新手写自定义分页控件

    本人初次写自定义控件.

 

   下面是一个自定义分页控件,用户可以通过传入记录总数和每页显示的记录数来实现分页导航.

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace pagerControls
{
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:WebCustomControlPager runat=server></{0}:WebCustomControlPager>")]
    public class WebCustomControlPager : WebControl
    {
         
        [Bindable(true)]
        [CategoryAttribute("Appearance")]
        [DefaultValue("")]
        [Localizable(true)]
        public virtual string Text
        {
            get
            {
                String s = (String)ViewState["Text"];
                return ((s == null) ? String.Empty : s);
            }

            set
            {
                ViewState["Text"] = value;
            }
        }
        private int _currentPageIndex;
        /**//// <summary>
        /// 当前页面索引
        /// </summary>
        [Bindable(true)]
        [CategoryAttribute("Appearance")]
        [Localizable(true)]
        [DescriptionAttribute("当前页面索引从1开始")]
        [DefaultValueAttribute("当前页面索引")]
        public virtual int currentPageIndex
        {
            get
            {
                return this._currentPageIndex;
            }

            set
            {
                this._currentPageIndex = value;
            }
        }
        private int _iRecordCount=1;
        /**//// <summary>
        /// 记录数量
        /// </summary>
        [Bindable(true)]
        [CategoryAttribute("Appearance")]
        [Localizable(true)]
        [DescriptionAttribute("记录数量")]
        [DefaultValueAttribute("记录数量")]
        public virtual int iRecordCount
        {
            get
            {
                return this._iRecordCount;
               
            }

            set
            {
                this._iRecordCount = value;
            }
        }
        private int _iRowsCount=10;
        /**//// <summary>
        /// 每页记录数量
        /// </summary>
        [Bindable(true)]
        [CategoryAttribute("Appearance")]
        [Localizable(true)]
        [DescriptionAttribute("每页记录数量")]
        [DefaultValueAttribute("每页记录数量")]
        public virtual int iRowsCount
        {
            get
            {
                return this._iRowsCount;
                
            }

            set
            {
                this._iRowsCount = value;
            }
        }
        private int _iPrevCount=5;
        /**//// <summary>
        /// 前部分记录数量
        /// </summary>
        [Bindable(true)]
        [CategoryAttribute("Appearance")]
        [Localizable(true)]
        [DescriptionAttribute("前部分记录数量")]
        [DefaultValueAttribute("前部分记录数量")]
        public virtual int iPrevCount
        {
            get
            {
                return this._iPrevCount;
                
            }

            set
            {
                this._iPrevCount = value;
            }
        }
        private int _iNextCount=5;
        /**//// <summary>
        /// 后部分记录数量
        /// </summary>
        [Bindable(true)]
        [CategoryAttribute("Appearance")]
        [Localizable(true)]
        [DescriptionAttribute("后部分记录数量")]
        [DefaultValueAttribute("后部分记录数量")]
        public virtual int iNextCount
        {
            get
            {
                
                return this._iNextCount  ;
                
            }

            set
            {
                this._iNextCount = value;
            }
        }
        protected override void RenderContents(HtmlTextWriter output)
        {
            //分页样式表信息
            string sStyle = "";
            StringBuilder strbStyle = new StringBuilder();
            sStyle = "<style type =\"text/css\" >";
            strbStyle.Append(sStyle);
            sStyle = ".a4:link,.a4:visited,.a4:active{color:#207FC3;font-size:12px;text-decoration:none;}";
            strbStyle.Append(sStyle);
            sStyle = ".a4:hover{color:#ff6600;font-size:12px;text-decoration:none;}";
            strbStyle.Append(sStyle);
            sStyle = ".a5:link,.a5:visited,.a5:active{color:#ffffff;font-size:12px;text-decoration:none;}";
            strbStyle.Append(sStyle);
            sStyle = ".a5:hover{color:#ffffff;font-size:12px;text-decoration:none;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv {float:left;width:950px;height:22px; margin-top:15px;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv .pagedivcenter { width:600px; margin: 0 auto;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv .page { float:left;width:auto;font-family: Verdana, Arial, Helvetica, sans-serif;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv .page .select{float:left;height:16px;line-height:16px;padding:0 4px 0 4px;display:block;border:solid 1px #207FC3;margin:0 2px 0 2px;background-color:#207FC3;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv .page .num{float:left;height:16px;line-height:16px;padding:0 4px 0 4px;display:block;border:solid 1px #207FC3;margin:0 2px 0 2px;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv .page span{float:left;height:18px;line-height:18px;display:block;margin:0 4px 0 4px;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv_nodiv { float:left; width:230px; height:auto; border:solid 1px #C2E8C7; background-color:#FBFFFB; padding:5px;}";
            strbStyle.Append(sStyle);
            sStyle = ".survey_pagediv_nodiv1 { float:left; width:230px; height:155px; border:solid 1px #FFD4E3; background-color:#FFFCFE; padding:5px; text-align:center; line-height:155px;}";
            strbStyle.Append(sStyle);
            sStyle = "</style>";
            strbStyle.Append(sStyle);
            //分页信息
            string sPagerHtml = "";
            sPagerHtml = this.CSgetPagerHtml(this .iRecordCount , this .iRowsCount , this.Text, this .currentPageIndex );
            sPagerHtml = strbStyle.ToString() + sPagerHtml;
            output.Write(sPagerHtml);
        }
        
