通用的分页用户控件

前台代码:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PagerList.ascx.cs" Inherits="PagerList" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>

<asp:Table width="100%" runat="server" id="tblPager" HorizontalAlign="Center" CssClass="table">
 <asp:TableRow>
 <asp:TableCell HorizontalAlign="Center" Font-Size="0.92em">
 共<asp:label id="lblRecordCount" runat="server">0</asp:label>筆
  | <asp:linkbutton id="btnFirst" runat="server" CommandArgument="fist" CssClass="fontClass">第一頁</asp:linkbutton> |
 <asp:linkbutton id="btnPrev" runat="server" CommandArgument="prev" CssClass="fontClass">
 上一頁</asp:linkbutton> | 到第
 <asp:DropDownList ID="txtGoPage" runat="server" AutoPostBack="true"></asp:DropDownList> 頁 |
 <asp:linkbutton id="btnNext" runat="server" CommandArgument="next" CssClass="fontClass">
 下一頁</asp:linkbutton> |
 <asp:linkbutton id="btnLast" runat="server" CommandArgument="last" CssClass="fontClass">
 最末頁</asp:linkbutton> | 
 第
 <asp:label id="lblCurrentIndex" runat="server">1</asp:label>頁/共
 <asp:label id="lblPageCount" runat="server">0</asp:label>頁
  
 </asp:TableCell>
 </asp:TableRow>
</asp:Table>

后台代码:

using System;
using System.Data;
using System.Drawing;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.ComponentModel;

public partial class PagerList : System.Web.UI.UserControl
{
 #region 數據綁定事件
 //public delegate void DataListPageChangedEventHandler(object sender , DataGridPageChangedEventArgs e);
 /// <summary>
 /// 數據綁定事件
 /// </summary>
 public delegate void DataBindEventHandler();
 #endregion

 #region 初始化網頁
 protected void Page_Load(object sender, EventArgs e)
 {
 // 在這裡放置使用者程式碼以初始化網頁
 if (!Page.IsPostBack)
 {
 //txtGoPage.Attributes.Add("onclick", "this.select()");
 txtGoPage.Style.Add("text-align", "center");

 ListBind();
 txtGoPage.SelectedValue = lblCurrentIndex.Text;
 }

 }
 #endregion

 #region Web Form 設計工具產生的程式碼
 protected override void OnInit(EventArgs e)
 {
 //
 // CODEGEN: 此為 ASP.NET Web Form 設計工具所需的呼叫。
 //
 this.PageIndexChanged += new DataGridPageChangedEventHandler(OnPageIndexChanged);
 InitializeComponent();
 base.OnInit(e);
 }

 /// <summary>
 /// 此為設計工具支援所必須的方法 - 請勿使用程式碼編輯器修改
 /// 這個方法的內容。
 /// </summary>
 private void InitializeComponent()
 {
 this.Load += new System.EventHandler(this.Page_Load);
 this.btnFirst.Click += new EventHandler(btnFirst_Click);
 this.btnLast.Click += new EventHandler(btnLast_Click);
 this.btnNext.Click += new EventHandler(btnNext_Click);
 this.btnPrev.Click += new EventHandler(btnPrev_Click);
 //this.btnGoPage.Click+=new EventHandler(txtGoPage_TextChanged);
 this.txtGoPage.SelectedIndexChanged += new EventHandler(txtGoPage_TextChanged);

 }
 #endregion

 #region 變量定義
 /// <summary>
 /// 綁定數據
 /// </summary>
 public event DataBindEventHandler BindData;
 /// <summary>
 /// 換頁事件
 /// </summary>
 private event DataGridPageChangedEventHandler PageIndexChanged;
 #endregion

 #region 第一頁
 private void btnFirst_Click(object sender, System.EventArgs e)
 {
 int intNewPage = 1;
 this.PageIndexChanged(this, new DataGridPageChangedEventArgs(sender, intNewPage));
 }
 #endregion

 #region 前一頁
 private void btnPrev_Click(object sender, System.EventArgs e)
 {
 int intNewPage = CurrentPageIndex - 1;
 this.PageIndexChanged(this, new DataGridPageChangedEventArgs(sender, intNewPage));
 }
 #endregion

 #region 下一頁
 private void btnNext_Click(object sender, System.EventArgs e)
 {
 int intNewPage = CurrentPageIndex + 1;
 this.PageIndexChanged(this, new DataGridPageChangedEventArgs(sender, intNewPage));
 }
 #endregion

