Theme Not Working In Final Page

Rajasekar1988 · June 11th, 2012, 08:31 AM

BASE PAGE CODING:

public class BasePage : System.Web.UI.Page
{
public BasePage()
{
//
// TODO: Add constructor logic here
//
this.PreRender += new EventHandler(Page_PreRender);
this.PreInit += new EventHandler(Page_PreInit);
}

private void Page_PreRender(object sender, EventArgs e)
{
if ((this.Title == "Untitled Page") || (string.IsNullOrEmpty(this.Title)))
{
throw new Exception(
"Page title cannot be \"Untitled Page\" or an empty string.");
}
}

private void Page_PreInit(object sender, EventArgs e)
{
HttpCookie preferredTheme = Response.Cookies.Get("PreferredTheme");
if (preferredTheme != null)
{
Page.Theme = preferredTheme.Value;
}
}
}

MASTER PAGE CODING:

public partial class MasterPages_FrontEnd : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string selectedTheme = Page.Theme;
HttpCookie preferredTheme = Request.Cookies.Get("PreferredTheme");
if (preferredTheme != null)
{
selectedTheme = preferredTheme.Value;
}
if (!string.IsNullOrEmpty(selectedTheme) &&
ThemeSelect.Items.FindByValue(selectedTheme) != null)
{
ThemeSelect.Items.FindByValue(selectedTheme).Selec ted = true;
}
}
switch (Page.Theme.ToLower())
{
case "darkgrey":
Menu1.Visible = false;
TreeView1.Visible = true;
break;
case "monochrome":
Menu1.Visible = true;
TreeView1.Visible = false;
break;
}
}
protected void ThemeSelect_SelectedIndexChanged(object sender, EventArgs e)
{
HttpCookie preferredTheme = Request.Cookies["PreferredTheme"];
if (preferredTheme == null)
{
preferredTheme = new HttpCookie("PreferredTheme");
}
preferredTheme.Expires = DateTime.Now.AddMonths(3);
preferredTheme.Value = ThemeSelect.SelectedValue;
Response.Cookies.Add(preferredTheme);
Response.Redirect(Request.Url.ToString());
}
}

WEB.CONFIG:

<?xml version="1.0"?>

<configuration>

<system.web>
<compilation debug="true" targetFramework="4.0" />
<pages theme ="Monochrome"></pages>
</system.web>

</configuration>

Imar · June 11th, 2012, 08:42 AM

Hi there,

Take another look at the exercise on page 231. The code in Page_PreInit should access Request.Cookies, not Response.Cookies as you have....

Cheers,

Imar

Rajasekar1988 · June 12th, 2012, 02:05 AM

Hello Mr. Imar, I'm trying to add a new sitemapnode to the one we are using in Planet Wrox but wat i'm getting is the element 'X' in namespace has invalid child element in sitemapnode in namespace..

Imar · June 12th, 2012, 08:29 AM

Hi there,

As suggested earlier, please start a new thread for a new topic. Your last question has nothing to do with the BasePage, so a new thread with your question is a much better solution.

Also, consider using the book's own forum at: http://p2p.wrox.com/book-beginning-asp-net-4-c-vb-560/

Finally, please consider searching the forums before you post anew topic to see if someone else had the same question. In your case, the answer to your problem can be found here: Ch.7 Pg.247 - Web.sitemap

Cheers,

Imar