Pager Control

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C#

Hi, I'm working on the book "Beginning Aspnet e-Commerce in C#". But I have a problem with the pager control, my products pager works, it's just when the website is opened in Default.aspx that the Department specials pager do not work.

Can anyone assist me please?

Pager.ascx.cs

// simple struct that represent a (page number, url) association
public struct PageURL
{
    private string page;
    private string url;
    
        // page and url property definitions
    public string Page
    {
        get
        {
            return page;
        }
    }
    public string URL
    {
        get
        {
            return url;
        }
    }
        // constructor
    public PageURL(string page, string url)
    {
        this.page = page;
        this.url = url;
    }
}
    // the Pager control
public partial class UserControls_Pager : System.Web.UI.UserControl
{
        // 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 visible
            this.Visible = true;
                // display the  current page
            currentPageLabel.Text = currentPage.ToString();
            howManyPagesLabel.Text = howManyPages.ToString();
                // create the previous link
            if (currentPage == 1)
            {
                previousLink.Enabled = false;
            }
            else
            {
                previousLink.NavigateUrl = (currentPage == 2) ?
                    firstPageURL : String.Format(pageURLFormat, currentPage - 1);
            }
                // create the next link
            if (currentPage == howManyPages)
            {
                nextLink.Enabled = false;
            }
            else
            {
                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 the current page
                pages[currentPage - 1] = new PageURL((currentPage).ToString(), "");
                    // feed the pages to the repeater
                pagesRepeater.DataSource = pages;
                pagesRepeater.DataBind();
            }
        }
    }

ProductsList.ascx.cs

protected void Page_Load(object sender, EventArgs e)
    {
        PopulateControls();
    }

    private void PopulateControls()
    {
            // retrieve DepartmentId from the queryString
        string departmentId = Request.QueryString["DepartmentID"];
            // retrieve CategoryId from the queryString
        string categoryId = Request.QueryString["CategoryID"];
            // retrieve Page from the queryString
        string page = Request.QueryString["Page"];
        if (page == null) page = "1";
            // retrieve SearchString from QueryString
        string searchString = Request.QueryString["Search"];
            // how many pages of products
        int howManyPages = 1;
            // pager links format
        string firstPageURL = "";
        string pagerFormat = "";

            // if performing a product search
        if (searchString != null)
        {
                // retrieve allWords from QueryString
            string allWords = Request.QueryString["AllWords"];
                // perform search
            list.DataSource = CatalogAccess.Search(searchString, allWords,
                page, out howManyPages);
            list.DataBind();
                // display pager
            firstPageURL = Link.ToSearch(searchString, allWords.ToUpper() ==
                "TRUE", "1");
            pagerFormat = Link.ToSearch(searchString, allWords.ToUpper() ==
                "TRUE", "{0}");
        }
            // if browsing a category...
        else if (categoryId != null)
        {
                // retrievelist of products in a category
            list.DataSource =
                CatalogAccess.GetProductsInCategory(categoryId, page, out howManyPages);
            list.DataBind();
                // get first page url and pager format
            firstPageURL = Link.ToCategory(departmentId, categoryId, "1");
            pagerFormat = Link.ToCategory(departmentId, categoryId, "{0}");
        }
        else if (departmentId != null)
        {
            // retrieve list of products on department promotion
            list.DataSource =
                CatalogAccess.GetProductsOnDeptPromo(departmentId, page, out howManyPages);
            list.DataBind();
            // get first page url and pager format
            firstPageURL = Link.ToDepartment(departmentId, "1");
            pagerFormat = Link.ToDepartment(departmentId, "{0}");
        }
        else
        {
            // retrieve list of products on catalog promotion
            list.DataSource =
                CatalogAccess.GetProductsOnCatPromo(page, out howManyPages);
            list.DataBind();
            // have the current page as an integer
            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);
    }

    protected void list_ItemDataBound(object sender, DataListItemEventArgs e)
    {
            // execute when each item of the list is bound to the data source
        DataRowView dataRow = (DataRowView)e.Item.DataItem;
        string productId = dataRow["ProductID"].ToString();
        DataTable attrTable = CatalogAccess.GetProductAttributes(productId);

            // get the attribute placeHolder
        PlaceHolder attrPlaceHolder =
            (PlaceHolder)e.Item.FindControl("attrPlaceHolder");

            // temp variables
        string prevAttributeName = "";
        string attributeName = "";
        string attributeValue = "";
        string attributeValueId = "";

            // current dropdown for attribute values
        Label attributeNameLabel;
        DropDownList attributeValuesDropDown = new DropDownList();

            // read the list of attributes
        foreach (DataRow r in attrTable.Rows)
        {
                // get attribute data
            attributeName = r["AttributeName"].ToString();
            attributeValue = r["AttributeValue"].ToString();
            attributeValueId = r["AttributeValueID"].ToString();

                // if starting a new attribute
            if (attributeName != prevAttributeName)
            {
                prevAttributeName = attributeName;
                attributeNameLabel = new Label();
                attributeNameLabel.Text = attributeName + ": ";
                attributeValuesDropDown = new DropDownList();
                attrPlaceHolder.Controls.Add(attributeNameLabel);
                attrPlaceHolder.Controls.Add(attributeValuesDropDown);
            }
                // add a new attribute value to the dropdown list
            attributeValuesDropDown.Items.Add(new ListItem(attributeValue, attributeValueId));
        } 
    }