刚刚开始学.net的时候连改带写做的,现在不怎么用到....倒是觉得jquery.pager好用点...
[DefaultProperty(
"
Text
"
),
ToolboxData(
"
<{0}:CollectionPager runat=server></{0}:CollectionPager>
"
)]
public
class
Pager : UserControl

{

const string#region const string


const string PAGER = "<label class=\"
{1}\">{0}</label>";

const string LINK = "<a href=\"
{1}\">{0}</a>";

#endregion


pages#region pages

private int maxPages;
private int pageIndex = 1;
private int recordCount = 0;
private int pageSize = 10;
private int sliderSize = 8;
private bool showFirstLast = true;

private string queryStringKey = "PageIndex";

#endregion


back/next first/last#region back/next first/last

private string backText = "Back";
private string nextText = "Next";
private string firstText = "First";
private string lastText = "Last";

[Bindable(true), Category("back/next first/last"), Localizable(true)]
public virtual string BackText

{

get
{ return backText; }

set
{ backText = value; }
}
[Bindable(true), Category("back/next first/last"), Localizable(true)]
public virtual string NextText

{

get
{ return nextText; }

set
{ nextText = value; }
}
[Bindable(true), Category("back/next first/last"), Localizable(true)]
public virtual string FirstText

{

get
{ return firstText; }

set
{ firstText = value; }
}
[Bindable(true), Category("back/next first/last"), Localizable(true)]
public virtual string LastText

{

get
{ return lastText; }

set
{ lastText = value; }
}

#endregion


control attribute#region control attribute

[Bindable(false), Category("Appearance")]
public bool ShowFirstLast

{
get

{
return showFirstLast;
}

set

{
showFirstLast = value;
}
}

[Bindable(true), Category("Appearance"), Localizable(true)]
public int SliderSize

{

get
{ return sliderSize; }

set
{ sliderSize = value; }
}

[Bindable(true), Category("Appearance"), Localizable(true)]
public virtual string QueryStringKey

{

get
{ return queryStringKey; }

set
{ queryStringKey = value; }
}


[Bindable(true), Category("Appearance"), Localizable(true)]
public virtual int PageIndex

{
get

{
if (Request[queryStringKey] != null)

{
int.TryParse(Request[queryStringKey].ToString(), out pageIndex);
}
return pageIndex;
}
set

{
pageIndex = value;
}
}

[Bindable(true), Category("Appearance"), Localizable(true)]
public virtual int RecordCount

{
get

{
return recordCount;
}
set

{
recordCount = value;
}
}

[Bindable(true), Category("Appearance"), Localizable(true)]
public virtual int PageSize

{
get

{
return pageSize;
}
set

{
pageSize = value;
}
}

[Bindable(false), Category("Appearance"), Localizable(true)]
public virtual int PageCount

{
get

{
int PageCount = 0;
PageCount = RecordCount / PageSize;
if ((RecordCount % PageSize) != 0)

{
PageCount++;
}
if (PageCount > maxPages)

{
PageCount = maxPages;
}
return PageCount;
}
}

#endregion


Separator#region Separator

private string pageNumbersSeparator = " - ";
private string backNextSeparator = " . ";
private string numbersSectionSeparator = " ";

[Bindable(false), Category("Separator"), Localizable(true)]
public string NumbersSectionSeparator

{

get
{ return numbersSectionSeparator; }

set
{ numbersSectionSeparator = value; }
}

[Bindable(false), Category("Separator"), Localizable(true)]
public string BackNextSeparator

{

get
{ return backNextSeparator; }

set
{ backNextSeparator = value; }
}

[Bindable(false), Category("Separator"), Localizable(true)]
public string PageNumbersSeparator

{

get
{ return pageNumbersSeparator; }

set
{ pageNumbersSeparator = value; }
}

#endregion


CssClass#region CssClass

private string pagerCssClass = "PagerCssClass";
private string pagerNumbersCssClass = "PagerNumbersCssClass";
private string pagerSectionCssClass = "PagerSectionCssClass";


