public class page : System.Web.UI.WebControls.WebControl
{
public page()
{
//
// TODO: 在此处添加构造函数逻辑
//
// 已经解决中文参数问题。
}
private int _count;//每页显示的记录条数
private int _CurrentPage;//当前页
private int _allCount;//所有记录条数
private int _showPages;//显示页数
//以下脚本用于从文本框输入页码
private const string SCRIPTSTRING = " \n";
[DefaultValue(10),Category("Customer")]
public int Count
{
set
{
if(value <= 0)
_count = 1;
else
_count = value;
}
get
{
return _count;
}
}
[DefaultValue(1),Category("Customer")]
public int CurrentPage
{
set
{
if(value < 0)
_CurrentPage = 1;
else
_CurrentPage = value;
}
get
{
return _CurrentPage;
}
}
[DefaultValue(1),Category("Customer")]
public int AllCount
{
get
{
return _allCount;
}
set
{
if(_allCount < 0)
throw new Exception("记录总条数不能为负数");
else
_allCount = value;
}
}
[DefaultValue(1),Category("Customer")]
public int Pages//总页数
{
get
{
if(this._allCount % this._count > 0)
return ((int)this._allCount / this._count) + 1;
else
return ((int)this._allCount / this._count);
}
}
[DefaultValue(1),Category("Customer")]
public int ShowPages
{
set
{
if(value > 0)
_showPages = value;
else
_showPages = 9;
}
get
{
return _showPages;
}
}
protected override void Render(HtmlTextWriter writer)
{
base.Render (writer);
string leftInfo;
StringBuilder centerInfo = new StringBuilder();
//分页条分三部分，leftInfo是最左边的部分，用来显示当前页/总页数，每页显示的记录条数
leftInfo = "页" + this.CurrentPage.ToString() + "/" +
this.Pages.ToString() + " " + "每页" + this.Count.ToString() + "条" + " 共" +
this.AllCount.ToString() + "条";
//中间的部分是分页部分
int min;//要显示的页面数最小值
int max;//要显示的页面数最大值
if(this.CurrentPage > this.Pages)//当前页必须小于最大页
{
this.CurrentPage = this.Pages;
}
if(this.CurrentPage % this.ShowPages == 0) //如果恰好整除
{
if(this.AllCount == 0)
{
min = this.CurrentPage;
max = this.CurrentPage+this.ShowPages;
}
else if(this.AllCount <= (this.CurrentPage*this.Count))
{
min = this.CurrentPage-this.ShowPages + 1;
max = this.CurrentPage;
}
else
{
min = this.CurrentPage-2;
max = this.CurrentPage + this.ShowPages-2;
}
}
else if(this.CurrentPage % this.ShowPages == 1 && this.CurrentPage >
this.ShowPages )
{
if(this.AllCount <= (this.CurrentPage*this.Count))
{
min = (((int)this.CurrentPage / this.ShowPages ) - 1) *
this.ShowPages +2;
max = this.CurrentPage;
}
else
{
min = this.CurrentPage;
max = this.CurrentPage+this.ShowPages;
}
}
else
{
min = ((int)this.CurrentPage / this.ShowPages) * this.ShowPages +
1;
max = (((int)this.CurrentPage / this.ShowPages) +1) *
this.ShowPages;
}
string numberStr = " ";//循环生成数字序列部分
string AbsUrl = String.Empty;//URL?左边的部分
//处理中间含有中文出错的问题 怎么样处理格空?
