I'm working on the book "Beginning Aspnet E-Commerce with C#", but I have encountered a problem. The tutorial includes a Pager Control, this works fine for all of the products it is just when the a department is selected the pager does not work, only after a Category is selected that it works.
// 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();
}
}
}public partial class UserControls_ProductsList : System.Web.UI.UserControl
{
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));
}
}
}Can anyone please assist me with this?