using System;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Permissions;
using System.Collections.Specialized;
using Etmc.App.ETicket.Utility;
namespace Etmc.App.ETicket.WebControl
{
/// <summary>
/// 分页栏
/// </summary>
[
AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal),
AspNetHostingPermission(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal),
ToolboxData("<{0}:PaginationBar runat=server></{0}:PaginationBar>")
]
public class PaginationBar : System.Web.UI.WebControls.WebControl
{
public static int GetRequestPageS()
{
HttpRequest request = HttpContext.Current.Request;
if(request.Form["__VIEWSTATE"]!=null &&request.Form["__VIEWSTATE"].Trim() != "")
{
//IsPostBack
return 1;
}
int intPage = PageUtility.GetRequestID("Page");
intPage = Math.Max(1,intPage);
return intPage;
}
public int GetRequestPage()
{
return GetRequestPageS();
}
private int _CurrentPage = 1;
private int _PageSize = Constant.PAGE_SIZE;
private int _ItemCount = 0;
private string _UrlParameter = "";
/// <summary>
/// 当前页(1开始)
/// </summary>
public int CurrentPage
{
get
{
return this._CurrentPage;
}
set
{
this._CurrentPage = value;
}
}
/// <summary>
/// 页索引(0开始)
/// </summary>
public int PageIndex
{
get
{
return CurrentPage -1;
}
set
{
CurrentPage = value + 1;
}
}
/// <summary>
/// 每页显示数
/// </summary>
public int PageSize
{
get
{
return this._PageSize;
}
set
{
this._PageSize = value;
}
}
/// <summary>
/// 所有数据数
/// </summary>
public int ItemCount
{
get
{
return this._ItemCount;
}
set
{
this._ItemCount = value;
}
}
/// <summary>
/// 页面地址
/// </summary>
public string UrlParameter
{
get
{
return this._UrlParameter;
}
set
{
this._UrlParameter = value;
}
}
private int _intPages = 0;
/// <summary>
/// 赋值
/// </summary>
/// <param name="PageIndex">当前页</param>
/// <param name="PageSize">每页显示数</param>
/// <param name="ItemCount">所有数据数</param>
/// <param name="UrlParameter">页面地址</param>
public void SetValues(int PageIndex, int PageSize, int ItemCount, string UrlParameter)
{
this.PageIndex = PageIndex;
this.PageSize = PageSize;
this.ItemCount = ItemCount;
this.UrlParameter = UrlParameter;
}
/// <summary>
/// 将此控件呈现给指定的输出参数。
/// </summary>
/// <param name="output"> 要写出到的 HTML 编写器 </param>
protected override void Render(HtmlTextWriter output)
{
if (PageSize <= 0)
PageSize = 1;
_intPages = ItemCount / PageSize;
if (ItemCount % PageSize != 0)
_intPages++;
string strScript = @"
<script language='javascript'>
function PageBarSelect_onchange()
{
var sel = document.getElementById('PageBarSelect');
window.location.href = '" + UrlParameter + @"'+sel.options[sel.selectedIndex].value ;
}
function PageBarKeyDownEvent()
{
if(window.event.keyCode == 13 || window.event.keyCode == 10)
{
PageBarClick();
return;
}
if((window.event.keyCode>95 && window.event.keyCode<106)
|| (window.event.keyCode>47 && window.event.keyCode<59)
|| window.event.keyCode == 8
|| window.event.keyCode == 46
|| window.event.keyCode == 37
|| window.event.keyCode == 39)
{
}
else
{
window.event.returnValue =0;
return false;
}
}
function PageBarClick()
{
var i = document.getElementById('PateBarText').value ;
if(PageBarValidate())
{
window.location.href= '" + UrlParameter + @"' + i;
}
else
{
return false;
}
}
function PageBarValidate()
{
var min=1;
var max={2};
var txt = document.getElementById(""PateBarText"");
if( ( isNaN(Math.floor(txt.value) ))
|| ( Math.floor(txt.value)!=txt.value )
|| ( txt.value<min||txt.value>max ) )
{
alert(""请输入1到""+max);
txt.focus();
txt.select();
return false;
}
return true;
}
</script>";
strScript = strScript.Replace("{2}", this._intPages.ToString());
output.Write(strScript);
string lnkFirstPageHRef, lnkPrePageHRef, lnkNextPageHRef, lnkEndPageHRef;
if (this._intPages > 1)
{
if (CurrentPage == 1)
{
lnkFirstPageHRef = "";
lnkPrePageHRef = "";
}
else
{
lnkFirstPageHRef = "href=/"" + UrlParameter + "1" + "/"";
lnkPrePageHRef = "href=/"" + UrlParameter + ( CurrentPage - 1).ToString() + "/"";
}
if (CurrentPage == this._intPages)
{
lnkNextPageHRef = "";
lnkEndPageHRef = "";
}
else
{
lnkNextPageHRef = "href=/"" + UrlParameter + (CurrentPage+1).ToString() + "/"";
lnkEndPageHRef = "href=/"" + UrlParameter + this._intPages.ToString() + "/"";
}
}
else
{
lnkFirstPageHRef = "";
lnkPrePageHRef = "";
lnkNextPageHRef = "";
lnkEndPageHRef = "";
}
output.Write("<div align=/"center/">");
output.Write(string.Format("总计 <span><strong>{0}</strong></span> 条，分 <span><strong>{1}</strong></span> 页显示，当前第<span><strong>{2}</strong></span>页 ",
ItemCount,
_intPages,
CurrentPage));
output.Write(string.Format("<a {0}>首页</a> ", lnkFirstPageHRef));
output.Write(string.Format("<a {0}>上一页</a> ", lnkPrePageHRef));
output.Write(string.Format("<a {0}>下一页</a> ", lnkNextPageHRef));
output.Write(string.Format("<a {0}>末页</a> ", lnkEndPageHRef));
if(_intPages<=50)
{
//多于50页没有下拉框
output.Write("跳转至第");
output.Write("<select name=/"PageBarSelect/" id=/"PageBarSelect/" onchange=/"return PageBarSelect_onchange()/">");
for (int i = 1; i <= _intPages ; i++)
{
if (CurrentPage == i)
{
output.Write(string.Format("<option selected value=/"{0}/">{2}/{1}</option>", i.ToString(), _intPages, i));
}
else
{
output.Write(string.Format("<option value=/"{0}/">{2}/{1}</option>", i.ToString(), _intPages, i));
}
}
output.Write("</select> 页 ");
}
output.Write(string.Format("<input id=/"PateBarText/" name=/"PateBarText/" type=/"text/" size=/"3/" value=/"/" onkeydown=/"return PageBarKeyDownEvent()/" maxlength=/"10/"> ",
this.ClientID));
output.Write("<INPUT language=/"javascript/" onclick=/"return PageBarClick()/" type=/"button/" value=/"go/"> ");
output.Write(" ");
output.Write("</div>");
}
}
}