C#_Ajax_分页
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web; namespace MvcTest.Extends
{
/// <summary>
/// 分页元素位置
/// </summary>
public enum PagerElementPosition
{
Left,
Right
}
public class PagerConfig
{
/// <summary>
/// 记录总条数
/// </summary>
public int TotalRecord { get; set; }
/// <summary>
/// 记录的单位，默认为“条”
/// </summary>
public string RecordUnit { get; set; }
/// <summary>
/// 记录的名称，默认为“记录”
/// </summary>
public string RecordName { get; set; }
/// <summary>
/// 当前页码的参数名
/// </summary>
public string CurrentPageKey { get; set; }
/// <summary>
/// 当前页码 只读
/// </summary>
public int CurrentPage
{
get
{
if (HttpContext.Current.Request.Params[CurrentPageKey] == null)
{
return 1;
}
else
{
try
{
int currentPage = Convert.ToInt32(HttpContext.Current.Request.Params[CurrentPageKey]);
if (currentPage < 1)
{
return 1;
}
else if (currentPage > TotalPage)
{
return TotalPage;
}
else
{
return currentPage;
}
}
catch
{
return 1;
}
}
}
}
private int _PageSize;
/// <summary>
/// 每页显示记录数
/// </summary>
public int PageSize
{
get
{
return _PageSize;
}
set
{
if (value < 1)
{
_PageSize = 1;
}
else
{
_PageSize = value;
}
}
}
/// <summary>
/// 总页数 只读
/// </summary>
public int TotalPage
{
get
{
return (int)Math.Ceiling(TotalRecord / (double)PageSize);
}
}
/// <summary>
/// 是否显示首页、尾页链接
/// </summary>
public bool ShowFirstLastPageLink { get; set; }
/// <summary>
/// 是否显示上一页、下一页链接
/// </summary>
public bool ShowPrevNextPageLink { get; set; }
/// <summary>
/// 是否显示数字按钮
/// </summary>
public bool ShowDigitalLink { get; set; }
/// <summary>
/// 数字按钮数量
/// </summary>
public int DigitalLinkCount { get; set; }
/// <summary>
/// 是否显示总记录数
/// </summary>
public bool ShowTotalRecord { get; set; }
/// <summary>
/// 总记录数出现位置
/// </summary>
public PagerElementPosition TotalRecordPosition { get; set; }
/// <summary>
/// 是否显示当前页数和总页数信息
/// </summary>
public bool ShowPageInfo { get; set; }
/// <summary>
/// 当前页和总页数信息显示位置
/// </summary>
public PagerElementPosition PageInfoPosition { get; set; }
/// <summary>
/// 是否显示GoTo输入区域
/// </summary>
public bool ShowGoTo { get; set; }
/// <summary>
/// 指定生成的元素对应的class的前缀字符
/// </summary>
public string CssClassPreWord { get; set; }
/// <summary>
/// 是否创建为ajax分页控件
/// </summary>
public bool UseAjax { get; set; }
/// <summary>
/// Ajax提交后更新的html元素id
/// </summary>
public string AjaxUpdateTargetID { get; set; }
/// <summary>
/// Ajax提交后调用的js function名称
/// </summary>
public string AjaxSuccessFunctionName { get; set; }
/// <summary>
/// 是否自动生成Ajax提交后调用的js function
/// </summary>
public bool AutoGenarateAjaxSuccessFunction { get; set; }
/// <summary>
/// 使用默认值初始化设置
/// </summary>
public PagerConfig()
{
PageSize = 4;
RecordUnit = "条";
RecordName = "记录";
CurrentPageKey = "page";
CssClassPreWord = "pager";
ShowFirstLastPageLink = true;
ShowPrevNextPageLink = true;
ShowDigitalLink = true;
DigitalLinkCount = 10;
ShowTotalRecord = false;
TotalRecordPosition = PagerElementPosition.Left;
ShowPageInfo = false;
PageInfoPosition = PagerElementPosition.Left;
ShowGoTo = false;
UseAjax = false;
AjaxUpdateTargetID = "";
AjaxSuccessFunctionName = "OnPageChanged";
AutoGenarateAjaxSuccessFunction = true;
}
}
/// <summary>
/// 配合Pager扩展实现分页的帮助类
/// </summary>
public class PagerHelper
{
/// <summary>
/// 获取记录开始和结束编号，并返回实际的页码
/// </summary>
/// <param name="allCount">记录总条数</param>
/// <param name="pageSize">页大小</param>
/// <param name="pageIndex">（输出）当前页码</param>
/// <param name="startIndex">（输出）开始编号</param>
/// <param name="endIndex">（输出）结束编号</param>
/// <param name="currentPageKey">分页参数名称</param>
/// <param name="pageIndexIs0Based">页码编号是否从0开始，默认为否</param>
/// <param name="recordIndexIs0Based">记录编号是否从0开始，默认为否</param>
public static void GetStartAndEndIndex(int allCount, int pageSize, out int pageIndex, out int startIndex, out int endIndex, string currentPageKey = "page", bool pageIndexIs0Based = false, bool recordIndexIs0Based = false)
{
//计算pageIndex的实际值
