Hi Paul. Just got in (tied up this am).
Agree with everything that Niall said. Just wanted to confirm that you don't
get an error when you actually BUILD Struts? ie you get the error when you try
and use the tag, and check that you have copied the struts-html.tld into your
directory too?
Let me know if you still have probs.
Dave
PS Don't worry about asking the qu's - can all be quite confusing to start
with!!
"Niall Pemberton" <[EMAIL PROTECTED]> on
06/28/2001 11:31:28 PM
Please respond to [EMAIL PROTECTED]
To: [EMAIL PROTECTED],
[EMAIL PROTECTED]
cc: (bcc: David Hay/Lex/Lexmark)
Subject: RE: multiple form fields (I HATE CTRL-S )
Paul,
1) The reason you're getting "null pointer error for the attribute indexed"
is because Dave's tags initialise "indexed" to null - you have to set it to
"true" or "false" in your jsp.
i.e. <html:text name="parameter" property="value" indexed="true"/>
2) You seem to be setting up your data incorrectly in your jsp
Typically an action of yours would run off, get some data and load it into
your ActionForm which then forward to a jsp to display/edit.
I'm not sure why you've got it in your jsp, but anyway what you've done isnt
right - its creating your vector BUT isntead of putting it in your
actionForm, your storing it as a page scope parameter under the name
"ParameterList".
Instead of this:
pageContext.setAttribute("ParameterList", vin, PageContext.PAGE_SCOPE);
You should be doing something like:
salesordercreateForm.setParameterList(vin);
My suggestion too keep it simple, take that stuff out of your jsp and put it
in the constructor of your ActionForm - then you know its always going to be
present (dont have to worry about scope). Anyway as you have it at the
moment youre always going to have any empty vector - so you wont see
anything.
i.e. something like
public class SalesOrderCreateForm extends ActionForm {
public SalesOrderCreateForm() {
parameterList.add(0,new
SapValidParameter("orderitemsin_itmnumber","00010"));
parameterList.add(0,new
SapValidParameter("orderitemsin_material","TEST"));
parameterList.add(0,new
SapValidParameter("orderitemsin_billdate","20000101"));
parameterList.add(0,new
SapValidParameter("orderitemsin_plant","2000"));
parameterList.add(0,new
SapValidParameter("orderitemsin_targetqty","1000"));
parameterList.add(0,new
SapValidParameter("orderitemsin_shorttext","TEST"));
parameterList.add(0,new
SapValidParameter("orderitemsin_reqdate","20000101"));
parameterList.add(0,new
SapValidParameter("orderitemsin_matlgroup","2000"));
parameterList.add(0,new
SapValidParameter("orderitemsin_purchdate","20000101"));
parameterList.add(0,new
SapValidParameter("orderitemsin_currency","USD"));
}
etc. etc.
3) Rama Krishna's (isnt he a Hindu God?) put up a reply for you about Vector
or Vectors (havent done that flavour myself), so if you can get that working
to display your data youre half way there.
Niall
> -----Original Message-----
> From: Paul Beer [mailto:[EMAIL PROTECTED]]
> Sent: 29 June 2001 03:35
> To: Struts-User
> Subject: RE: multiple form fields (I HATE CTRL-S )
>
>
>
>
> OK here's my bad code. There are two problems Im try to resollve here :
>
> 1) i cant iterate through a vector (how do i give the html tag an
> enumerator
> ???)
> 2) even though i rebuilt struts w/tags from husted.com i get a
> null pointer
> error for the attribute "indexed"
>
> i can get iterations to work with simple ine dimensional arrays,
> but what i
> really want to do is input a grid of data as a vector of vectors. so
> basically what is below is only a broken half the implementation i need...
> the other thing i need to know is how to "set" this data in the formBean.
> does this method do it :
>
> public void setParameterList(Vector parameterList)
> {
> this.parameterList = parameterList;
> }
>
> first here's the errors I am trying to get around :
>
> Attribute 'indexed' not found in tag library 'null' for the tag text.
>
>
> I also get no results form the vector iteration below.
>
>
>
> here's the JSP :
>
>
> <html:form>
>
> { java.util.Vector vin = new java.util.Vector();
> vin.add(0,new SapValidParameter("orderitemsin_itmnumber","00010"));
> vin.add(0,new SapValidParameter("orderitemsin_material","TEST"));
> vin.add(0,new SapValidParameter("orderitemsin_billdate","20000101"));
> vin.add(0,new SapValidParameter("orderitemsin_plant","2000"));
> vin.add(0,new SapValidParameter("orderitemsin_targetqty","1000"));
> vin.add(0,new SapValidParameter("orderitemsin_shorttext","TEST"));
> vin.add(0,new SapValidParameter("orderitemsin_reqdate","20000101"));
> vin.add(0,new SapValidParameter("orderitemsin_matlgroup","2000"));
> vin.add(0,new SapValidParameter("orderitemsin_purchdate","20000101"));
> vin.add(0,new SapValidParameter("orderitemsin_currency","USD"));
> pageContext.setAttribute("ParameterList", vin,
> PageContext.PAGE_SCOPE);
> }
>
>
> %>
>
>
> <ol>
> <logic:iterate id="parameter" name="salesordercreateForm"
> property="parameterList">
>
> <html:text name="parameter" property="value" />
>
> </logic:iterate>
> </ol>
>
> </html:form>
>
>
>
>
>
>
> </body>
> </html:html>
>
>
>
>
> here's the form code :
>
> /**
> * The parameter list
> */
> private Vector parameterList = new Vector();
>
>
> /**
> * Return the list of parameters
> */
> public Vector getParameterList()
> {
> return(this.parameterList);
> }
>
> public String getParameters()
> {
> return(this.parameterList.toString());
> }
>
> /**
> * Set the list of parameters
> *
> * @param parameterList The new list
> */
> public void setParameterList(Vector parameterList)
> {
> this.parameterList = parameterList;
> }
>
> /**
> * Get a particular parameter from the parameterList, based on index
> *
> * @param index The index of the parameter to retrieve
> */
> public SapValidParameter getParameter(int index)
> {
> return (SapValidParameter)parameterList.elementAt(index);
>
> }
>
>
> -----Original Message-----
> From: Niall Pemberton [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, June 28, 2001 5:40 PM
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Subject: RE: multiple form fields
>
>
> Hey thats what this list is for - your headaches as valid as anyone elses,
> keep sending them until you get a result.
