using System.ComponentModel;

using System.Web.UI;

[assembly: TagPrefix("Jinlong.Control", "Jinlong")]

namespace Jinlong.Control

{

    /// <summary>

    /// JRepeater控件

    /// Create by Jinlong Zhang

    /// </summary>

    [DefaultProperty("Text"), ToolboxData("<!--Repeater Begin --><div class=\"BigDiv_rep\"> <{0}:Repeater ID=\"Rep_List\" runat=server EnableViewState=\"false\" OnPreRender=\"Rep_List_PreRender\"> <HeaderTemplate><div class=\"BigDiv_Title_rep\"> <ul> <li style=\"line-height:22px;\"> <asp:CheckBox ID=\"TopCheckBox\" runat=\"server\" Text=\"ID\" EnableViewState=\"false\"/> </li><li style=\"width:10%;\"> </li>  </ul> </div> </HeaderTemplate><ItemTemplate><div class=\"BigDiv_line_rep\"  onmouseover=\"javascript:this.style.backgroundColor='#EEF8F9'\" onmouseout=\"javascript:this.style.backgroundColor='#FFFFFF'\"><ul ><li style=\"line-height:22px;\"><asp:CheckBox ID=\"ItemCheckBox\" runat=\"server\" Text='<%# Eval(\"ID\") %>'  EnableViewState=\"false\"/></li><li style=\"width:10%;\"></li></ul></div></ItemTemplate>   <FooterTemplate><div class=\"DelAllButton\"><asp:Button ID=\"btn_DelAll\" runat=\"server\" onclick=\"btn_DelAll_Click\"  CssClass=\"btn_DelAllCss\"  Text=\"删除\"  EnableViewState=\"false\"/></div></FooterTemplate></{0}:Repeater></div><!--Repeater End -->")]

    public class Repeater : System.Web.UI.WebControls.Repeater

    {

        private int _recordcount = 0;

        private int _pagesize = 0;

        private string _pagelink = "";

        private int _currentpage = 1;

        /// <summary>

        /// 构造函数

        /// </summary>

        public Repeater()

		{

        }

        #region __________属性__________

        [Bindable(true), Category("Data"), DefaultValue("1"), Description("记录总数")]

        public int RecordCount

        {

            get

            {

                return _recordcount;

            }

            set

            {

                _recordcount = value;

            }

        }

        [Bindable(true), Category("Data"), DefaultValue("1"), Description("每页显示记录数")]

        public int PageSize

        {

            get

            {

                return _pagesize;

            }

            set

            {

                _pagesize = value;

            }

        }

        [Bindable(true), Category("Data"), DefaultValue(""), Description("当前页链接")]

        public string PageLink

        {

            get

            {

                return _pagelink;

            }

            set

            {

                _pagelink = value;

            }

        }

        [Bindable(true), Category("Data"), DefaultValue("1"), Description("当前页")]

        public int CurrentPage

        {

            get

            {

                return _currentpage;

            }

            set

            {

                _currentpage = value;

            }

        }

        #endregion

        /// <summary>

        /// 输出html,在浏览器中显示控件

        /// </summary>

        /// <param name="output"> 要写出到的 HTML 编写器 </param>

        protected override void Render(HtmlTextWriter output)

        {

            base.Render(output);

            output.WriteLine("<div class=\"PageLink\">" + Pagination(_recordcount, _pagesize, _currentpage, _pagelink) + "</div>");

        }

        /// <summary>

        /// 分页函数

        /// </summary>

        /// <param name="recordcount">总记录数</param>

        /// <param name="pagesize">每页记录数</param>

        /// <param name="currentpage">当前页数</param>

        /// <param name="url">Url参数</param>

        /// <returns></returns>

        public string Pagination(int recordcount, int pagesize, int currentpage, string url)

        {

            int allcurrentpage = 0;

            int next = 0;

            int pre = 0;

            int startcount = 0;

            int endcount = 0;

            string currentpagestr = "";

            if (currentpage < 1) { currentpage = 1; }

            //计算总页数

            if (pagesize != 0)

            {

                allcurrentpage = (recordcount / pagesize);

                allcurrentpage = ((recordcount % pagesize) != 0 ? allcurrentpage + 1 : allcurrentpage);

                allcurrentpage = (allcurrentpage == 0 ? 1 : allcurrentpage);

            }

            next = currentpage + 1;

            pre = currentpage - 1;

            startcount = (currentpage + 5) > allcurrentpage ? allcurrentpage - 9 : currentpage - 4;//中间页起始序号

            //中间页终止序号

            endcount = currentpage < 5 ? 10 : currentpage + 5;

            if (startcount < 1) { startcount = 1; } //为了避免输出的时候产生负数，设置如果小于1就从序号1开始

            if (allcurrentpage < endcount) { endcount = allcurrentpage; }//页码+5的可能性就会产生最终输出序号大于总页码，那么就要将其控制在页码数之内

            currentpagestr = "共" + allcurrentpage + "页      ";

            currentpagestr += currentpage > 1 ? "<a href=\"" + url + "?page=1\">首页</a>  <a href=\"" + url + "?page=" + pre + "\">上一页</a>" : "首页 上一页";

            //中间页处理，这个增加时间复杂度，减小空间复杂度

            for (int i = startcount; i <= endcount; i++)

            {

                currentpagestr += currentpage == i ? "  <font color=\"#ff0000\">" + i + "</font>" : "  <a href=\"" + url + "?page=" + i + "\">" + i + "</a>";

            }

            currentpagestr += currentpage != allcurrentpage ? "  <a href=\"" + url + "?page=" + next + "\">下一页</a>  <a href=\"" + url + "?page=" + allcurrentpage + "\">末页</a>" : " 下一页 末页";

            return currentpagestr;

        }

    }

}