pageIndex = GetRealPageIndex(allCount, pageSize, currentPageKey, pageIndexIs0Based); //计算过程是0based的
if (!pageIndexIs0Based)
{
pageIndex--; //转成0based
}
//计算startIndex和endIndex
startIndex = pageIndex * pageSize;
endIndex = startIndex + pageSize - 1;
if (endIndex > allCount - 1)
{
endIndex = allCount - 1;
} //0based计算完成，下面根据设置不同，输出不同
if (!pageIndexIs0Based)
{
pageIndex++;
}
if (!recordIndexIs0Based)
{
startIndex++;
endIndex++;
}
} /// <summary>
/// 返回实际页码
/// </summary>
/// <param name="allCount">总记录数</param>
/// <param name="pageSize">页面大小</param>
/// <param name="currentPageKey">分页参数名称</param>
/// <param name="pageIndexIs0Based">页码编号是否从0开始，默认为否</param>
/// <returns>实际页码</returns>
public static int GetRealPageIndex(int allCount, int pageSize, string currentPageKey = "page", bool pageIndexIs0Based = false)
{
int pageIndex;
//整个计算过程都是0based的
if (pageSize < 1)
{
pageSize = 1; //容错
}
if (HttpContext.Current.Request.Params[currentPageKey] == null)
{
pageIndex = 0;
}
else
{
try
{
int _pageIndex = Convert.ToInt32(HttpContext.Current.Request.Params[currentPageKey]); //待判断的页码
if (!pageIndexIs0Based)
{
_pageIndex--; //转成0based
}
if (_pageIndex < 0)
{
pageIndex = 0;
}
else
{
int totalPage = (int)Math.Ceiling(allCount / (double)pageSize);
if (_pageIndex >= totalPage)
{
pageIndex = totalPage - 1;
}
else
{
pageIndex = _pageIndex;
}
}
}
catch
{
pageIndex = 0;
}
}
//0based计算完成，下面根据设置不同，输出不同
return (pageIndexIs0Based) ? pageIndex : pageIndex + 1;
} }
}
using MvcTest.Extends;
using System;
using System.Collections.Generic;
using System.Linq; using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing; namespace MvcTest.HTML
{
public static class PagerExtensions
{
//提取 返回a标签 方法
private static string getLinkHtml(UrlHelper urlHelper, bool useAjax, string ajaxSuccessFunction, string linkContent, string actionName, string controllerName, RouteValueDictionary routeValues)
{
string link = "";
if (useAjax)
{
link += "<a href=\"javascript:$.post('" + urlHelper.Action(actionName, controllerName) + "',{";
//将route放到post表单中
foreach (var route in routeValues.Keys)
{
link += route + ":'" + routeValues[route].ToString() + "',";
}
if (routeValues.Count > 0)
{
link = link.Remove(link.Length - 1);
}
link += "}," + ajaxSuccessFunction + ")\" >";
}
else
{
link += "<a href=\"" + urlHelper.Action(actionName, controllerName, routeValues) + "\">";
}
link += linkContent;
link += "</a>";
return link;
} #region 分页扩展 /// <summary>
/// 返回用于分页的div元素
/// </summary>
/// <param name="htmlHelper">HtmlHelper</param>
/// <param name="pagerConfig">分页设置对象</param>
/// <returns></returns>
public static MvcHtmlString Pager(this HtmlHelper htmlHelper, PagerConfig pagerConfig)
{
return Pager(htmlHelper, "", "", new { }, new { }, pagerConfig);
} /// <summary>
/// 返回用于分页的div元素
/// </summary>
/// <param name="htmlHelper">HtmlHelper</param>
/// <param name="htmlAttributes">html属性对象</param>
/// <param name="pagerConfig">分页设置对象</param>
/// <returns></returns>
public static MvcHtmlString Pager(this HtmlHelper htmlHelper, object htmlAttributes, PagerConfig pagerConfig)
{
return Pager(htmlHelper, "", "", new { }, htmlAttributes, pagerConfig);
}
/// <summary>
/// 返回用于分页的div元素
/// </summary>
/// <param name="htmlHelper">HtmlHelper</param>
/// <param name="actionName">方法</param>
/// <param name="htmlAttributes">html属性对象</param>
/// <param name="pagerConfig">分页设置对象</param>
/// <returns></returns>
public static MvcHtmlString Pager(this HtmlHelper htmlHelper, string actionName, object htmlAttributes, PagerConfig pagerConfig)
{
return Pager(htmlHelper, actionName, "", new { }, htmlAttributes, pagerConfig);
}
/// <summary>
/// 返回用于分页的div元素
/// </summary>
/// <param name="htmlHelper">HtmlHelper</param>
/// <param name="actionName">方法</param>
/// <param name="controllerName">控制器</param>
/// <param name="htmlAttributes">html属性对象</param>
/// <param name="pagerConfig">分页设置对象</param>
/// <returns></returns>
