Forms Data Controls :: Paging Datalist - Display The Next Page Of Results Doesn't Do Anything

Feb 9, 2010

I have a datalist and want the results paged I have written a pager.ascx page and have an aspx and aspx.cs page to display the results. I have a stored procedure to pull the data out of the database and a class to talk between the stored procedure and presentation controls I have the pager being displayed when the results get over the limit I have set to 10 in the web.config file but when i click on the next link to display the next page of results it doesn't do anything. my aspx page is

<uc1:Pager ID="topPager" runat="server" Visible="False" />
<asp:DataList ID="newsList" runat="server" CssClass="List" align="center">
<ItemStyle CssClass="ItemList" />
<h2><%# Eval("Title") %></h2>
<p>Posted <%# Eval("Date") %></p>
<p><%# Eval("News").ToString().Replace("
", "<br />") %></p>
<uc1:Pager ID="bottomPager" runat="server" Visible="False" />
my aspx.cs page is
protected void Page_Load(object sender, EventArgs e)
// Retreive page from the query string
string page = Request.QueryString["Page"];
if (page == null) page = "1";
// How many pages of posts
int howManyPages = 1;
// pager links format
string firstPageUrl = "";
string pagerFormat = "";
//DataAccess.GetNews returns a DataTable object containing news data which is read into datalist
newsList.DataSource = DataAccess.GetNews(page, out howManyPages);
// Bind the data to the data source
// have the current page as interger
int currentPage = Int32.Parse(page);
// Display pager controls
topPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, false);
bottomPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, true);
my pager.ascx page is
<asp:Label ID="currentPagelabel" runat="server" />
<asp:Label ID="howManyPageLabel" runat="server" />
<asp:HyperLink ID="previousLink" runat="server">Previous</asp:HyperLink>
<asp:Repeater ID="pagesRepeater" runat="server">
<asp:HyperLink ID="hyperlink" runat="server" Text='<%# Eval("Page") %>' NavigateUrl='<%# Eval("Url") %>' />
<asp:HyperLink ID="nextLink" runat="server">Next</asp:HyperLink>
my pager.aspx.cs page is
using System;
// Simple struct that represents a (page number, url) association
public struct PageUrl
private string page;
private string url;
// Page property definition
public string Page
return page;
// Url property definition
public string Url
return url;
// Constructor
public PageUrl(string page, string url)
{ = page;
this.url = url;
// The pager control
public partial class UserControls_Pager : System.Web.UI.UserControl
protected void Page_Load(object sender, EventArgs e)
// Show the pager
public void Show(int currentPage, int howManyPages, string firstPageUrl, string pageUrlFormat, bool showPages)
// Display paging controls
if (howManyPages > 1)
// make the pager visable
this.Visible = true;
// Display the current page
currentPagelabel.Text = currentPage.ToString();
howManyPageLabel.Text = howManyPages.ToString();
// Create the Previous link
if (currentPage == 1)
previousLink.Enabled = false;
previousLink.NavigateUrl = (currentPage == 2) ? firstPageUrl : String.Format(pageUrlFormat, currentPage - 1);
// Create the Next link
if (currentPage == howManyPages)
nextLink.Enabled = false;
nextLink.NavigateUrl = String.Format(pageUrlFormat, currentPage + 1);
// Create the page links
if (showPages)
// The list of pages and their URLs as an array
PageUrl[] pages = new PageUrl[howManyPages];
// Generate (page, url) elements
pages[0] = new PageUrl("1", firstPageUrl);
for (int i = 2; i <= howManyPages; i++)
pages[i - 1] = new PageUrl(i.ToString(), String.Format(pageUrlFormat, i));
// Do not generate a link for current page
pages[currentPage - 1] = new PageUrl((currentPage).ToString(), "");
// Feed the pages to the repeater
pagesRepeater.DataSource = pages;
my class file is
// Retreive the list of news posts
public static DataTable GetNews(string pageNumber, out int howManyPages)
// Get a configured DbCommand object
DbCommand comm = GenericDataAccess.CreateCommand();
// Set the stored procedure name
comm.CommandText = "GetNews";
// create a new parameter for page number
DbParameter param = comm.CreateParameter();
param.ParameterName = "@PageNumber";
param.Value = pageNumber;
param.DbType = DbType.Int32;
// create a new parameter for products per page
param = comm.CreateParameter();
param.ParameterName = "@PostsPerPage";
param.Value = PlatiumMindProductionsConfiguration.PostsPerPage;
param.DbType = DbType.Int32;
param = comm.CreateParameter();
param.ParameterName = "@HowManyPosts";
param.Direction = ParameterDirection.Output;
param.DbType = DbType.Int32;
// Execute the stored procedure and saven the results in a DataTable
DataTable table = GenericDataAccess.ExecuteSelectCommand(comm);
// Calculate how many pages of posts and set the out parameter
int howManyPosts = Int32.Parse(comm.Parameters["@HowManyPosts"].Value.ToString());
howManyPages = (int)Math.Ceiling((double)howManyPosts / (double)PlatiumMindProductionsConfiguration.PostsPerPage);
// return the page of posts
return table;
my stored procedure is
(@PageNumber INT,
@PostsPerPage INT,
@HowManyPosts INT OUTPUT)
-- Declare a new table
(RowNumber INT,
Title NVARCHAR(50),
-- Populate the table with the complete list
NewsID, Title, Date, News
-- return the total number of posts
SELECT @HowManyPosts = COUNT(NewsID) FROM News
-- extract the request page of posts
SELECT NewsID, Title, DATE, News
FROM @News
WHERE RowNumber > (@PageNumber - 1) * @PostsPerPage
AND RowNumber <= @PageNumber * @PostsPerPage

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