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PaginationHelper.cs
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/*
* 作用：分页显示，显示格式为：数据总数 页总数 首页/前一页 N页 后一页/尾页。
* */
using System;
using System.Text;
namespace Helper.Core.Library
{
public class PaginationHelper
{
#region 私有属性常量
private const string SPAN_FORMAT = "<span class=\"{2}\">共<i class=\"{3}\">{0}</i>条数据，共<i class=\"{4}\">{1}</i>页！</span>";
private const string UL_FORMAT = "<ul class=\"{0}\" style=\"{2}\">{1}</ul>";
private const string LI_FORMAT = "<li class=\"{0}\" style=\"{3}\"><a href=\"{1}\">{2}</a></li>";
#endregion
#region 对外公开方法
/// <summary>
/// 显示分页
/// </summary>
/// <param name="paginationData">PaginationData</param>
/// <returns></returns>
public static string Page(PaginationData paginationData)
{
if (paginationData.ShowPageCount % 2 == 0) paginationData.ShowPageCount += 1;
int beginIndex = 0;
int endIndex = 0;
int halfCount = (int)Math.Floor(paginationData.ShowPageCount * 0.5f);
beginIndex = Math.Max(1, paginationData.PageIndex - halfCount);
endIndex = Math.Min(paginationData.PageCount, paginationData.PageIndex + halfCount);
if (endIndex < paginationData.PageCount) endIndex = Math.Min(beginIndex - 1 + paginationData.ShowPageCount, paginationData.PageCount);
if (beginIndex > paginationData.PageCount - paginationData.ShowPageCount) beginIndex = Math.Max(1, paginationData.PageCount - paginationData.ShowPageCount + 1);
StringBuilder stringBuilder = new StringBuilder();
if(paginationData.IsShowRecords)
{
stringBuilder.Append(string.Format(SPAN_FORMAT, paginationData.TotalCount, paginationData.PageCount, paginationData.RecordsClassName, paginationData.RecordsTotalCountClassName, paginationData.RecordsPageCountClassName));
}
#region 分页显示字符串拼装
if (paginationData.IsFull && paginationData.PageIndex > 1)
{
stringBuilder.Append(string.Format(LI_FORMAT, paginationData.ItemClassName, paginationData.PageUrl.Replace(paginationData.PageFormat, "1"), paginationData.PageFirstText, paginationData.ItemStyle));
}
if (paginationData.IsFull && paginationData.PageIndex - 1 >= 1)
{
stringBuilder.Append(string.Format(LI_FORMAT, paginationData.ItemClassName, paginationData.PageUrl.Replace(paginationData.PageFormat, (paginationData.PageIndex - 1).ToString()), paginationData.PagePrevText, paginationData.ItemStyle));
}
for (int currentIndex = beginIndex; currentIndex <= endIndex; currentIndex++)
{
string itemClassName = paginationData.ItemClassName + " ";
if(currentIndex == paginationData.PageIndex)
{
itemClassName = itemClassName + paginationData.ActiveItemClassName;
}
stringBuilder.Append(string.Format(LI_FORMAT, itemClassName, paginationData.PageUrl.Replace(paginationData.PageFormat, currentIndex.ToString()), string.Format(paginationData.PageText, currentIndex), paginationData.ItemStyle));
}
if (paginationData.IsFull && paginationData.PageIndex + 1 <= paginationData.PageCount)
{
stringBuilder.Append(string.Format(LI_FORMAT, paginationData.ItemClassName, paginationData.PageUrl.Replace(paginationData.PageFormat, (paginationData.PageIndex + 1).ToString()), paginationData.PageNextText, paginationData.ItemStyle));
}
if (paginationData.IsFull && paginationData.PageIndex < paginationData.PageCount)
{
stringBuilder.Append(string.Format(LI_FORMAT, paginationData.ItemClassName, paginationData.PageUrl.Replace(paginationData.PageFormat, paginationData.PageCount.ToString()), paginationData.PageLastText, paginationData.ItemStyle));
}
#endregion
return string.Format(UL_FORMAT, paginationData.ClassName, stringBuilder.ToString(), paginationData.Style);
}
#endregion
}
#region 逻辑处理辅助类
public class PaginationData
{
#region 属性默认值
private int _showPageCount = 5;
private string _pageUrl = "-1";
private string _pageFormat = "-1";
private string _pageFirstText = "First";
private string _pagePrevText = "Prev";
private string _pageText = "{0}";
private string _pageNextText = "Next";
private string _pageLastText = "Last";
private bool _isFull = true;
private bool _isShowRecords = false;
private string _activeItemClassName = "active";
#endregion
/// <summary>
/// 当前页索引
/// </summary>
public int PageIndex { get; set; }
/// <summary>
/// 格式化页索引，默认 -1
/// </summary>
public string PageFormat { get { return this._pageFormat; } set { this._pageFormat = value; } }
/// <summary>
/// 总页数
/// </summary>
public int PageCount { get; set; }
/// <summary>
/// 数据总数
/// </summary>
public int TotalCount { get; set; }
/// <summary>
/// 显示的页数数量，当设置偶数值时，会默认加 1
/// </summary>
public int ShowPageCount { get { return this._showPageCount; } set { this._showPageCount = value; } }
/// <summary>
/// 页面 URL 地址，其中页索引用 -1 代替，例：topiclist/-1 或 topiclist.html?pageIndex=-1
/// </summary>
public string PageUrl { get { return this._pageUrl; } set { this._pageUrl = value; } }
/// <summary>
/// 首页显示文本，默认值：First
/// </summary>
public string PageFirstText { get { return this._pageFirstText; } set { this._pageFirstText = value; } }
/// <summary>
/// 上一页显示文本，默认值：Prev
/// </summary>
public string PagePrevText { get { return this._pagePrevText; } set { this._pagePrevText = value; } }
/// <summary>
/// 页面显示文本，页索引用 {0} 代替，例：第 {0} 页
/// </summary>
public string PageText { get { return this._pageText; } set { this._pageText = value; } }
/// <summary>
/// 下一页显示文本，默认值：Next
/// </summary>
public string PageNextText { get { return this._pageNextText; } set { this._pageNextText = value; } }
/// <summary>
/// 尾页显示文本，默认值：Last
/// </summary>
public string PageLastText { get { return this._pageLastText; } set { this._pageLastText = value; } }
/// <summary>
/// 分页 class 信息，默认为空
/// </summary>
public string ClassName { get; set; }
/// <summary>
/// 分布 style 信息，默认为空
/// </summary>
public string Style { get; set; }
/// <summary>
/// 分页页索引 class 信息，默认为空
/// </summary>
public string ItemClassName { get; set; }
/// <summary>
/// 分页页索引 style 信息，默认为空
/// </summary>
public string ItemStyle { get; set; }
/// <summary>
/// 选中页索引 class 信息，默认为 active
/// </summary>
public string ActiveItemClassName { get { return this._activeItemClassName; } set { this._activeItemClassName = value; } }
/// <summary>
/// 是否显示首页/上一页/下一页/尾页
/// </summary>
public bool IsFull { get { return this._isFull; } set { this._isFull = value; } }
/// <summary>
/// 是否显示记录数
/// </summary>
public bool IsShowRecords { get { return this._isShowRecords; } set { this._isShowRecords = value; } }
/// <summary>
/// 记录 class 信息
/// </summary>
public string RecordsClassName { get; set; }
/// <summary>
/// 记录数据总数 class 信息
/// </summary>
public string RecordsTotalCountClassName { get; set; }
/// <summary>
/// 记录页总数 class 信息
/// </summary>
public string RecordsPageCountClassName { get; set; }
}
#endregion
}