public static MvcHtmlString Pager(this HtmlHelper htmlHelper, string actionName, string controllerName, object htmlAttributes, PagerConfig pagerConfig)
{
return Pager(htmlHelper, actionName, controllerName, new { }, htmlAttributes, pagerConfig);
}
/// <summary>
/// 返回用于分页的div元素
/// </summary>
/// <param name="htmlHelper">HtmlHelper</param>
/// <param name="actionName">方法</param>
/// <param name="controllerName">控制器</param>
/// <param name="routeValues">路由参数</param>
/// <param name="htmlAttributes">html属性对象</param>
/// <param name="pagerConfig">分页设置对象</param>
/// <returns></returns>
public static MvcHtmlString Pager(this HtmlHelper htmlHelper, string actionName, string controllerName, object routeValues, object htmlAttributes, PagerConfig pagerConfig)
{ RouteValueDictionary RouteValues;
if (routeValues == null)
{
RouteValues = new RouteValueDictionary();
}
else
{
RouteValues = new RouteValueDictionary(routeValues);
} UrlHelper Url = new UrlHelper(htmlHelper.ViewContext.RequestContext);
AjaxHelper Ajax = new AjaxHelper(htmlHelper.ViewContext, htmlHelper.ViewDataContainer); StringBuilder sbPager = new StringBuilder();
sbPager.Append("<div");
//利用反射获取htmlAttributes的全部元素和值
if (htmlAttributes != null)
{
System.Reflection.PropertyInfo[] htmlProperties = (System.Reflection.PropertyInfo[])htmlAttributes.GetType().GetProperties();
foreach (var property in htmlProperties)
{
sbPager.Append(" " + property.Name + "=\"" + property.GetValue(htmlAttributes).ToString() + "\"");
}
}
sbPager.Append(">");
//左侧记录总数信息
if (pagerConfig.ShowTotalRecord && pagerConfig.PageInfoPosition == PagerElementPosition.Left)
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-count\">共" + pagerConfig.TotalRecord + pagerConfig.RecordUnit + pagerConfig.RecordName + "</span>");
}
//左侧页码信息
if (pagerConfig.ShowPageInfo && pagerConfig.PageInfoPosition == PagerElementPosition.Left)
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-info\">第" + pagerConfig.CurrentPage + "页/共" + pagerConfig.TotalPage + "页</span>");
}
//首页
if (pagerConfig.ShowFirstLastPageLink)
{
if (pagerConfig.CurrentPage > 1)
{
RouteValues[pagerConfig.CurrentPageKey] = 1;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, "首页", actionName, controllerName, RouteValues) + "</span>");
}
else
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">首页</span>");
}
}
//上一页
if (pagerConfig.ShowPrevNextPageLink)
{
if (pagerConfig.CurrentPage > 1)
{
RouteValues[pagerConfig.CurrentPageKey] = pagerConfig.CurrentPage - 1;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, "上一页", actionName, controllerName, RouteValues) + "</span>");
}
else
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">上一页</span>");
}
}
//数字导航开始
if (pagerConfig.ShowDigitalLink)
{ int shownStartPageIndex, shownEndPageIndex;
//总页数少于要显示的页数，页码全部显示
if (pagerConfig.DigitalLinkCount >= pagerConfig.TotalPage)
{
shownStartPageIndex = 1;
shownEndPageIndex = pagerConfig.TotalPage;
}
else//显示指定数量的页码
{
int forward = (int)Math.Ceiling(pagerConfig.DigitalLinkCount / 2.0);
if (pagerConfig.CurrentPage > forward)//起始页码大于1
{
shownEndPageIndex = pagerConfig.CurrentPage + pagerConfig.DigitalLinkCount - forward;
if (shownEndPageIndex > pagerConfig.TotalPage)//结束页码大于总页码结束页码为最后一页
{
shownStartPageIndex = pagerConfig.TotalPage - pagerConfig.DigitalLinkCount + 1;
shownEndPageIndex = pagerConfig.TotalPage; }
else
{
shownStartPageIndex = pagerConfig.CurrentPage - forward + 1;
}
}
else//起始页码从1开始
{
shownStartPageIndex = 1;
shownEndPageIndex = pagerConfig.DigitalLinkCount;
}
}
//向上…
if (shownStartPageIndex > 1)
{
RouteValues[pagerConfig.CurrentPageKey] = shownStartPageIndex - 1;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-number\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, "...", actionName, controllerName, RouteValues) + "</span>");
}
//数字
for (int i = shownStartPageIndex; i <= shownEndPageIndex; i++)
{
if (i != pagerConfig.CurrentPage)
{
