asked on

How do I run some code on the loading of a page (ASP)

I am trying to use cookies and I am new to web page development. My thought is that when the page loads I should check for my cookie and adjust the formatting of the page acordingly. So if a user is loged in certain fields will be availible and some will not. I have figured out the cookie thing mostly but I cant figure out how to get the code to run before a button on the page is clicked. I need to run my statements before the user sees what is on the page - before a button is clicked. Where? How? do I put in the code I need?

Here is a tidbit from the start of my page...

Thank you,

TH

CODE
======================================================================================================

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<script runat="server">

' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
If Request.Cookies("Preferences").HasKeys Then ' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
TextBox_Password.Visible() = False ' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
TextBox_UserName.Visible() = False ' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
End If ' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
' <------------------ need to run this code first !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Sub Button_Submit_Book_Click(ByVal sender As Object, ByVal e As System.EventArgs)

'gather user entry data
Dim strUserName As String
Dim strPassword As String

If Request.Cookies("Preferences").HasKeys() Then

strUserName = Request.Cookies("Preferences")("UserName")
strPassword = Request.Cookies("Preferences")("Password")
End If

If Not Request.Cookies("Preferences").HasKeys Then
strUserName = TextBox_UserName.Text
strPassword = TextBox_Password.Text
End If

Dim strBook_Title As String = TextBox_Book_Title.Text
Dim strBook_Auther As String = TextBox_Book_Author.Text
Dim strBook_ISBN As String = TextBox_Book_ISBN.Text

Dim Flag_account_password_exist As Boolean

Thank you,

ASKER CERTIFIED SOLUTION

Zyloch

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travishaberman

ASKER

That worked Great!!! You are going to get the 250... But I am going to up this to 500 for you if you can do me one better and tell me the syntax to check and see if a cookie exists.. My problem is that my current code checks to see if the cookie has "Keys"

If Request.Cookies("Preferences").HasKeys() Then
...
...

What I want to do is check to see if the cookie is there at all..

any thoughts?
if no.. then I will just accept your last answer..

Thanks!

-TH

Zyloch

Never doubt the power of Google.

You can check

Request.Cookies("Preferences")<>''

if I'm correct, but if you want to check if a Preferences cookie has a certain key, you'd do

Request.Cookies("Preferences")("keyName")<>''

travishaberman

ASKER

hmmm.. that didn't quite do it.. I tried, but it says.. but I get an "expresson expected"

any more thoughts?

Zyloch

Ah, let's see...

(Playing around here since not TOO great at ASP)

If Request.Cookies("Preferences") Is Nothing Then
Cookie Does not Exist

travishaberman

ASKER

That did it!!!

Thank you much,

-TH

Zyloch

No prob, glad to help :)