Not allowing user to resubmit the same page again.

[hi2Kamal]

I have a problem. I have developed a page which inserts data into database and redirects me to some other page. but when user click the back button from top its takes him to the last page and all the details are resubmitted if user pressess submit button.

does any body have idea how to stop user from re-submitting the last page or expire the last page so that details is inserted only once.

[prabunewindia]

hi friend,
did u try with ViewState property?
initially it is set to true. you can make it as false. so the data will be erased when it redirected to other page
try and reply(i am not having exp in it. theory i know)
prabu

I have a problem. I have developed a page which inserts data into database and redirects me to some other page. but when user click the back button from top its takes him to the last page and all the details are resubmitted if user pressess submit button.

does any body have idea how to stop user from re-submitting the last page or expire the last page so that details is inserted only once.

[dip_developer]

I have a problem. I have developed a page which inserts data into database and redirects me to some other page. but when user click the back button from top its takes him to the last page and all the details are resubmitted if user pressess submit button.

does any body have idea how to stop user from re-submitting the last page or expire the last page so that details is inserted only once.

There are many ways to do that...

1.You can check in the Page_Load event for PostBack. If the page is Posted back then Disable the SUBMIT button(you must have one).

 If Not Page.IsPostBack Then 
btnSubmit.Enable=True
else
btnSubmit.Enable=False
End If
 

2.You can also change the text of SUBMIT button to "UPDATE".You can run a UPDATE query if button text is "UPDATE".

 If Not Page.IsPostBack Then 
btnSubmit.Text="SUBMIT"
else
btnSubmit.Enable="UPDATE"
End If
 

3.Finally you can always check for a duplicate entry by Unique Primary Key (or by some sql) in your table.

[Frinavale]

Hi there!
Dip_developer suggestions are great and could solve the problem for you but please remember that when the user hits the back button a Cached version of your web page is displayed. This means that the user will have to submit the forum and you'll have to do some checking to see if they have already submitted that data.

I recommend using JavaScript to disable the button upon submitting the page.
All you have to do is:

BTN_Button.Attributes.Add("onclick", "javascript:" + BTN_Button.ClientID + ".disabled=true;"

Now when the user clicks the button the page is submitted to the server and the button is disabled. If you need to redisplay the page with errors the JavaScript will also be reset so the button will become usable at that time. Otherwise, if the user clicks the back button the Chached web page displayed will have the button disabled.

Please remember that there are ways around JavaScript scripts, so always do server side checks to properly secure your program.

:)

Cheers!

-Frinny

[Frinavale]

Oh I forgot to mention that if you use that JavaScript suggestion you will have to set the button's UseSubmitBehaviour to be false.

:)

-Frinny