RouteValues[pagerConfig.CurrentPageKey] = i;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-number\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, i.ToString(), actionName, controllerName, RouteValues) + "</span>");
}
else
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-number " + pagerConfig.CssClassPreWord + "-currentnum\">" + i.ToString() + "</span>");
}
}
//向下…
if (shownEndPageIndex < pagerConfig.TotalPage)
{
RouteValues[pagerConfig.CurrentPageKey] = shownEndPageIndex + 1;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-number\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, "...", actionName, controllerName, RouteValues) + "</span>");
}
}
////数字导航结束 //下一页
if (pagerConfig.ShowPrevNextPageLink)
{
if (pagerConfig.CurrentPage < pagerConfig.TotalPage)
{
RouteValues[pagerConfig.CurrentPageKey] = pagerConfig.CurrentPage + 1;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, "下一页", actionName, controllerName, RouteValues) + "</span>");
}
else
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">下一页</span>");
}
}
//尾页
if (pagerConfig.ShowFirstLastPageLink)
{
if (pagerConfig.CurrentPage < pagerConfig.TotalPage)
{ RouteValues[pagerConfig.CurrentPageKey] = pagerConfig.TotalPage;
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">" + getLinkHtml(Url, pagerConfig.UseAjax, pagerConfig.AjaxSuccessFunctionName, "尾页", actionName, controllerName, RouteValues) + "</span>");
}
else
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-btn\">尾页</span>"); }
} //右侧记录总数信息
if (pagerConfig.ShowTotalRecord && pagerConfig.PageInfoPosition == PagerElementPosition.Right)
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-count\">共" + pagerConfig.TotalRecord + pagerConfig.RecordUnit + pagerConfig.RecordName + "</span>");
}
//右侧页码信息
if (pagerConfig.ShowPageInfo && pagerConfig.PageInfoPosition == PagerElementPosition.Right)
{
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-info\">第" + pagerConfig.CurrentPage + "页/共" + pagerConfig.TotalPage + "页</span>");
} //页码输入框
if (pagerConfig.ShowGoTo)
{ RouteValues[pagerConfig.CurrentPageKey] = "--pageRouteValue--";
sbPager.Append("<span class=\"" + pagerConfig.CssClassPreWord + "-goto\">转到第<input class=\"" + pagerConfig.CssClassPreWord + "-goto-input\" type=\"text\" url=\"" + Url.Action(actionName, controllerName, RouteValues) + "\" />页"); if (pagerConfig.UseAjax)
{
sbPager.Append("<input class=\"" + pagerConfig.CssClassPreWord + "-goto-submit\" type=\"button\" value=\"GO\" onclick=\"$.post( $(this).prev().attr('url').replace('--pageRouteValue--',$(this).prev().val())," + pagerConfig.AjaxSuccessFunctionName + ")\" /></span>");
}
else
{
sbPager.Append("<input class=\"" + pagerConfig.CssClassPreWord + "-goto-submit\" type=\"button\" value=\"GO\" onclick=\"window.location = $(this).prev().attr('url').replace('--pageRouteValue--',$(this).prev().val());\" /></span>");
}
}
//ajax分页回调函数
if (pagerConfig.UseAjax)
{
if (pagerConfig.AutoGenarateAjaxSuccessFunction)
{
sbPager.Append("<script type=\"text/javascript\">function " + pagerConfig.AjaxSuccessFunctionName + "(data){$('#" + pagerConfig.AjaxUpdateTargetID + "').html(data);}</script>");
}
}
sbPager.Append("</div>");
return MvcHtmlString.Create(sbPager.ToString());
} #endregion }
}
调用
public ActionResult Index()
{
int pageSize = 4;
int allCount = db.Movies.Count();
ViewBag.Num = allCount;
ViewBag.PageSize = pageSize;
int pageIndex, startIndex, endIndex;
//获取开始和结束的记录序号
PagerHelper.GetStartAndEndIndex(allCount, pageSize, out pageIndex, out startIndex, out endIndex);
//调用存储过程返回指定序号范围的数据
// return View(db.SelectUserList(startIndex, endIndex)); var sear = (from m in db.Movies where m.ID >= startIndex && m.ID <= endIndex select m).ToList();
return View(sear);
//return View(db.Movies.ToList());
}
@Html.Pager("Index", "Movies", new { }, new PagerConfig { TotalRecord = ViewBag.Num, PageSize = ViewBag.PageSize })
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