string temps;
int tempi;
if(this.Context.Request.Url.ToString().IndexOf("?")>0)
{
temps=this.Context.Request.Url.ToString().Replace(" ","20%");
temps=temps.Substring(0,temps.IndexOf(""));
for(tempi=0;tempi<this.Context.Request.QueryString.Count;tempi++)
{
if(tempi==0)
temps=temps+"?"+this.Context.Request.QueryString.Keys[tempi].ToString()+"="+this.Context.Request.QueryString.Get(tempi).ToString();
else
temps=temps+"&"+this.Context.Request.QueryString.Keys[tempi].ToString()+"="+this.Context.Request.QueryString.Get(tempi).ToString();
}
AbsUrl=temps;
}
else
AbsUrl = (this.Context.Request.Url.ToString());
//处理参数出现中文错误结束
if(AbsUrl.IndexOf("?") == -1)
{
AbsUrl+="?";
}
else
{
string s=AbsUrl.Substring(AbsUrl.IndexOf("?"));
s=s.ToLower();
if(s.IndexOf("currentpage")==-1) //不存在currentpage变量
{
AbsUrl+="&";
}
else //多个参数时,currentpage必须放在最右边才能正确
{
AbsUrl=AbsUrl.Substring(0,AbsUrl.IndexOf("?"))+s.Substring(0,s.IndexOf("currentpage"));
}
}
for(int i = min ; i <= max ; i++)
{
if(i <= this.Pages)//只有不大于最大页才显示
{
if(this.CurrentPage == i)//如果是当前页，用斜体和红色显示
{
numberStr = numberStr + "<I style='color:red'>" + i.ToString() + "</I>" +"</a>" + "\n";
}
else
{
numberStr = numberStr + "<a href=" + AbsUrl + "CurrentPage=" + i.ToString() + ">" + i.ToString() +"</a>" + "\n";
}
}
}
//第一页，上一页，下一页,最后一页
string First,Previous,Next,Last;
if(CurrentPage<=1)
First = "";
else
First = "<a href="+AbsUrl + "CurrentPage=1"+">";
/////////
if(CurrentPage <= 1)
Previous="";
else
Previous = "<a href="+AbsUrl + "CurrentPage=" + (CurrentPage- 1).ToString()+">";
/////////
if(CurrentPage == this.Pages)
Next="";
else
Next = "<a href="+AbsUrl + "CurrentPage=" + (CurrentPage + 1).ToString()+">";
/////////
if(CurrentPage==this.Pages)
Last="";
else
Last = "<a href="+AbsUrl + "CurrentPage=" + this.Pages+">";
/////////
centerInfo.AppendFormat("<font face='Webdings' style='font-size:14px'>{0}9</a>{1}7</a></font>{2}<font face='Webdings' style='font-size:14px'>{3}8</a>{4}:</a></font>",First,Previous,numberStr,Next,Last);
StringBuilder sb = new StringBuilder();//HTML字符串
sb.AppendFormat("<table style = 'font-size:12px' border='0' cellpadding='0' cellspacing='0' width='100%'> \n " +
"<tr>\n" +
"<td width='30%' align='left'>{0}</td>\n" +
"<td width='50%' align='right'>{1}</td>\n" +
"<td width='20%' align='right'><input type='text' name='T1' size='4' style='border-bottom:solid 1pt gray;border-top :solid 1pt gray; border-left:solid 1pt gray;border-right:solid 1pt gray;'> \n <input type='button' name='B1' size='6' value=go style='border-bottom:solid 1pt gray;border-top :solid 1pt gray; border-left:solid 1pt gray;border-right:solid 1pt gray;' onclick='go(T1,{2})'></td>\n" +
"</tr>\n" +
"</table>",leftInfo,
centerInfo.ToString(),
this.Pages);
writer.Write(sb.ToString());
}
protected override void OnPreRender(EventArgs e)
{
//注册控件
base.OnPreRender (e);
if(!Page.IsClientScriptBlockRegistered("WEREW-332DFAF-FDAFDSFDSAFD"))
{
Page.RegisterClientScriptBlock("WEREW-332DFAF-FDAFDSFDSAFD",SCRIPTSTRING);
}
}
}
===============================================================================
以下的JS代码,和分页控件放在同一个页面上
<script language="javascript">
function go(ctrl,max)
{
if(ctrl.value >= 1 && ctrl.value<= max)
{
var url;
var index;
var s;
url = location.href;
index = url.indexOf('?');
if(index == -1)
{
url=url+"?";
}
else
{
s=url.substring(url.indexOf("?"));
s=s.toLowerCase();
if(s.indexOf("currentpage")==-1) //不存在currentpage变量
{
url=url+"&";
}
else //多个参数时,currentpage必须放在最右边才能正确
{
url=url.substring(0,url.indexOf("?"))+s.substring(0,s.indexOf("currentpage"));
}
}
location.href = url + "currentPage=" + ctrl.value; }
else
{
alert("您输入的页码必须是符合页面要求的数字,最大值是：" + max);
return false;
}
}
</script>
