int gos,sIndex;
   int len = Convert.ToInt32(Math.Ceiling(Convert.ToInt32(ViewState["pcount"]) / 10));
   if(e.CommandArgument == null)
   {
    return;
   }
   sIndex = 0;
   gos = Convert.ToInt32(e.CommandArgument);
   //Clear_LinkButton_Style();
   //LinkButton lkbtn = (LinkButton)sender;//
   //lkbtn.CssClass = "bigsize";
   if(gos<=0)
   {
    sIndex = 0;
   }
   else
   {
    if(gos>= len + 1)
    {
     sIndex = len;
    }
    else
    {
     sIndex = gos-1;
    }
    
   }
   ViewState["curpage"] = sIndex;
   Bind_List();
  }
  /**
  private void Go_TO_Click(object sender, System.EventArgs e)
  {
   int gos,sIndex;
   int len = Convert.ToInt32(Math.Ceiling(Convert.ToInt32(ViewState["pcount"]) / 9));
   if(atTxt.Text == "")
   {
    return;
   }
   sIndex = 0;
   gos = Convert.ToInt32(atTxt.Text);
   if(gos<=0)
   {
    sIndex = 0;
   }
   else
   {
    if(gos>= len + 1)
    {
     sIndex = len;
    }
    else
    {
     sIndex = gos-1;
    }
    
   }
   ViewState["curpage"] = sIndex;
   Bind_List();
  }
  **/
  /// <summary>
  /// 取得NJ娱乐信息
  /// </summary>
  /// <param name="t"></param>
  /// <param name="i"></param>
  /// <returns></returns>
  public string Return_Nj_Detail(string t,int i)
  {
   string rstr=null;
   string[] istr = t.Split(',');
   rstr = istr[i];
   return rstr;
   
  }

  #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.p0.Command += new System.Web.UI.WebControls.CommandEventHandler(this.go_page);
   this.p1.Command += new System.Web.UI.WebControls.CommandEventHandler(this.go_page);
   this.p2.Command += new System.Web.UI.WebControls.CommandEventHandler(this.go_page);
   this.p3.Command += new System.Web.UI.WebControls.CommandEventHandler(this.go_page);
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion
 }
}

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