去年就发表过asp.net 分页-利用后台直接生成html分页 ,那种方法只是单纯的实现了分页，基本不能使用,那时就想写个自己的分页控件，无奈能力有限。最近有点时间了，就自己做出了这个分页控件。我承认，这个控件参考了别人的，但是其实里面的原理都相同，差异只是展现方式而已。
去年就在做一个自己的后台系统，刚开始用的asp.net，做了一部分就没有做了，因为缺少权限控制类别。后面转为用asp.net mvc4做，也只是做了一部分，觉得不太方便，也许是我不太会用。再用ajax+ashx做了一部分，虽然体验不错，但是我还是放弃了，比起纯正的asp.net还是麻烦多了。我要做的系统不是很大，觉得用asp.net很方便，权限控制，通用控件可以加快步伐。所以我决定先做出来再说，怎么简单怎么做。
展示效果
属性解释：
Css:定义div和链接等的样式
SelectCss：当前选择的链接样式
CssEnable：本来想做一个默认的样式，但是感觉需要不大，所以这个属性暂时无用
PageSize：每页显示的数据条数
PreNextVisable：上一页和下一页的显示，默认为显示
TotalVisable：显示总数，默认为不显示，图上显示错误：共{0}笔
运行效果：
实现过程
//****************************************************************************************
//作者：轻狂书生
//博客地址：http://www.cnblogs.com/xiaoshuai1992
//create: 2014/5/5
//功能：分页控件的实现
//使用方法：正常控件使用方法
//***************************************************************************************** using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.ComponentModel;
[assembly: TagPrefix("XS.Framework.Control", "xs")]
namespace pageControl
{
public class PageChangedEventArgs : EventArgs
{
int ITotalCount = ;
int ICurrentPage = ;
int IPageSize = ;
public int ECurrentPage
{
get { return ICurrentPage; }
set { ICurrentPage = value; }
}
public int ETotalCount
{
get { return ITotalCount; }
set { ITotalCount = value; }
}
public int EPageSize
{
get { return IPageSize; }
set { IPageSize = value; }
}
public PageChangedEventArgs(int curPage, int totalcount, int pageSize)
{
ECurrentPage = curPage;
ETotalCount = totalcount;
EPageSize = pageSize;
}
}
public delegate void PageChangedEvent(object sender, PageChangedEventArgs e);
public class xsPageControl : Control, IPostBackEventHandler
{
#region 属性
string _preText = "上一页";
string _nextText = "下一页";
string _totalText = "共{0}笔";
bool _totalVisable = false;//由于存在尾页号，总页数不是必须，故这里我设置默认为不打开
bool _preNextVisable = true;
int _pageSize = ;
string _css = "xsPage";
string _selectCss = "xsSelect";
bool _cssEnable = true;
int ITotalCount = ;
int ICurrentPage = ; [Category("Text")]
public string PreText
{
get { return _preText; }
set { _preText = value; }
}
[Category("Text")]
public string NextText
{
get { return _nextText; }
set { _nextText = value; }
}
[Category("Text")]
public string TotalText
{
get { return _totalText; }
set { _totalText = value; }
}
[Category("Text")]
public bool TotalVisable
{
get { return _totalVisable; }
set { _totalVisable = value; }
}
[Category("Text")]
public bool PreNextVisable
{
get { return _preNextVisable; }
set { _preNextVisable = value; }
} [Category("Size")]
public int PageSize
{
get { return _pageSize; }
set { _pageSize = value; }
}
[Category("CSS")]
public string Css
{
get { return _css; }
set { _css = value; }
}
[Category("CSS")]
public string SelectCss
{
get { return _selectCss; }
set { _selectCss = value; }
}
[Category("CSS")]
/// <summary>
/// 是否使用默认CSS,自定义CSS无效
/// </summary>
public bool CssEnable
{
get { return _cssEnable; }
set { _cssEnable = value; }
}
[Browsable(false)]
public int CurrentPage
{
set { ICurrentPage = value; }
}
[Browsable(false)]
public int TotalPage
{
get
{
int tpage = ;
if (PageSize > )
{
tpage = (TotalCount % PageSize == ? TotalCount / PageSize : TotalCount / PageSize + );
}
return tpage; }
}
[Browsable(false)]
public int TotalCount
{
get { return ITotalCount; }
set { ITotalCount = value; }
}
#endregion public event PageChangedEvent PageChanged; #region 效果呈现
public override void RenderControl(HtmlTextWriter writer)
{
Render(writer);
} protected override void Render(HtmlTextWriter writer)
{
if (DesignMode)
{
writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
writer.AddAttribute(HtmlTextWriterAttribute.Class, Css);
writer.RenderBeginTag(HtmlTextWriterTag.Div); if (TotalVisable)
{
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write(string.Format(TotalText, ));
writer.RenderEndTag();
writer.Write(" ");
}
if (PreNextVisable)
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, "#");
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(PreText);
writer.RenderEndTag();
writer.Write(" ");
}
for (int i = ; i <= ; i++)
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, "#");
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(i.ToString());
writer.RenderEndTag();
writer.Write(" ");
}
if (PreNextVisable)
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, "#");
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(NextText);
writer.RenderEndTag();
writer.Write(" ");
}
writer.RenderEndTag();
}
else
{
writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
writer.AddAttribute(HtmlTextWriterAttribute.Class, Css);
writer.RenderBeginTag(HtmlTextWriterTag.Div); if (TotalVisable)
{
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write(string.Format(TotalText, ITotalCount));
