Hi,
New to ASP.NET but not to programming.
Currently working on the Theme change drop down list on page 223 but am running into some errors.

This has been solved, I found another post with the same problem and solution.
When I try to change the ID to "1stpreferredTheme" I get the message "is not a valid name for the control" so I just leave of the "1st".
Second problem is when I code the event handler for the drop down list the code "PreferredTheme.Value = PreferredTheme.SelectedValue" gives me the error 'SelectedValue' is not a member of 'System.Web.HttpCookie'



This is the code so far.....

Partial Class MasterPage
Inherits System.Web.UI.MasterPage
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles 1stPreferredTheme.SelectedIndexChanged
Dim PreferredTheme As HttpCookie = New HttpCookie("PreferredTheme")
PreferredTheme.Expires = DateTime.Now.AddMonths(3)
PreferredTheme.Value = PreferredTheme.SelectedValue

End Sub
End Class

Michael.

Hi there,

As you (seem to have) found out, the control ID can't start with a number. The control name used in the book is lstPreferredTheme with an l from list and not a 1 from first.

Then this code is incorrect:

You're trying to get the SelectedValue from the cookie (PreferredTheme) while you should get it from the DropDownList (lstPreferredTheme).

Hope this helps,

Imar

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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
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