/**//// <summary>
/// 跳转主样式
/// </summary>
[Bindable(true), Category("Appearance"), Localizable(true)]
public string PagerSectionCssClass

{

get
{ return pagerSectionCssClass; }

set
{ pagerSectionCssClass = value; }
}


/**//// <summary>
/// 页码显示样式
/// </summary>
[Bindable(true), Category("Appearance"), Localizable(true)]
public string PagerNumbersCssClass

{

get
{ return pagerNumbersCssClass; }

set
{ pagerNumbersCssClass = value; }
}


/**//// <summary>
/// 分页主样式
/// </summary>
[Bindable(true), Category("Appearance"), Localizable(true)]
public string PagerCssClass

{

get
{ return pagerCssClass; }

set
{ pagerCssClass = value; }
}


#endregion


public method#region public method
static public string UpdateQueryStringItem(System.Web.HttpRequest httpRequest, string queryStringKey, string newQueryStringValue)

{
string NewURL = httpRequest.RawUrl;
if (httpRequest.QueryString[queryStringKey] != null)

{
string OrignalSet = String.Format("{0}={1}", queryStringKey, httpRequest.QueryString[queryStringKey]);
string NewSet = String.Format("{0}={1}", queryStringKey, newQueryStringValue);
if (newQueryStringValue.Trim() == "")

{
NewURL = Regex.Replace(NewURL, "&" + OrignalSet, "", RegexOptions.IgnoreCase);
NewURL = Regex.Replace(NewURL, "?" + OrignalSet + "&", "?", RegexOptions.IgnoreCase);
NewURL = Regex.Replace(NewURL, "?" + OrignalSet, "", RegexOptions.IgnoreCase);
}
else

{
NewURL = Regex.Replace(NewURL, OrignalSet, NewSet, RegexOptions.IgnoreCase);
}
}
else if (newQueryStringValue.Trim() != "")

{
if (httpRequest.QueryString.Count == 0)

{
NewURL += string.Format("?{0}={1}", queryStringKey, newQueryStringValue);
}
else

{
NewURL += string.Format("&{0}={1}", queryStringKey, newQueryStringValue);
}
}
return NewURL;
}


/**//// <summary>
/// Number?
/// </summary>
/// <param name="Text"></param>
/// <returns></returns>
public static bool IsNumeric(string Text)

{
if (Text == "" || Text == null)

{
return false;
}
Text = Text.Trim();
bool bResult = Regex.IsMatch(Text, @"^\d+$");
return bResult;
}
#endregion


build numbers and BACK/NEXT section#region build numbers and BACK/NEXT section

protected virtual string BuildPageNumbers(int currentPage, int pageCount)

{
StringBuilder Pages = new StringBuilder();

int StartPage = 1;

//End Page
int EndPage = 0;
if (pageCount > maxPages)

{
EndPage = maxPages;
}
else

{
EndPage = pageCount;
}

//Adjust for slider
int Half = (int)Math.Floor((double)(SliderSize - 1) / 2);
//8: Half = 3
//7: Half = 3

int NumAbove = currentPage + Half + ((SliderSize - 1) % 2);
int NumBelow = currentPage - Half;

if (NumBelow < 1)

{
NumAbove += (1 - NumBelow);
NumBelow = 1;
}

if (NumAbove > EndPage)

{
NumBelow -= (NumAbove - EndPage);
if (NumBelow < 1)

{
NumBelow = 1;
}
NumAbove = EndPage;
}

StartPage = NumBelow;
EndPage = NumAbove;

for (int i = StartPage; i <= EndPage; i++)

{
int RecordStart;
int RecordEnd;

//For Display
if (Context == null)

{
RecordStart = ((i - 1) * PageSize) + 1;
RecordEnd = i * PageSize;

if (i > StartPage)

{
if (PageNumbersSeparator.ToLower() == " ")

{
Pages.AppendFormat("{0}", PageNumbersSeparator);
}
else

{
Pages.AppendFormat(" {0} ", PageNumbersSeparator);
}
}

if (i == StartPage)

