cyf
112 lines
3.3 KiB
C#
112 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Zhaizj.Framework {
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public class PageHelper {
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/// <summary>
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/// 计算分页的页码
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/// </summary>
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/// <param name="count">数据量</param>
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/// <param name="pageSize">每页数量</param>
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/// <returns>总计多少页</returns>
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public static int GetPageIndex( int count, int pageSize ) {
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if (count == 0) return 1;
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int mod = count % pageSize;
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if (mod == 0) return count / pageSize;
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return count / pageSize + 1;
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}
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/// <summary>
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/// "/html/2010/11/22/195.html" => "/html/2010/11/22/195_2.html"
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/// </summary>
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/// <param name="srcUrl"></param>
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/// <param name="pageNumber"></param>
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/// <returns></returns>
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public static String AppendHtmlNo( String srcUrl, int pageNumber ) {
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if (strUtil.IsNullOrEmpty( srcUrl )) return srcUrl;
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if (pageNumber <= 1) return srcUrl;
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int lastDot = srcUrl.LastIndexOf( '.' );
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if (lastDot <= 0 || lastDot >= srcUrl.Length - 1) return srcUrl;
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String path = srcUrl.Substring( 0, lastDot );
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String ext = srcUrl.Substring( lastDot + 1, srcUrl.Length - lastDot - 1 );
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return path + "_" + pageNumber + "." + ext;
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}
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/// <summary>
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/// 在已有网址url后加上页码 Post/List.aspx=>Post/List/p6.aspx
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/// </summary>
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/// <param name="srcUrl">原始网址</param>
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/// <param name="pageNumber">页码</param>
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/// <returns></returns>
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public static String AppendNo( String srcUrl, int pageNumber ) {
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if (strUtil.IsNullOrEmpty( srcUrl )) return srcUrl;
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String url = srcUrl;
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// 查询字符串
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int qIndex = url.IndexOf( "?" );
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String query = "";
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if (qIndex > 0) {
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url = srcUrl.Substring( 0, qIndex );
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query = srcUrl.Substring( qIndex, (srcUrl.Length - qIndex) );
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}
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String ext = getExt( url );
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// 有扩展名
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if (ext.Length > 0) {
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url = strUtil.TrimEnd( url, ext );
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}
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String originalPage = getPageNumberLabel( url );
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if (originalPage.Length > 0) url = strUtil.TrimEnd( url, originalPage );
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if (pageNumber <= 1)
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return url + ext + query;
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else
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return url + "/p" + pageNumber + ext + query;
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}
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private static String getPageNumberLabel( String url ) {
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if (strUtil.IsNullOrEmpty( url )) return "";
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char separator = '/';
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String[] arr = url.Split( separator );
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if (arr.Length < 2) return "";
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String end = arr[arr.Length - 1];
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if (end.StartsWith( "p" ) && cvt.IsInt( end.Substring( 1 ) )) {
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return separator + end;
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}
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return "";
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}
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private static String getExt( String url ) {
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int dotIndex = url.LastIndexOf( "." );
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int slashIndex = url.LastIndexOf( "/" );
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if (dotIndex < 0) return "";
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if (dotIndex < slashIndex) return "";
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return url.Substring( dotIndex, (url.Length - dotIndex) );
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}
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}
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}
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