C#自定义分页控件
C#自己写的一个自定义分页控件（源码下载，没有DEMO）
分页以前一直是用第三方分页控件AspNetPager.dll，使用起来也挺方便的，就是样式设置起来感觉不是很好，于是经理决定我们自己做一个分页控件，这个任务就交到我的手上。这个自定义分页控件是模仿58同城的分页及结合我们现在项目的需要写的。感觉比较实用，没什么亮点。
其实分页控件也没啥，就是生成相关的HTML代码，你需要啥HTML代码，用你的代码生成就是了，不管是AspNetPager.dll还是58同城也都是生成分页相关的HTML代码，其实就是一堆a标签，点分页的时候，分页控件所在的页面会刷新。
一：用AspNetPager.dll实现的分页
图：
生成的源码
<div id="ctl00_Content_AspNetPager1">
<a disabled="disabled" style="margin-right:5px;">首页</a>
<a disabled="disabled" style="margin-right:5px;">上一页</a>
<span class="al" style="margin-right:5px;">1</span>
<a href="NewsList.aspx?page=2" style="margin-right:5px;">2</a>
<a href="NewsList.aspx?page=3" style="margin-right:5px;">3</a>
<a href="NewsList.aspx?page=4" style="margin-right:5px;">4</a>
<a href="NewsList.aspx?page=5" style="margin-right:5px;">5</a>
<a href="NewsList.aspx?page=6" style="margin-right:5px;">6</a>
<a href="NewsList.aspx?page=7" style="margin-right:5px;">7</a>
<a href="NewsList.aspx?page=2" style="margin-right:5px;">下一页</a>
<a href="NewsList.aspx?page=7" style="margin-right:5px;">尾页</a>
</div>
二：58同城的分页
图：
生成的源码
<div class="pager">
<strong><span>1</span></strong><a href="/zufang/pn2/"><span>2</span></a>
<a href="/zufang/pn3/"><span>3</span></a>
<a href="/zufang/pn4/"><span>4</span></a>
<a href="/zufang/pn5/"><span>5</span></a>
<a href="/zufang/pn6/"><span>6</span></a>
<a href="/zufang/pn7/"><span>7</span></a>
<a href="/zufang/pn8/"><span>8</span></a>
<a href="/zufang/pn9/"><span>9</span></a>
<a href="/zufang/pn10/"><span>10</span></a>
<a href="/zufang/pn11/"><span>11</span></a>
<a href="/zufang/pn12/"><span>12</span></a>
<a class="next" href="/zufang/pn2/"><span>下一页</span></a>
</div>
三：我的分页控件
程序代码
<os:PagingControl runat="server" ID="paginglist" PageSize="4" CssCurrent="curpage" ImgFirst="/images/index/btn_first.jpg"
ImgPrev="/images/index/btn_prev.jpg" ImgNext="/images/index/btn_next.jpg" ImgLast="/images/index/btn_end.jpg" CssClass="pagelist">
</os:PagingControl>paginglist.RecordCount = 200;
paginglist.LoadControl();
生成源码
<div class='pagelist'>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=1'><img src=/images/index/btn_first.jpg/></a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=23'><img src=/images/index/btn_prev.jpg/></a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=14'>14</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=15'>15</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=16'>16</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=17'>17</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=18'>18</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=19'>19</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=20'>20</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=21'>21</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=22'>22</a>
<a href='/CommonQuestion/QuestionListContent.aspx?questionTypeID=0&page=23'>23</a>
<span class=curpage>24</span>
</div>
程序源码
using System.Text;
using System.Web;
using System.Web.UI;
using System.ComponentModel;
using System.Collections.Generic;
using System.Web.UI.WebControls;
//自定义分页控件
namespace ObjectCommon.Libary.Component
{
[ToolboxData("<{0}:PagingControl runat=\"server\"></{0}:PagingControl>"), DefaultProperty("")]
publicclass PagingControl : Literal
{
#region 分页属性
privateint pageSize =10;
publicint PageSize
{
set {
if (value >0)
{
pageSize = value;
}
}
get { return pageSize; }
}
privateint pageIndex =1;
publicint PageIndex
{
set
{
if (value >0)
{
pageIndex = value;
}
}
get { return pageIndex; }
}
publicint RecordCount
{
set;
get;
}
privateint PageCount =0;
//分页参数
privatestring paraName ="page";
publicstring ParaName
{
set
{
if (value !=null&& value.Trim() !="")
{
paraName = value.Trim();
}
}
get {
return paraName;
}
}
#endregion
#region Css
//分页控件的样式
publicstring CssClass
{
set;
get;
}
//上一页样式
publicstring CssPrev
{
set;
get;
}
//下一页样式
publicstring CssNext
{
set;
get;
}
//当前页样式
publicstring CssCurrent
{
set;
get;