writer.RenderEndTag();
}
if (PreNextVisable && ICurrentPage != )
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, ICurrentPage - + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(PreText);
writer.RenderEndTag();
}
if (TotalPage <= )
{
for (int i = ; i <= TotalPage; i++)
{
if (i == ICurrentPage)
{
//添加当前选择的样式
writer.AddAttribute(HtmlTextWriterAttribute.Class, SelectCss);
}
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, i + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(i.ToString());
writer.RenderEndTag();
}
}
else
{
if (ICurrentPage - > && ICurrentPage + < TotalPage)//前后都有的
{
//添加第一页
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write("");
writer.RenderEndTag(); writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write("…");
writer.RenderEndTag(); for (int i = ICurrentPage - ; i <= ICurrentPage + ; i++)
{
if (i == ICurrentPage)
{
//添加当前选择的样式
writer.AddAttribute(HtmlTextWriterAttribute.Class, SelectCss);
}
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, i + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(i.ToString());
writer.RenderEndTag();
}
//添加最后一页
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write("…");
writer.RenderEndTag();
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, TotalPage + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(TotalPage.ToString());
writer.RenderEndTag();
}
else if (ICurrentPage - <= )//前面不够，后面有多余
{
for (int i = ; i <= ; i++)
{
if (i == ICurrentPage)
{
//添加当前选择的样式
writer.AddAttribute(HtmlTextWriterAttribute.Class, SelectCss);
}
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, i + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(i.ToString());
writer.RenderEndTag();
}
//添加最后一页
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write("…");
writer.RenderEndTag();
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, TotalPage + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(TotalPage.ToString());
writer.RenderEndTag(); }
else if (ICurrentPage + >= TotalPage)//前面多余，后面不足
{
//添加第一页
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write("");
writer.RenderEndTag();
writer.RenderBeginTag(HtmlTextWriterTag.Span);
writer.Write("…");
writer.RenderEndTag();
for (int i = TotalPage - ; i <= TotalPage; i++)
{
if (i == ICurrentPage)
{
//添加当前选择的样式
writer.AddAttribute(HtmlTextWriterAttribute.Class, SelectCss);
}
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, i + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(i.ToString());
writer.RenderEndTag();
}
} }
if (PreNextVisable && ICurrentPage != TotalPage && TotalPage > )
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:" + Page.ClientScript.GetPostBackEventReference(this, ICurrentPage + + ""));
writer.RenderBeginTag(HtmlTextWriterTag.A);
writer.Write(NextText);
writer.RenderEndTag();
}
writer.RenderEndTag();
}
} #endregion /// <summary>
/// 设置翻页
/// </summary>
/// <param name="gotoPage"></param>
protected virtual void OnPageChanged(int gotoPage)
{
PageChangedEventArgs e = new PageChangedEventArgs(gotoPage, TotalCount, PageSize);
if (this.PageChanged != null)
{
PageChanged(this, e);
CurrentPage = e.ECurrentPage;
TotalCount = e.ETotalCount;
PageSize = e.EPageSize;
}
}
public void RaisePostBackEvent(string eventArgument)
{
int gotopage = Convert.ToInt32(eventArgument);
OnPageChanged(gotopage);
} /// <summary>
/// 第一次进入页面需要显示调用
/// </summary>
public void StartShowPage()
{
OnPageChanged();
}
/// <summary>
/// 删除或更新后可以直接刷新
/// </summary>
public void RefreshPage()
{
OnPageChanged(ICurrentPage);
}
}
}
重要代码解释，其他可以看注释
1：控件继承自Control, IPostBackEventHandler
链接调用的为Page.ClientScript.GetPostBackEventReference（）方法,点击时进入RaisePostBackEvent 方法
RaisePostBackEvent 方法实现接口IPostBackEventHandler，在进入页面时进入调用OnPageChanged（）方法实现分页
2：PageChangedEventArgs 类
定义为PageChanged的参数，可以把当前的页数，总数，每页显示数带到页面进行查询，也可以在页面设置这些属性,实现控件的显示
页面使用
拖入控件，设置好属性,把要实现的数据查询和绑定写在pagechanged里面，参数里面包含了分页的参数（当前页数,每页显示数）
protected void xsPageControl1_PageChanged(object sender, PageChangedEventArgs e)
{
}
进入页面地方使用
xsPageControl1.StartShowPage();
页面数据修改或删除后刷新当页
xsPageControl1.RefreshPage();
源码下载
以后还会对其进行修改和完善,也可以写一下类别配合其使用,这个控件没有与其他控件关联，也没用和数据库关联，可以自行对任意需要分页显示的控件进行分页。
20140508修改
几天的测试发现了里面的bug
当前页面的刷新会找不到当前的页数，是因为页面刷新后控件类重新生成，当前页面的值也就回到了原点。
所以我考虑把CurrentPage 这个属性变为用页面缓存进行保存，经测试成功
public int CurrentPage
{
get { return Convert.ToInt32(ViewState[UniqueID + "xsCurrentPage"] == null ? : ViewState[UniqueID + "xsCurrentPage"]); }
set { ViewState[UniqueID + "xsCurrentPage"] = value; }
}
20140509修改
昨天发现了一个bug，如果数据有6条，每页显示5条。我这时选到第二页，删除第6条，调用RefreshPage（）是当前页面记录的2，可是由于删除其实没有第二页了。
解决办法是在OnPageChanged 发生后判断总页数和当前页，如果当前页大于总页数，执行OnPageChanged(总页数)。这样可以解决，可是得查询2遍了