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ISAPI (button on HTML Page)

olisaac asked
Last Modified: 2010-08-05
I'm creating an ISAPI application

how can I receive the fact that a user has clicked(submit) on a butoon in a HTML PAGE ?

I've to use the TWebActionItem ?

Where I've to put my code to execute the function related to this button ?

Thanks a lot

Watch Question

The following html-code could be a part on a page:

<FORM method=post action="cgi-bin/button.dll/click">
<input type=submit value=Search>

When the button is pressed, the ISAPI gets an action '/click'

In you ISAPI app double-click on the WebModule window. In the appearing window add a new actionitem. Set its PathInfo property to '/click'. Now write the OnAction event.



Hi Olivier,

1. Receiving the fact of button click:
I've always named my buttons in HTML code like:
<INPUT TYPE=submit NAME="LoginBtn" VALUE="Login">

The Delphi code is:
if (Request.ContentFields.Values['LoginBtn'] <> '') then begin
which means that exactly login button has been clicked. (if I have more btns on the page)

2. Using WebActionItems:
  It's recommended to have at least one Action Item with no PathInfo property (empty) and Default = True. That way all requests will be handled here.
  You can use BeforeDispatch event of the WebDispatcher also.
  For more complicated jobs you can use PathInfo after the name of your dll in different html pages to react with different Action Items depending on the PathInfo of the request. {see Epsylon's comment}

3. Where to put code:
  It depends on the answer of the question 2. If you are using different Action Items the code can be in the code of the proper item, in the default item, ih the before or after dispatch events.

Regards, Geo


Adjusted points from 50 to 75



Thanks, it works.

But I have another question (reason for the increase of the points).

When I push the button, in my Delphi code I want to make integrity tests on text box (in the html page too (TITRE In my sample code)).
If the data is not good in this text box. I would that the page HTML don't change to permit to the user to correct his mistake

I've to change the value of the handle in the beforedispatch or afterdispatch function

I don't know if my question is so clear...


Sample of my code :

procedure TWebModule1.WebModuleBeforeDispatch(Sender: TObject;
Request: TWebRequest; Response: TWebResponse; var Handled: Boolean);
  if (Request.ContentFields.Values['ADD'] <> '') then

    if length(Titre1) > 50 then
        MessageDlg('TITRE NOT CORRECT', mtInformation, [mbOk], 0);


Hi geobul, if you answer my second question, the points are for you...
This one is on us!
(Get your first solution completely free - no credit card required)


I will have some other questions for you in a few days...

I will be happy to help !

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