{
Pages.AppendFormat("<B>{0}</B>", i.ToString());
}
else

{
Pages.AppendFormat("<a href='#'>{0}</a>", i.ToString());
}
}
else

{
RecordStart = ((i - 1) * PageSize) + 1;
if (i * PageSize > RecordCount)

{
RecordEnd = RecordCount;
}
else if (RecordCount == PageSize)

{
RecordEnd = (RecordStart - 1) + PageSize;
}
else

{
RecordEnd = (RecordStart - 1) + RecordCount;
}

if (i > StartPage)

{
if (PageNumbersSeparator.ToLower() == " ")

{
Pages.AppendFormat("{0}", PageNumbersSeparator);
}
else

{
Pages.AppendFormat(" {0} ", PageNumbersSeparator);
}
}

if (i == currentPage)

{
Pages.AppendFormat("<B>{0}</B>", i.ToString());
}
else

{
Pages.AppendFormat(LINK
, i
, UpdateQueryStringItem(Context.Request, QueryStringKey, i.ToString()));
}
}
}
return Pages.ToString();
}

protected virtual string BuildLinkNavBack(int currentPage)

{
StringBuilder LinkNav = new StringBuilder();

//Next Links
if (currentPage == 1 || RecordCount == 0)

{
if (ShowFirstLast)

{
LinkNav.Append(FirstText + " ");
}
LinkNav.Append(BackText);
}
else

{
if (ShowFirstLast)

{
LinkNav.AppendFormat(LINK + " "
, FirstText
, UpdateQueryStringItem(Context.Request, QueryStringKey, Convert.ToString(1)));
}
LinkNav.AppendFormat(LINK
, BackText
, UpdateQueryStringItem(Context.Request, QueryStringKey, Convert.ToString(currentPage - 1)));
}

return LinkNav.ToString();
}

protected virtual string BuildLinkNavNext(int currentPage, int pageCount)

{
StringBuilder LinkNav = new StringBuilder();

if (Context == null)

{
LinkNav.AppendFormat("<a href='#'>{0}</a>", NextText);
if (ShowFirstLast)

{
LinkNav.AppendFormat(" <a href='#'>{0}</a>", LastText);
}
}
else if (currentPage >= maxPages || currentPage == PageCount)

{
LinkNav.Append(NextText);
if (ShowFirstLast)

{
LinkNav.Append(" " + LastText);
}
}
else

{
LinkNav.AppendFormat("<a href='{0}'>{1}</A>"
, UpdateQueryStringItem(Context.Request, QueryStringKey, Convert.ToString(currentPage + 1))
, NextText);
if (ShowFirstLast)

{
LinkNav.AppendFormat(" <a href='{0}'>{1}</A>"
, UpdateQueryStringItem(Context.Request, QueryStringKey, Convert.ToString(pageCount))
, LastText);
}
}

return LinkNav.ToString();
}

#endregion


Render method#region Render method

protected override void OnPreRender(EventArgs e)

{
maxPages = RecordCount / PageSize;
base.OnPreRender(e);
}

protected override void Render(HtmlTextWriter writer)

{
StringBuilder sb = new StringBuilder();

sb.Append(BuildPageNumbers(PageIndex, PageCount));
sb.Append(NumbersSectionSeparator);
sb.Append(BuildLinkNavBack(PageIndex));
sb.Append(BackNextSeparator);
sb.Append(BuildLinkNavNext(PageIndex, PageCount));
writer.Write(string.Format(PAGER, sb.ToString(), PagerCssClass));
base.Render(writer);
}

#endregion
}

调用方法
<%
@ Register TagPrefix="Repeater" Namespace="Freshers.Component" Assembly="Freshers"
%>

<
Repeater:Pager
ID
="Pager"
runat
="server"
SliderSize
="5"
BackText
="上一页"
NextText
="下一页"
FirstText
="首页"
LastText
="尾页"
PageSize
="10"
RecordCount
="100"
/>
