Hi connelly,
Your problem has a straightforward solution.
Simply use getParameter(<name>) to obtain the value of username and
passsword fields in your HTML and then run through the validation
logic.
manoj
>From: connelly <[EMAIL PROTECTED]>
>Reply-To: "A mailing list for discussion about Sun Microsystem's Java
> Servlet API Technology." <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Fwd: Re: passing valuees from javascript to servlets
>Date: Wed, 17 Nov 1999 11:57:38 -0700
>
>Given the information that was passed back and forth on this conversation,
>I
>have a question for you guys.
>
>I am working on a project where I need to do some validation against a
>database with the "username and password". Since they will be inputing
>this
>in on the html side and I need to do validation on the Servlet side, would
>I be
>doing the same thing(or something similar)? I understand how to pass it
>back
>now but how would this work on TextFields or would I shoot the data back
>to the servlet on the "onClick" of the Login button?
>
>Any suggestion you would have would be greatly appreciated.
>
>Jeremiah
>
>
>On Tue, 16 Nov 1999, you wrote:
> > But how do I pass the parameter 'category' to the ServletB as a variable
>in
> > the following as suggested by you.
> >
> > <tr><td>
> > <a href="/servletB?category=xxxxx">yyyyy</a>
> > </td></tr>
> >
> > That is what I am finding tricky to do.
> >
> > Manoj
> >
> >
> > >From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
> > >Reply-To: "A mailing list for discussion about Sun Microsystem's Java
> > > Servlet API Technology." <[EMAIL PROTECTED]>
> > >To: [EMAIL PROTECTED]
> > >Subject: Re: passing valuees from javascript to servlets
> > >Date: Tue, 16 Nov 1999 08:20:49 -0800
> > >
> > >manoj kumar wrote:
> > >
> > > > Hi Andras/Pradeep,
> > > >
> > > > Thanks for the help.
> > > > My problem is a little bit more complicated.
> > > > I am able to pass values from a HTML element to a Servlet.
> > > > My problem is that based on that value I want to fire a query on a
> > >table.
> > > > Let me further expalin the problem.
> > > > Upon clicking a HTML link(or button), a servlet is called(A), which
> > >fires a
> > > > select query on a table
> > > >
> > > > select category_description from category_master
> > > >
> > > > The result of this query is formatted into an html page and sent
>back
> > > > to browser.Now the user selects a particular category and presses
> > > > submit/next(whatever).This results in a call to another servlet(B)
>or
> > > > the same servlet(A,how..?) which in turn fires another query
> > > >
> > >
> > >You don't need JavaScript to do this, although you could use it for
>some
> > >fancier user interface effects.
> > >
> > >The simplest approach:
> > >
> > >* Change the above query to something that selects the
> > > key as well as the description:
> > >
> > > select category_code, category_description
> > > from category_master
> > >
> > >* In servlet A (the one that does the query above), create
> > > an HTML table with one row per category. The table will
> > > show the descriptions in a column.
> > >
> > >* For each category description, create a hyperlink to your
> > > second servlet, passing the category code as a query
> > > parameter. You'll end up with something like this:
> > >
> > > <tr><td>
> > > <a href="/servletB?category=xxxxx">yyyyy</a>
> > > </td></tr>
> > >
> > > where "/servletB" is the URL of your second servlet,
> > > xxxxx is the category code for this row, and yyyyy is
> > > the category description for this row.
> > >
> > >* The user sees a list of hyperlinks. When he or she clicks
> > > one, it calls servlet B and passes the category code of the
> > > selected category. In servlet B, you can retrieve this with:
> > >
> > > String category = request.getParameter("category");
> > >
> > >* Use this to dynamically construct your second SQL statement.
> > >
> > > >
> > > > select product_name from product_master where category_code=xxxxxx
> > > > This 'xxxxxxx' is something which should correspond to the category
> > >selected
> > > > by the user in the previously generated html page(by servlet A).
> > > > I was thinking of making it possible through javascript but couldn't
> > >find a
> > > > solution.
> > > >
> > >
> > >You could use a similar approach to the above to create, for example, a
> > ><select> element for the categories instead of a list. If you add an
> > >"onchange" JavaScript event handler, you could even have it submit the
> > >request
> > >immediately, without waiting for another button to be pressed. See one
>of
> > >the
> > >many web sites focused on JavaScript for details of how to do this.
> > >
> > > >
> > > > hope this clears the idea.
> > > >
> > > > help is immidiately needed.
> > > >
> > > > thanks
> > > >
> > > > manoj
> > > >
> > >
> > >Craig McClanahan
> > >
> >
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