Re: Ajax for Credit Card Processing

"milop" wrote in message
news:%23X2gZMUkIHA.1184@TK2MSFTNGP04.phx.gbl...
> Hello.
>
> I have a web app that accepts credit card payments.
>
> I want to use AJAX to do an asynchronous post to the server and process
> the payment. I am using the UpdateProgress control to show a progress
> indicator.
>
> Two questions:
>
> 1) If the user clicks the button more twice will the payment be processed
> twice? I performed a test where I just added text to a lable in the same
> UpdatePanel as the button and the text did not "double up" when I clicked
> the Submit button twice. So it "seems" as though the payment wouldn't be
> process twice. And,

There are a couple of ways to avoid this. One is to set up, as part of your
asynch request, a "code" (GUID is fine) that is sent with the request. You
can avoid double bumps by storing the "code" when the user clicks the button
the first time. You then check for status of that code prior to running the
payment.

I would use the disable as well as this, just in case.

> 2) Is there a way to "Lock" the screen so that the user can't click the
> Submit button more than once (in the event that my assumption in #1 is
> wrong)?

AJAX allows you to use a modal dialog. You can bring it down when the asynch
return is complete. You can also disable the button on click, which is a bit
easier. It depends on whether you want the user to be able to do nothing or
not.

--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA

Subscribe to my blog
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Re: Ajax for Credit Card Processing

Hi Greg. Thanks for the response.

Yes, I want the user to do nothing. Is there a modal dialog "object" as part
of AJAX?


"Cowboy (Gregory A. Beamer)" wrote in
message news:u4KN2cakIHA.5956@TK2MSFTNGP03.phx.gbl...
>
> "milop" wrote in message
> news:%23X2gZMUkIHA.1184@TK2MSFTNGP04.phx.gbl...
>> Hello.
>>
>> I have a web app that accepts credit card payments.
>>
>> I want to use AJAX to do an asynchronous post to the server and process
>> the payment. I am using the UpdateProgress control to show a progress
>> indicator.
>>
>> Two questions:
>>
>> 1) If the user clicks the button more twice will the payment be processed
>> twice? I performed a test where I just added text to a lable in the same
>> UpdatePanel as the button and the text did not "double up" when I clicked
>> the Submit button twice. So it "seems" as though the payment wouldn't be
>> process twice. And,
>
> There are a couple of ways to avoid this. One is to set up, as part of
> your asynch request, a "code" (GUID is fine) that is sent with the
> request. You can avoid double bumps by storing the "code" when the user
> clicks the button the first time. You then check for status of that code
> prior to running the payment.
>
> I would use the disable as well as this, just in case.
>
>> 2) Is there a way to "Lock" the screen so that the user can't click the
>> Submit button more than once (in the event that my assumption in #1 is
>> wrong)?
>
> AJAX allows you to use a modal dialog. You can bring it down when the
> asynch return is complete. You can also disable the button on click, which
> is a bit easier. It depends on whether you want the user to be able to do
> nothing or not.
>
> --
> Gregory A. Beamer
> MVP, MCP: +I, SE, SD, DBA
>
> Subscribe to my blog
> http://gregorybeamer.spaces.live.com/lists/feed.rss
>
> or just read it:
> http://gregorybeamer.spaces.live.com/
>
> *************************************************
> | Think outside the box! |
> *************************************************
>