>
> Post all the bits of code in an email - your action form and/or
> bean(s) and
> the jsp - plus when is throwing the Null pointer exception, - in the jsp,
> before your page is displaying or afterwards when its trying to populate
> back?
>
> Off the top of my head you might be getting null pointer exceptions for a
> couple of reasons:
>
> 1) If its happening before your page is displayed it might be
> because there
> are nulls in your array/collection/vector - make sure its all
> loaded/initialised containing no nulls before you forward to your
> jsp page.
>
> 2) If its happening after you submit your form back (using Daves
> tags) then
> check the scope of your form - if its in session scope you should
> be OK, if
> its in request scope you will need to do something clever to set it up
> again. Struts effectively does a getXxxxx(index).setYxxxx(value) call
>
> Anyway, if you post your code it'll be easier to see whats happening.
>
> You are using Dave's modified tags from husted.com?
>
> Niall
>
> > -----Original Message-----
> > From: Paul Beer [mailto:[EMAIL PROTECTED]]
> > Sent: 29 June 2001 00:56
> > To: [EMAIL PROTECTED]
> > Subject: RE: multiple form fields
> >
> >
> > Im still having problems getting this. I just started using struts so
> > please bear with me here. But can someone please email me
> > something similar
> > to the logic-iterate example that cmoes with the
> example-taglibs demo ? I
> > am getting null pointer errors and I dont if it is my struts
> > distribution or
> > my own inability to grock this....
> >
> > i will try not to toxify this list with any more of this ....
> > its just that
> > if I cant model a formbean w/a grid of data struts is worthless to me,
> > because my whole world is executing functions w/import tables.
> >
> > -paul
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, June 28, 2001 1:54 PM
> > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> > Subject: RE: multiple form fields
> >
> >
> >
> >
> > Paul,
> >
> > a concrete example using modified tag:
> >
> > jsp:
> > <logic:iterate id="parameter" name="ParametersForm"
> > property="parameterList">
> > .................
> > <html:text name="parameter" property="value" indexed="true"
> > onchange="validate(this)"/>
> > .................
> > </logic:iterate>
> >
> >
> > in my form bean (using a vector):
> >
> > public final class ParametersForm extends ActionForm
> > {
> > /**
> > * The parameter list
> > */
> > private Vector parameterList = new Vector();
> >
> >
> > /**
> > * Return the list of parameters
> > */
> > public Vector getParameterList()
> > {
> > return(this.parameterList);
> > }
> >
> > /**
> > * Set the list of parameters
> > *
> > * @param parameterList The new list
> > */
> > public void setParameterList(Vector parameterList)
> > {
> > this.parameterList = parameterList;
> > }
> >
> > /**
> > * Get a particular parameter from the parameterList, based on index
> > *
> > * @param index The index of the parameter to retrieve
> > */
> > public Parameter getParameter(int index)
> > {
> > return (Parameter)parameterList.elementAt(index);
> >
> > }
> > }
> >
> > Hope that helps,
> >
> > Dave
> >
> >
> >
> >
> >
> > "Paul Beer" <[EMAIL PROTECTED]> on 06/28/2001
> > 02:32:55 PM
> >
> > Please respond to [EMAIL PROTECTED];
> > Please
> > respond to [EMAIL PROTECTED]
> >
> > To: [EMAIL PROTECTED]
> > cc: (bcc: David Hay/Lex/Lexmark)
> > Subject: RE: multiple form fields
> >
> >
> >
> > sorry i send the email accidently :
> >
> > doesnt :
> >
> > ...
> > <INPUT type="text" name="qty" value="1">
> > <INPUT type="text" name="qty" value="2">
> > <INPUT type="text" name="qty" value="3">
> > ...
> >
> > In your class:
> >
> > String[] qtys = request.getParameterValues("qty");
> >
> >
> > defeat the purpose of having a form bean which seems like a kind
> > of servlet
> > abstraction of an html form ? i dont really care. I would just
> > like to see
> > some sample code that works. I have searched through the
> quagmire that is
> > the mail archives and every thread ends w/confusing comments.
> >
> > -p
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
