类似土豆的C#分页算法
时间：2011-05-11 来源：Warner
新童鞋可以拿来做参考哈，老童鞋请自己写
====================================================
// 请保留作者版权
// Author:warner
// ZHSoft.inc
using System;
using System.Collections.Generic;
using System.Text;
namespace ZHSoft.Components
{
public class Units
{
public static string[] GetPages(long count, int pageSize, int pageNo)
{
string[] data = null;
int pageCount = count > pageSize ? (int)Math.Round(Convert.ToDecimal(count / pageSize)) : 1;
int n = 0;
#region 小于10页的处理方式
if (pageCount <= 10)
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[i] = Convert.ToString(i + 1);
n++;
}
}
#endregion
else
{
//大于等于10页的处理方式
#region 当前页在第1页和第9页之间
if (pageNo >= 0 && pageNo < 9)
{
#region 如果总页面大于12页情况,则省略中间项只显示1-10页和最后2页
if (pageCount > 12)
{
data = new string[12];
for (int i = 0; i < pageCount; i++)
{
if (i <= 8 && n < data.Length)
{
data[n] = Convert.ToString(i + 1);
n++;
}
else
{
if (i <= pageCount - 3)
{
if (n == 9)
{
data[n] = "...";
n++;
}
}
else
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
}
}
#endregion
else
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
}
#endregion
//当前页在第10页和第pageCount-8页之间
else if (pageNo >= 9 && pageNo <= pageCount - 7)
{
if (pageCount <= 13)
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[i] = Convert.ToString(i + 1);
}
}
else
{
data = new string[11];
for (int i = 0; i < pageCount; i++)
{
if ((i == 0 || i == 1 || i == pageCount - 1 || i == pageCount - 2) && n < data.Length)
{
data[n] = Convert.ToString(i + 1);
n++;
}
else if ((i == 2 || i == pageCount - 3) && n < data.Length)
{
data[n] = "...";
n++;
}
else if ((i > 3 && i < pageCount - 3) && n < data.Length)
{
// 在页数大于2 and 页数小于 总数 - 3
if (i > pageNo - 4 && i < pageNo + 2)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
}
}
}
//当前页在第pageCount-8到pageCount页之间
else
{
if (pageCount <= 13)
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
else
{
data = new string[11];
for (int i = 0; i < pageCount; i++)
{
if (i == 0 || i == 1 || (i >= pageCount - 8 && i <= pageCount - 1))
{
if (n < 11)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
else if (i == 2)
{
data[n] = "...";
n++;
}
else { }
}
}
}
}
return data;
}
/// <summary>
/// 获取分页数据源
/// </summary>
/// <param name="count">返回的查询记录总数</param>
/// <param name="pageSize">页面大小</param>
/// <param name="pageIndex">当前页面</param>
/// <returns></returns>
public static string[] GetPages(int count, int pageSize, int pageIndex)
{
string[] data = null;
int pageCount = count > pageSize ? (int)Math.Round(Convert.ToDecimal(count / pageSize)) : 1;
int n = 0;
#region 小于10页的处理方式
if (pageCount <= 10)
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[i] = Convert.ToString(i + 1);
n++;
}
}
#endregion
else
{
//大于等于10页的处理方式
#region 当前页在第1页和第9页之间
if (pageIndex >= 0 && pageIndex < 9)
{
#region 如果总页面大于12页情况,则省略中间项只显示1-10页和最后2页
if (pageCount > 12)
{
data = new string[12];
for (int i = 0; i < pageCount; i++)
{
if (i <= 8 && n < data.Length)
{
data[n] = Convert.ToString(i + 1);
n++;
}
else
{
if (i <= pageCount - 3)
{
if (n == 9)
{
data[n] = "...";
n++;
}
}
else
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
}
}
#endregion
else
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
}
#endregion
//当前页在第10页和第pageCount-8页之间
else if (pageIndex >= 9 && pageIndex <= pageCount - 7)
{
if (pageCount <= 13)
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[i] = Convert.ToString(i + 1);
}
}
else
{
data = new string[11];
for (int i = 0; i < pageCount; i++)
{
if ((i == 0 || i == 1 || i == pageCount - 1 || i == pageCount - 2) && n < data.Length)
{
data[n] = Convert.ToString(i + 1);
n++;
}
else if ((i == 2 || i == pageCount - 3) && n < data.Length)
{
data[n] = "...";
n++;
}
else if ((i > 3 && i < pageCount - 3) && n < data.Length)
{
// 在页数大于2 and 页数小于 总数 - 3
if (i > pageIndex - 4 && i < pageIndex + 2)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
}
}
}
//当前页在第pageCount-8到pageCount页之间
else
{
if (pageCount <= 13)
{
data = new string[pageCount];
for (int i = 0; i < pageCount; i++)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
else
{
data = new string[11];
for (int i = 0; i < pageCount; i++)
{
if (i == 0 || i == 1 || (i >= pageCount - 8 && i <= pageCount - 1))
{
if (n < 11)
{
data[n] = Convert.ToString(i + 1);
n++;
}
}
else if (i == 2)
{
data[n] = "...";
n++;
}
else { }
}
}
}
}
return data;
}
}
}
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