}
//首页样式
publicstring CssFirst
{
set;
get;
}
//尾页样式
publicstring CssLast
{
set;
get;
}
//其它页样式
publicstring CssOther
{
set;
get;
}
#endregion
#region Img
//首页图片
publicstring ImgFirst
{
set;
get;
}
//上一页页图片
publicstring ImgPrev
{
set;
get;
}
//下一页页图片
publicstring ImgNext
{
set;
get;
}
//尾页
publicstring ImgLast
{
set;
get;
}
#endregion
// A标签的HRef
privatestring ATargetHref
{
set;
get;
}
//获取paraname之外的请求参数
privatevoid GetUrl()
{
HttpContext ctx = HttpContext.Current;
string hostName ="http://"+ ctx.Request.Url.Host +":"+ ctx.Request.Url.Port ;
string url = ctx.Request.Url.ToString().Substring(hostName.Length).Split('?')[0] +"?";
StringBuilder query =new StringBuilder(url);
foreach (string key in ctx.Request.QueryString)
{
if (key!=null&& key.ToLower() !=this.ParaName)
{
query.Append(string.Format("{0}={1}&", key, ctx.Request.QueryString[key]));
}
}
this.ATargetHref = query.ToString();
}
privatestring GetUrl(int pageIndex)
{
returnstring.Format("{0}{1}={2}", this.ATargetHref,this.paraName, pageIndex);
}
//初始化属性
privatevoid Initializtion()
{
GetUrl();
this.PageCount = (this.RecordCount -1) /this.PageSize +1;
if (!string.IsNullOrEmpty(HttpContext.Current.Request[this.ParaName]))
{
this.PageIndex =int.Parse(HttpContext.Current.Request[this.ParaName]);
}
}
//生成控件
privatevoid LoadControl(List<Tag> divPaging)
{
if (divPaging ==null|| divPaging.Count ==0)
{
this.Text =null;
return;
}
StringBuilder sb =new StringBuilder(256);
if (this.CssClass ==null||this.CssClass.Trim() =="")
{
sb.Append("<div>");
}
else
{
sb.Append(string.Format("<div class='{0}'>", this.CssClass));
}
for (int i =0; i < divPaging.Count;i++)
{
if (divPaging[i] ==null)
{
sb.Append(GetCurrentPage());
}
else
{
sb.Append(divPaging[i].ToString());
}
}
sb.Append("</div>");
this.Text = sb.ToString();
}
privatestring GetCurrentPage()
{
if (this.CssCurrent ==null||this.CssCurrent.Trim() =="")
{
returnstring.Format("<span>{0}</span>", this.PageIndex);
}
else {
returnstring.Format("<span class={0}>{1}</span>", this.CssCurrent, this.PageIndex);
}
}
///<summary>
/// 加载控件
///</summary>
publicvoid LoadControl()
{
if (this.RecordCount<=this.PageSize)
{
this.Text =null;
}
else
{
Initializtion();
LoadControl(AddATarget());
}
}
#region 创建标签
private Tag CreateATarget(string img,string css,int pageIndex,string content)
{
Tag a =new Tag();
a.HRef = GetUrl(pageIndex);
if (img ==null|| img.Trim() =="")
{
a.InnerHtml = content;
}
else {
a.InnerHtml =string.Format("<img src={0}/>",img);
}
if (css !=null&& css.Trim() !="")
{
a.CssClass = css;
}
return a;
}
#endregion
// 向集合中添加标签
private List<Tag> AddATarget()
{
List<Tag> divPaging =new List<Tag>();
if (this.PageIndex >1)//添加上一页
{
divPaging.Add(CreateATarget(this.ImgFirst, this.CssFirst, 1, "首页"));//添加首页
divPaging.Add(CreateATarget(this.ImgPrev, this.CssPrev, this.PageIndex -1, "上一页"));
}
int end =this.PageIndex +5;
if (end <11)
{
end =11;
}
if (end >this.PageCount)
{
end =this.PageCount;
}
int start = end -10>0? end -10 : 1;
for (int i = start; i <= end; i++)
{
if (i ==this.PageIndex)
{
divPaging.Add(null);
}
else
{
divPaging.Add(CreateATarget(null, this.CssOther, i, i.ToString()));
}
}
if (this.PageIndex <this.PageCount)
{
divPaging.Add(CreateATarget(this.ImgNext, this.CssNext, this.PageIndex +1, "下一页"));//添加下一页
divPaging.Add(CreateATarget(this.ImgLast, this.CssLast, this.PageCount, "尾页"));//添加尾页
}
return divPaging;
}
// 标签实体
privateclass Tag
{
//链接
publicstring HRef
{
set;
get;
}
//链接显示的内容
publicstring InnerHtml
{
set;
get;
}
//样式
publicstring CssClass
{
set;
get;
}
publicoverridestring ToString()
{
if (this.CssClass !=null&&this.CssClass.Trim() !="")
{
this.CssClass =string.Format(" class='{0}'", this.CssClass);
}
returnstring.Format("<a href='{0}'{1}>{2}</a>", this.HRef, this.CssClass, this.InnerHtml);
}
}
}
}
自定义控件注册：
在web.config中，节点<pages> <controls>中加入：
<add tagPrefix="os" namespace="ObjectCommon.Libary.Component" assembly="ObjectCommon.Libary"/>
