Help with asp server side validation and browser back button issue

[nkodali]

Hi,

I am having a signup.asp page where a user enters his details and clicks on subscribe button. I am doing server side validation to check if the user already exists in the database and then allowing him to subscribe using VB script. This subscription will send an email and then redirect to a thank you page once the user is validated. Now my problem is when I hit the browser back button on thankyou.asp page it just flashes the signup.asp page and brings back to the thank you page and in this process another email is sent. Is there any way that I can view the signup.asp page by clicking the browser back button on the thank you page.

Thanks.

[danp129]

Hi,

I am having a signup.asp page where a user enters his details and clicks on subscribe button. I am doing server side validation to check if the user already exists in the database and then allowing him to subscribe using VB script. This subscription will send an email and then redirect to a thank you page once the user is validated. Now my problem is when I hit the browser back button on thankyou.asp page it just flashes the signup.asp page and brings back to the thank you page and in this process another email is sent. Is there any way that I can view the signup.asp page by clicking the browser back button on the thank you page.

Thanks.

Check if they user is already subscribed before e-mailing and redirecting.

[nkodali]

Check if they user is already subscribed before e-mailing and redirecting.

This problem occurs even if the user is subscribing for the first time.

[danp129]

This problem occurs even if the user is subscribing for the first time.

If they hit back in the browser and a new e-mail gets sent then there is not code in place to check if they're already signed up before sending the e-mail and redirecting them again.

[nkodali]

If they hit back in the browser and a new e-mail gets sent then there is not code in place to check if they're already signed up before sending the e-mail and redirecting them again.

They can subcribe even though they already signed up. There are 3 types of news letters and user can choose any type just by selecting using the check box and for every type he selected he gets a different email. There is no necessity to confirm if he is already signed up or not.

[danp129]

Try this http://www.4guysfromrolla.com/webtech/111500-1.shtml

[nkodali]

Try this http://www.4guysfromrolla.com/webtech/111500-1.shtml

Nope i read this article and tried to implement something similar but it didnt work in my case. Also i dont have access to thank you page. I need to set something on my signup page only so that it dosent disappear after flasing.

[danp129]

post your code
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