asp.net自定义分页控件示例

一、.ascx页面

<%@ control language="c#" autoeventwireup="true" codebehind="pagination.ascx.cs" inherits="iocs.web.usercontrol.pagination" %>
<link href="../content/css/pager.css" rel="stylesheet" type="text/css" />
<div id="tbpage" class="pager" runat="server" >
    記錄總數：<asp:label id="lrecords" runat="server"></asp:label>
    總頁數：<asp:label id="lpages" runat="server"></asp:label>
    當前頁：<asp:label id="lpage" runat="server"></asp:label>

        <asp:linkbutton id="linkfirst" runat="server" commandargument="first" nclick="pagerbuttonclick"
            text="首頁"></asp:linkbutton>

        <asp:linkbutton id="linkprevious" runat="server" commandargument="prev" nclick="pagerbuttonclick"
            text="上一頁"></asp:linkbutton>

        <asp:linkbutton id="linknext" runat="server" commandargument="next" nclick="pagerbuttonclick"
            text="下一頁"></asp:linkbutton>

        <asp:linkbutton id="linklast" runat="server" commandargument="last" nclick="pagerbuttonclick"
            text="末頁"></asp:linkbutton>
    轉到第<asp:textbox id="txtpage"  cssclass="piut" runat="server"  maxlength="5" autopostback="true" ntextchanged="txtpage_textchanged"></asp:textbox>頁

二、.ascx.cs文件

using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.web.ui;
using system.web.ui.webcontrols;

namespace iocs.web.usercontrol
{
    public partial class pagination : system.web.ui.usercontrol
    {
        public event eventhandler pagebuttonclick;
        public bool firstpost = false;
        protected void page_load(object sender, eventargs e)
        {
            if (!ispostback)
            {
              

            }
            // 只輸入數字
            txtpage.attributes.add("onclick",
                @"if(!((event.keycode>=48&&event.keycode<=57)
                    ||(event.keycode>=96&&event.keycode<=105)
                    ||(event.keycode==8)))event.returnvalue=false;"
              );

        }
        gridview _gv;

        /// <summary>
        /// 需要分頁的gridview
        /// </summary>
        public gridview targetcontrolid
        {
            set
            {
                _gv = value;
            }
            get
            {
                return _gv;
            }
        }

        protected void pagerbuttonclick(object sender, eventargs e)
        {
            //獲得linkebutton的參數值
            string arg = ((linkbutton)sender).commandargument;
            switch (arg)
            {
                case ("next"):
                    {
                        if (_gv.pageindex < _gv.pagecount - 1)
                        {
                            _gv.pageindex=_gv.pageindex+1;
                        }
                        break;
                    }
                case ("prev"):
                    {
                        if (_gv.pageindex > 0)
                        {
                            _gv.pageindex--;
                        }
                        break;
                    }
                case ("first"):
                    {
                        _gv.pageindex = 0;
                        break;
                    }
                case ("last"):
                    {
                        if (_gv.pagecount > 0)
                        {
                            _gv.pageindex = _gv.pagecount - 1;
                        }
                        break;
                    }

                default:
                    {
                        _gv.pageindex = convert.toint32(arg);
                        break;
                    }
            }
            pagebuttonclick(sender, e);

        }

        

        public void setpagebutton()
        {
            if (_gv.pageindex == 0)
            {
                linkfirst.enabled = false;
                linkprevious.enabled = false;

                linkfirst.style["color"] = "gray";
                linkprevious.style["color"] = "gray";

                object s = linkfirst.style.keys;
                if (_gv.pagecount > 1)
                {
                    linknext.enabled = true;
                    linklast.enabled = true;
                    txtpage.enabled = true;
                    txtpage.enabled = true;
                    linknext.style["color"] = "#000";
                    linklast.style["color"] = "#000";
                    txtpage.style["readonly"] = "false";
                }
                else
                {
                    linknext.enabled = false;
                    linklast.enabled = false;
                    txtpage.enabled = false;
                    linknext.style["color"] = "gray";
                    linklast.style["color"] = "gray";
                    txtpage.style["readonly"] = "true";//background-color
                }
            }
            else if (_gv.pageindex == _gv.pagecount - 1)
            {
                linkfirst.enabled = true;
                linkprevious.enabled = true;
                linknext.enabled = false;
                linklast.enabled = false;
                linkfirst.style["color"] = "#000";
                linkprevious.style["color"] = "#000";
                linknext.style["color"] = "gray";
                linklast.style["color"] = "gray";
            }
            else
            {
                linkfirst.enabled = true;
                linkprevious.enabled = true;
                linknext.enabled = true;
                linklast.enabled = true;
                linkfirst.style["color"] = "#000";
                linkprevious.style["color"] = "#000";
                linknext.style["color"] = "#000";
                linklast.style["color"] = "#000";
            }
        }

        /// <summary>
        /// 設定頁面信息
        /// </summary>
        /// <param name="dscount">dataset的紀錄總數</param>

        public void setpagerecord(int dscount)
        {
            lrecords.text = dscount.tostring();
            int mod= dscount%_gv.pagesize;
            lpages.text = (mod == 0 ? dscount / _gv.pagesize : dscount / _gv.pagesize + 1).tostring();
            lpage.text = (_gv.pageindex + 1).tostring();
            tbpage.visible = true;
            setpagebutton();
        }

        protected void txtpage_textchanged(object sender, eventargs e)
        {
            if (txtpage.text != "")
            {
                try
                {
                    int index = int.parse(txtpage.text.trim());
                    if (index <= _gv.pagecount && index >= 1)
                    {
                        _gv.pageindex = index - 1;
                    }
                    else
                    {
                        page.clientscript.registerstartupscript(this.gettype(), "script", "<script. language='javascript'>alert('對不起，頁數超過索引范圍!');</script>");
                    }
                }
                catch
                {

                    page.clientscript.registerstartupscript(this.gettype(), "script", "<script. language='javascript'>alert('對不起，只能輸入數字!');</script>");
                }
            }
            pagebuttonclick(sender, e);
        }
    }
}