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() + "\"><<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>></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>></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