        /**//// <summary>
        /// 取得分页信息
        /// by minjiang 08-3-11
        /// </summary>
        /// <param name="recordCount">记录总数</param>
        /// <param name="iRowsCount">每页记录大小</param>
        /// <param name="pageUrl">页面地址</param>
        /// <returns></returns>
        public string CSgetPagerHtml(int recordCount, int iRowsCount, string pageUrl, int  iCurrentPageIndex)
        {
            int intPrevPageCount = this .iPrevCount ;
            int intNextPageCount = this .iNextCount ;
            //如果小于此数字则不显示省略号
            int intDefaultCount = 10;
            StringBuilder strb = new StringBuilder();
            string info = "";
            info = "<div class=\"survey_pagediv\"><div class=\"pagedivcenter\"><div class=\"page\">";
            strb.Append(info);
            //链接地址
            if (pageUrl.IndexOf("page=") != -1)
            {
                int pageIndex = pageUrl.IndexOf("page=");
                pageUrl = pageUrl.Substring(0, pageIndex + 5);



            }
            else
            {
                //如果页面没有任何参数则加上?与参数
                if (pageUrl.IndexOf("?") == -1)
                {
                    pageUrl += "?page=";

                }
                else
                {
                    //如果只是没有page参数则加上些参数
                    pageUrl += "&page=";

                }

            }
            //页面总数
            int pageCount = 1;
            if (recordCount > 0)
            {
                if (recordCount % iRowsCount == 0)
                { pageCount = recordCount / iRowsCount; }
                else
                {
                    pageCount = recordCount / iRowsCount + 1;

                }

            }

            int currentPage = iCurrentPageIndex ;
            //int.TryParse(sCurrentPageIndex, out currentPage);
            if (currentPage < 1)
            {
                currentPage = 1;


            }
            //上一页索引
            int prevPage = 1;
            prevPage = currentPage - 1;
            if (prevPage < 1)
            { prevPage = 1; }
            //下一页索引
            int nextPage = 1;
            nextPage = currentPage + 1;
            if (nextPage > pageCount)
            { nextPage = 1; }
            //开始的索引页
            int startPageIndex = currentPage;
            //要统计的页面总数
            int pageTotalCount = pageCount - currentPage + 1;
            info = "<span><a href=\"" + pageUrl + prevPage.ToString() + "\">&lt;&lt;上一页</a></span>";
            strb.Append(info);
            string pageClass = "num a4";
            //当前页的样式为select a5
            //如果页数小于等于10页则不显示省略号
            if (pageCount <= intDefaultCount)
            {
                for (int kk = 1; kk <= pageCount; kk++)
                {
                    pageClass = "num a4";
                    if (kk == currentPage)
                    {
                        pageClass = "select a5";


                    }
                    info = "<a href=\"" + pageUrl + kk.ToString() + "\" class=\"" + pageClass + "\">" + kk.ToString() + "</a>";
                    strb.Append(info);

                }
                //下一页地址
                info = "<span><a href=\"" + pageUrl + nextPage.ToString() + "\">下一页&gt;&gt;</a></span>";
                strb.Append(info);
                info = strb.ToString();
                return info;

            }
            //省略号前显示5页
            if (pageTotalCount <= intPrevPageCount)
            {
                for (int k = currentPage; k <= pageCount; k++)
                {
                    pageClass = "num a4";
                    if (k == currentPage)
                    {
                        pageClass = "select a5";

                    }
                    info = "<a href=\"" + pageUrl + k.ToString() + "\" class=\"" + pageClass + "\">" + k.ToString() + "</a>";
                    strb.Append(info);

                }



            }
            else
            {

                for (int k = currentPage; k <= currentPage + intPrevPageCount - 1; k++)
                {
                    pageClass = "num a4";
                    if (k == currentPage)
                    {
                        pageClass = "select a5";

                    }
                    info = "<a href=\"" + pageUrl + k.ToString() + "\" class=\"" + pageClass + "\">" + k.ToString() + "</a>";
                    strb.Append(info);

                }

                info = " <span></span>";
                strb.Append(info);

                //开始索引
                int _iNextSatrIndex = currentPage + intPrevPageCount;
                //剩下页面个数
                int lastPages = pageCount - _iNextSatrIndex + 1;
                if (lastPages >= intNextPageCount)
                {
                    for (int j = pageCount - intNextPageCount + 1; j <= pageCount; j++)
                    {
                        pageClass = "num a4";
                        if (j == currentPage)
                        {
                            pageClass = "select a5";

                        }
                        info = "<a href=\"" + pageUrl + j.ToString() + "\" class=\"" + pageClass + "\">" + j.ToString() + "</a>";
                        strb.Append(info);


                    }

                }
                else
                {
                    for (int jj = _iNextSatrIndex; jj <= pageCount; jj++)
                    {
                        pageClass = "num a4";
                        if (jj == currentPage)
                        {
                            pageClass = "select a5";

                        }
                        info = "<a href=\"" + pageUrl + jj.ToString() + "\" class=\"" + pageClass + "\">" + jj.ToString() + "</a>";
                        strb.Append(info);

                    }

                }



            }

            info = "<span><a href=\"" + pageUrl + nextPage.ToString() + "\">下一页&gt;&gt;</a></span>";
            strb.Append(info);
            info = "</div></div></div>";
            strb.Append(info);
            info = strb.ToString();
            return info;

        }
    }
}

  

    这个控件的缺陷在于不能控制文本的样式。

 

 

   上面是效果图