【分页】asp.net 通用分页显示辅助类(改进版)-辅助类

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asp.net 通用分页显示辅助类(改进版)

/// <summary>
/// 分页实用类
/// </summary>
public sealed class AspNetPager
{
#region common

private const string defaultAlign="center";//默认对齐方式
private const string leftAlign="left";
private const string rightAlign="right";

/// <summary>
/// 获取页数
/// </summary>
/// <param name="objs">总记录数</param>
/// <param name="recordCountPerPage">每页记录数</param>
/// <returns></returns>
public static int GetPageCout(object[] objs, int recordCountPerPage)
{
return (int)Math.Ceiling(((double)objs.Length / (double)recordCountPerPage));
}

/// <summary>
/// 获取页数
/// </summary>
/// <param name="totalCount">总记录数</param>
/// <param name="recordCountPerPage">每页记录数</param>
/// <returns></returns>
public static int GetPageCout(int totalCount, int recordCountPerPage)
{
int result=0;
if (totalCount % recordCountPerPage==0)
{
result=totalCount / recordCountPerPage;
}
else
{
result=totalCount / recordCountPerPage + 1;
}
return result;
}

#endregion

#region render pager

/// <summary>
/// 写分页页码(没有表格)
/// </summary>
/// <param name="pagerMode"></param>
/// <param name="response"></param>
/// <param name="baseString"></param>
/// <param name="totalCount">总记录数</param>
/// <param name="nowPage">当前页数</param>
/// <param name="recordCountPerPage">每页记录数</param>
public static void RenderPager(PagerModoule pagerMode, HttpResponse response, int totalCount, int nowPage, int recordCountPerPage, string baseString)
{
int pageCount=GetPageCout(totalCount, recordCountPerPage);
string pagerString=string.Empty;
if (pageCount > 0)
{
switch (pagerMode)
{
case PagerModoule.Normal:
pagerString=CreateLinkUrl(baseString, pageCount, nowPage, recordCountPerPage);
break;
case PagerModoule.Statistics:
pagerString=CreateStatisticLinkUrl(baseString, totalCount, pageCount, nowPage, recordCountPerPage);
break;
default:
pagerString=CreateLinkUrl(baseString, pageCount, nowPage, recordCountPerPage);
break;
}
response.Write(pagerString);
}
}

/// <summary>
/// 写分页页码(有表格)
/// </summary>
/// <param name="pagerMode"></param>
/// <param name="alignEnum"></param>
/// <param name="response"></param>
/// <param name="baseString"></param>
/// <param name="totalCount">总记录数</param>
/// <param name="nowPage">当前页数</param>
/// <param name="recordCountPerPage">每页记录数</param>
public static void RenderTablePager(PagerModoule pagerMode, TbAlignEnum alignEnum, HttpResponse response, int totalCount, int nowPage, int recordCountPerPage, string baseString)
{
int pageCount=GetPageCout(totalCount, recordCountPerPage);
if (pageCount > 0)
{
string align=string.Empty;
switch (alignEnum)
{
case TbAlignEnum.Left:
align=leftAlign;
break;
case TbAlignEnum.Center:
align=defaultAlign;
break;
case TbAlignEnum.Right:
align=rightAlign;
break;
default:
align=defaultAlign;
break;
}
StringBuilder sbTable=new StringBuilder();
sbTable.AppendFormat("<table><tr align='{0}'><td>", align);
string pagerString=string.Empty;
switch (pagerMode)
{
case PagerModoule.Normal:
pagerString=CreateLinkUrl(baseString, pageCount, nowPage, recordCountPerPage);
break;
case PagerModoule.Statistics:
pagerString=CreateStatisticLinkUrl(baseString, totalCount, pageCount, nowPage, recordCountPerPage);
break;
default:
pagerString=CreateLinkUrl(baseString, pageCount, nowPage, recordCountPerPage);
break;
}
sbTable.Append(pagerString);
sbTable.Append("</td></tr></table>");
response.Write(sbTable.ToString());
}
}

#endregion

#region create link

/// <summary>
/// 生成分页字符串(显示页数和每页记录数相关)
/// </summary>
/// <param name="baseString"></param>
/// <param name="pageCount">页数</param>
/// <param name="nowPage">当前页数</param>
/// <param name="recordCountPerPage">每页记录数(推荐记录数：10)</param>
/// <returns></returns>
private static string CreateLinkUrl(string baseString, int pageCount, int nowPage, int recordCountPerPage)
{
StringBuilder sb=new StringBuilder();
int from, to;
if (nowPage - recordCountPerPage > 0)
{
from=nowPage - recordCountPerPage;
}
else
from=1;
if (pageCount==0)
pageCount=1;
if (pageCount - nowPage - recordCountPerPage > 0)
{
to=nowPage + recordCountPerPage;
}
else
to=pageCount;

if (baseString.IndexOf("?")==-1)
baseString +="?";
else
baseString +="&";
sb.Append(string.Format("<a href=\"{0}pageIndex=1\" >首页</a>", baseString));
if (pageCount > 1 && nowPage > 1)
{
sb.AppendFormat("<a href=\"{0}pageIndex={1}\" >上一页</a>", baseString, (nowPage - 1).ToString());
}
else
{
sb.Append("<a href='javascript:void(0);' style='color:gray;' >上一页</a>");
}
for (int i=from; i <=to; i++)
{
if (i==nowPage)
{
sb.AppendFormat(" <a href='javascript:void(0);' style='color:red;' >{0}</a>", nowPage.ToString());
}
else
{
sb.AppendFormat(" <a href=\"{0}pageIndex={1}\" >{1}</a>", baseString, i);
}
}
if (pageCount > 1 && nowPage < pageCount)
{
sb.AppendFormat("<a href=\"{0}pageIndex={1}\" >下一页</a>", baseString, (nowPage + 1).ToString());
}
else
{
sb.Append("<a href=\"javascript:void(0);\" style='color:gray;' >下一页</a>");
}
sb.Append(string.Format(" <a href={0}pageIndex={1} >尾页</a>", baseString, pageCount));
return sb.ToString();
}

/// <summary>
/// 生成含统计信息的分页字符串(显示页数和每页记录数相关)
/// </summary>
/// <param name="baseString"></param>
/// <param name="totalCount">总记录数</param>
/// <param name="pageCount">页数</param>
/// <param name="nowPage">当前页数</param>
/// <param name="recordCountPerPage">每页记录数(推荐记录数：10)</param>
/// <returns></returns>
private static string CreateStatisticLinkUrl(string baseString, int totalCount, int pageCount, int nowPage, int recordCountPerPage)
{
StringBuilder sb=new StringBuilder();
string numricPager=CreateLinkUrl(baseString, pageCount, nowPage, recordCountPerPage);//普通数字分页
sb.AppendFormat("总共<span style='color:red;'>{0}</span>条记录,共<span style='color:red;'>{1}</span>页,当前第<span style='color:red;'>{2}</span>页  ",
totalCount, pageCount, nowPage);
sb.Append(numricPager);
return sb.ToString();
}

#endregion
}

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