gistfile1.cs

/// <summary>
/// sets the paging control's properties
/// </summary>
protected void FormatPagingControl()
{
    //number of page links
    int n = 4;
    int lastpage = ((RowCount -1) / itemsPerPage) + 1;            
    int startPage = CurrentPage;
    int lastPageToDisplay = Math.Min(lastpage, startPage + (n-1));

    //if we have only page, do not show paging controls
    if (RowCount <= itemsPerPage)
    {
        plcPaging.Visible = false;
        return;
    }
    else plcPaging.Visible = true;
    //in the case that current page is not in the first n pages and belongs to last (n-1) pages 
    //current page will not be the first page link.
    int numberOfPagesDisplayed = lastPageToDisplay - startPage + 1;
    
    //make sure we display maximum number of page links as possible.
    if(numberOfPagesDisplayed < n)
    {
        //push start page back 
        startPage -= (n - numberOfPagesDisplayed);               
    }
    if (startPage < 1)
        startPage = 1;
    /*
     * Now, using startpage and lastPageToDisplay,perform render  
     * */

    //previous and next buttons
    prevLnk.Visible = (startPage > 1);
    nextLnk.Visible = (lastPageToDisplay < lastpage);
    //page links and spacers
    for (int i = 1; i <= n; ++i)
    {
        LinkButton lnk = ((plcPaging.FindControl("lnkPage" + i)) as LinkButton);
        Label spacer = ((plcPaging.FindControl("spacer" + i)) as Label);
        int displayNum = startPage + i - 1;
        //visible if page's number is less than or equal to last page to display
        spacer.Visible = lnk.Visible = displayNum <= lastPageToDisplay;
        //make final spacer invisible
        if (i != 1 && lnk.Visible == false)
            ((plcPaging.FindControl("spacer" + (i - 1).ToString())) as Label).Visible = false;
        //set text
        lnk.Text = displayNum.ToString();
        //grey out if page represents current page
        lnk.Enabled = (CurrentPage != displayNum);
             
    }                    
    
}