Self-write paging algorithm

I encapsulate it in the user control. You can also encapsulate it in class files. Custom:
[Csharp]
Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Web;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using System. Text;
 
Namespace HHWeb. UserControl
{
Public partial class Paging: System. Web. UI. UserControl
{
Public StringBuilder PagingControlInfo = new StringBuilder ();
Protected void Page_Load (object sender, EventArgs e)
{
GetPaging ();
}
Void GetPaging ()
{
// Determine if the current page is negative or zero, NowPage = 1
If (NowPage <= 0)
NowPage = 1;
// Determine if the current page is greater than the total number of pages, NowPage = PageCount
Int PageCount = GetPageCount ();
If (NowPage> PageCount)
NowPage = PageCount;
// Homepage and previous page ()
If (NowPage! = 1)
{
PagingControlInfo. Append ("<a href = \" "+ PageName + "? NowPage = 1 \ "> homepage </a> ");
PagingControlInfo. Append ("<a href = \" "+ PageName + "? NowPage = "+ (NowPage-1) +" \ "> previous page </a> ");
}
// If the total page number is smaller than the page number (PageNumber), The ellipsis (...) is not displayed (...)
If (PageCount <= PageNumber)
{
For (int I = 1; I <= PageCount; I ++)
GetPageNumberStr (I );
}
Else
{
If (PageNumber % 2! = 0)
{
LeftPageNumberOne = (PageNumber/2) + 1;
LeftPageNumberTwo = (PageNumber/2 );
RightPageNumber = (PageNumber/2 );
}
Else
{
LeftPageNumberOne = (PageNumber/2) + 1;
LeftPageNumberTwo = (PageNumber/2 );
RightPageNumber = (PageNumber/2)-1;
}
// When the total page number is greater than the page number (PageNumber) (simple processing-algorithm)
If (NowPage> LeftPageNumberOne & NowPage <PageCount-RightPageNumber)
{
PagingControlInfo. Append ("<span>... </span> ");
For (int I = NowPage-LeftPageNumberTwo; I <= NowPage + RightPageNumber; I ++)
GetPageNumberStr (I );
PagingControlInfo. Append ("<span>... </span> ");
}
Else if (NowPage> = PageCount-RightPageNumber)
{
PagingControlInfo. Append ("<span>... </span> ");
For (int I = (PageCount-PageNumber) + 1; I <= PageCount; I ++)
GetPageNumberStr (I );
}
Else
{
For (int I = 1; I <= PageNumber; I ++)
GetPageNumberStr (I );
PagingControlInfo. Append ("<span>... </span> ");
}
}
// Next and last pages
If (NowPage! = PageCount)
{
PagingControlInfo. Append ("<a href = \" "+ PageName + "? NowPage = "+ (NowPage + 1) +" \ "> next page </a> ");
PagingControlInfo. Append ("<a href = \" "+ PageName + "? NowPage = "+ PageCount +" \ "> last page </a> ");
}
}
 
# Region // page number splicing Method
Public void GetPageNumberStr (int I)
{
If (I = NowPage)
PagingControlInfo. Append ("<a href = \" "+ PageName + "? NowPage = "+ I +" \ "style = \" border: 0px; color: # ff5a00; \ ">" + I + "</a> ");
Else
PagingControlInfo. Append ("<a href = \" "+ PageName + "? NowPage = "+ I +" \ ">" + I + "</a> ");
}
# Endregion
 
# Region // calculate the total number of pages
Public int GetPageCount ()
{
If (PageSize = 0)
PageSize = 20; // if the number of records displayed on each page is "0", the default value is "20"
If (Totalcount % PageSize = 0)
Return (Totalcount/PageSize );
Else
Return (Totalcount/PageSize) + 1;
}
# Endregion
 
# Region // basic attributes required for paging
/// <Summary>
/// Current page
/// </Summary>
Public int NowPage {get; set ;}
/// <Summary>
/// Number of records displayed on each page
/// </Summary>
Public int PageSize {get; set ;}
/// <Summary>
/// Total number of entries
/// </Summary>
Public int Totalcount {get; set ;}
/// <Summary>
/// Page number (indicating the number of pages displayed by the front-end Page Control)
/// </Summary>
Public int PageNumber {get; set ;}
/// <Summary>
/// The name of the current page, for example, "index. aspx"
/// </Summary>
Public string PageName {get; set ;}
# Endregion
 
# Region // basic page attributes
/// <Summary>
/// Attribute 1 of the Left page number
/// </Summary>
Public int LeftPageNumberOne {get; set ;}
/// <Summary>
/// Attribute 2 of the Left page number
/// </Summary>
Public int LeftPageNumberTwo {get; set ;}
/// <Summary>
/// Right page number
/// </Summary>
Public int RightPageNumber {get; set ;}
# Endregion
}
}

The effect is as follows: Click the paging style and you will be OK. Www.2cto.com

Author: yfz19890410