To obtain values from fields in a web page.

Hi Dan,

Thanks for your assistance.

But as regards to my application, I have an existing forte application

which Iam trying to web enable.

To summarize my problem let me just consider the openning window (logon

screen) which I have converted to web page using WindowConverter Class

in the HTMLWindow project (obviously, it is my supplier project). The

functionality of this window class has to just accept the user name and

validate it. If the user name is valid then proceed further else

display an error message. I have a separate validation method for the

user name, which I can utilise to validate the user name typed by the

user on the web page, if Iam browsing or on the window, if Iam directly

running the application.

The widgets on the window are <UserId> and <ProceedButton> with

window attribute names as UserId and ProceedButton respectively.

Now my handle request method goes like this :

-- This method is the entry point from the Internet to my

-- application. It is automatically called when a request

-- from the Web arrives.

response : HTTPResponse = new;

-- Find the page name.

pageName : TextData = new;

pageName.SetValue(request.PageName);

-- Generate response pages.

if pageName.IsEqual('processquery',IgnoreCase=TRUE) then

-- Please note that I have not write any HTML to build my web page.

-- Instead Iam using the WindowConverter Class to convert my existing

-- windows on the fly to web pages during run time.

w : LogonWindow = new;

-- my logon window class

Converter : WindowConverter = new(sourceWindow=w);

Converter.AssignButton(sourceField = w.<ProceedButton>,type =

'submit');

loginURL : TextData = self.CGIURL.Clone(deep=TRUE);

loginURL.Concat('?serviceName=').concat('appweb');

loginURL.Concat('&pageName=PwdPage');

w.<ProceedButton>.HTMLLink = loginURL.value;

-- Proceed button is on my window to which

-- I have associated the above HTMLLink

-- This link does not submit the User Name typed by the

-- User browsing my web page, but this User Name has to

-- come as part of the request from the browser to perform the

-- validation, as Iam not sure about obtaining the User name

-- from the web page.

-- My problem is how to get this user name?

html : HTHtml = new;

head : HTHead = new;

body : HTBody = new;

-- Give the page a title.

head.Add(HTTitle(Text='Application For The Web'));

html.Add(head);

form : HTForm = New();

body.Add(Converter.WindowToForm(Action=self.CGIURL,HTMethod='POST'));

html.Add(body);

response.AssignResponse(html.ConvertToString());

elseif pageName.IsEqual('PwdPage',IgnoreCase=TRUE) then

w : LogonWindow = new;

Conv : WindowConverter = new(sourceWindow=w);

button : PushButton = new();

button = Conv.LoadParameters(request,w.<UserId>);

-- This will fail because the 'Request' has no user Id.

-- Here, the explanation provided in the Forte Web SDK manual for

-- LoadParameters method (method from WindowConverter Class) seems to

-- be inadequate.

If w.UserId <> Nil And w.UserId.Value <> '' And w.UserId.LengthToEnd()

> 0 Then

If SQLsSO.IsValidUserId(w.UserId) Then

--Method to validate the user Name.

w1 : PasswordWindow = new;

Converter : WindowConverter = new(sourceWindow=w1);

Converter.AssignButton(sourceField = w1.<ProceedButton>,type =

'submit');

pwdURL : TextData = self.CGIURL.Clone(deep=TRUE);

pwdURL.Concat('?serviceName=').concat('appweb');

pwdURL.Concat('&pageName=MessagesPage');

-- and here I will have to get the password typed in by the User.

-- once again my same problem?

w1.<ProceedButton>.HTMLLink = pwdURL.value;

html : HTHtml = new;

head : HTHead = new;

body : HTBody = new;

-- Give the page a title.

head.Add(HTTitle(Text='Application For The Web'));

html.Add(head);

form : HTForm = New();

body.Add(Converter.WindowToForm(Action=self.CGIURL,HTMethod='POST'));

html.Add(body);

response.AssignResponse(html.ConvertToString());

Else

-- Generate an exception for unknown page.

..............

..............

..............

..............

..............

.............. and etc.

In your example, you had sighted about the 'Junktxt'. How does it comes

as part of the request from the browser and what is the reference

associated with the submit button?

If you need further clarifications, please write to me. Iam also still

working on it.

Thanks in advance,

Pamella.

You Wrote :

>Hi, Pamella --

>

>It might be easier to help if you could be a little more specific

about

>what went wrong (ie, the problematic code snippet and the resulting

error

>message), or what exactly you were trying to do. In any event, it is

very

>easy in WebEnterprise to pass values up to Forte from web pages. You

can

>embed them in HTML "hidden" tags or they can accompany standard form

>elements.

>For instance, say you have the following HTML code ...

>--

><form method="POST" action="$$FORTE.ExecURL">

><input type="hidden" name="ServiceName" value="TestService">

><input type="hidden" name="TemplateName" value="nextpage.htm">

><input type="hidden" name="hiddenParam" value="dog">

>

><div align="center"><center>

><p>

>Type some junk here: <input type="text" name="junkTxt"

size="20">

></p>

> </center></div>

>

><div align="center"><center>

><p>

><input type="submit" value="Submit" name="submitBtn">

><input type="reset" value="Reset" name="resetBtn">

></p>

> </center></div>

></form>

>-

>

>In addition to what the user types into the text box (junkTxt), say you

want

>to pass "dog" up to Forte as a hidden parameter (hiddenParam) (hey,

done't

>ask me why!). You can retrieve these values up in Forte in the

HandleTag

>method of your scanner service by invoking "FindNameValue" on

>request:HTTPRequest, ie

>

> firstItem:TextData = request.FindNameValue('junkTxt');

> secondItem:TextData = request.FindNameValue('hiddenParam');

>

>firstItem now contains the value of "junkTxt" and secondItem contains

>"dog." You can now do whatever you like with these guys, including

putting

>them in a ResultSet to be displayed on "nextpage.htm"

>

>Hope this helps,

>Dan

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at 2007-6-29 9:20:51 >