 #region 最後一頁
 private void btnLast_Click(object sender, System.EventArgs e)
 {
 int intNewPage = PageCount;
 this.PageIndexChanged(this, new DataGridPageChangedEventArgs(sender, intNewPage));
 }
 #endregion

 #region 改變第幾頁的textbox值
 private void txtGoPage_TextChanged(object sender, System.EventArgs e)
 {
 try
 {
 int intNewPage = Convert.ToInt32(txtGoPage.SelectedValue);
 this.PageIndexChanged(this, new DataGridPageChangedEventArgs(sender, intNewPage));
 }
 catch
 {
 int intNewPage = Convert.ToInt32(lblCurrentIndex.Text);
 this.PageIndexChanged(this, new DataGridPageChangedEventArgs(sender, intNewPage));
 }
 }
 #endregion

 #region 設定link是否可以點選
 protected override void Render(System.Web.UI.HtmlTextWriter writer)
 {
 if (this.CurrentPageIndex <= 1)
 {
 btnFirst.Enabled = false;
 btnPrev.Enabled = false;
 }
 else
 {
 btnFirst.Enabled = true;
 btnPrev.Enabled = true;
 }
 if (this.CurrentPageIndex >= this.PageCount)
 {
 btnNext.Enabled = false;
 btnLast.Enabled = false;
 }
 else
 {
 btnNext.Enabled = true;
 btnLast.Enabled = true;
 }
 if (this.PageCount <= 1)
 {
 //this.btnGoPage.Enabled=false;
 txtGoPage.Enabled = false;
 }
 else
 {
 //this.btnGoPage.Enabled=true;
 txtGoPage.Enabled = true;
 }

 base.Render(writer);
 }
 #endregion

 #region 取得或設定當前頁
 /// <summary>
 /// 取得或設定當前頁
 /// </summary>
 public int CurrentPageIndex
 {
 get
 {
 if (ViewState["CurrentPageIndex"] == null) return 1;
 int _tempI=Convert.ToInt32(ViewState["CurrentPageIndex"]);
 if (_tempI < 1)
 {
 return 1;
 }
 else
 {
 return _tempI;
 }
 }
 set
 {
 ViewState["CurrentPageIndex"] = value;
 this.lblCurrentIndex.Text = CurrentPageIndex.ToString();
 }
 }
 #endregion

 /// <summary>
 /// 頁大小
 /// </summary>
 public int PageSize
 {
 get
 {
 if (ViewState["PageSize"] == null) return 10;
 return Convert.ToInt32(ViewState["PageSize"]);
 }
 set { ViewState["PageSize"] = value; }
 }

 #region 取得或設定總頁數
 /// <summary>
 /// 取得或設定總頁數
 /// </summary>
 public int PageCount
 {
 get
 {
 int pCount = 0;
 if (PageSize > 0)
 {
 pCount = RecordCount / PageSize + (RecordCount % PageSize > 0 ? 1 : 0);
 }
 return pCount;
 }
 }
 #endregion

 #region 取得或設定總筆數
 /// <summary>
 /// 取得或設定總筆數
 /// </summary>
 public int RecordCount
 {
 get
 {
 if (ViewState["RecordCount"] == null) return 0;
 return Convert.ToInt32(ViewState["RecordCount"]);
 }
 set
 {
 ViewState["RecordCount"] = value;
 this.lblRecordCount.Text = RecordCount.ToString();
 this.lblPageCount.Text = PageCount.ToString();
 ListBind();
 if (CurrentPageIndex != 0)
 {
 if (CurrentPageIndex > PageCount)
 {
 CurrentPageIndex = PageCount;
 }
 txtGoPage.SelectedValue = CurrentPageIndex.ToString();
 }
 }
 }
 #endregion

 #region 改變頁碼
 private void OnPageIndexChanged(object source, DataGridPageChangedEventArgs e)
 {
 this.CurrentPageIndex = e.NewPageIndex;
 this.BindData();
 }
 #endregion

 #region 搜索時綁定List的值(當頁面搜索動作不重新調用本頁面時使用)
 /// <summary>
 /// 搜索時綁定List的值
 /// </summary>
 private void ListBind()
 {
 txtGoPage.Items.Clear();
 for (int i = 1; i < this.PageCount + 1; i++)
 {
 txtGoPage.Items.Add(new ListItem(i.ToString(), i.ToString()));
 }
 }
 #endregion
}

通用的分页用户控件

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