dynamic combo box

Appy16 has asked for the wisdom of the Perl Monks concerning the following question:

I have a drop down list which is currently hard coded with a few options.But i want to populate it through a text file.

E.g. Here the options in my code are Image, Fimage and other and i want to populate it through a text file.

I would like to know whether dynamically populating a combo box through a text file is possible or not, because i have been stuck at this point for some time.

I am posting my script below

#!/usr/bin/perl -w
 
 
  use CGI::Ajax;
  use CGI;

  sub Show_HTML {
  my $html = <<EOT;
  <HTML>
  <HEAD><title>Dynamic combo box</title>
  </HEAD>
  <BODY>

  <script type="text/javascript">
    
    function CheckIsNumeric()
    {
    var AsciiCode = event.keyCode;
    if ((AsciiCode < 48) || (AsciiCode > 57))
        {
            alert('Please enter only numbers.');
            event.cancelBubble = true; 
            event.returnValue = false; 
        }
    }
    
    function display(selector,inputID)
    {
        var selector=document.getElementById(selector);
        var inputID=document.getElementById(inputID);
        if (selector[selector.selectedIndex].value=="Other")
        {
            inputID.style.display= "block";
        }
        else
        {
            inputID.style.display="none";
        }
    }
    
  </script>
  <form name="orderform" method="GET" > 
  <input type="radio" name="pick" value="fun1" checked="checked">Func1
    &nbsp;
    &nbsp;
  <input type="radio" name="pick" value="Fun2" />Func2<br /> 
    <br>
    Enter a number :
    &nbsp;
    &nbsp;
    <input type="text" name="Number" id="myText" size="6" onkeypress =
+"CheckIsNumeric()"/>
    <br>
    <br>
    Enter a value :
    <select name="Function1" id="f1" STYLE="width: 150px" onchange="re
+turn display('f1','b1');">
    <option value="image">Image</option>
    <option value="fimage">fImage</option>
    <option value="Other">other, please specify:</option>
    </select>
    <input type="text" name="box1" id="b1" size="25" style="display: n
+one;">
    <br>
    <br>
    Enter val2 :
    &nbsp;
    &nbsp;
    &nbsp;
    <input type="text" name="box2" id="b2" size="40">
    <br>
    <br>
    <input type="submit" value="   Submit   " />
  </Form>
  <form name = "Log file" method = "POST" Action="http://localhost/~Ab
+c/log.txt">
  Click Here to View the Log file : 
  <input type="submit" value="Log File" /> 
  <br>
  <br>
  <hr>
  <br>
  </Form>
  </BODY>
  </HTML>
EOT
    return $html;
  }
  
  my $cgi = new CGI();
  my $pjx = new CGI::Ajax( 'functions' => \&functions );
  
   print $pjx->build_html($cgi,\&Show_HTML);
   
   $ENV{'REQUEST_METHOD'} =~ tr/a-z/A-Z/;
   if ($ENV{'REQUEST_METHOD'} eq "GET")
   {
           &functions();
   }
   else
   {}
   
   
  sub functions {
   print "Radio Button's Value is : " . $cgi->url_param('pick');
   print "<br>";
   print "Number's Value is : " . $cgi->url_param('Number');
   print "<br>";
   print "box1's Value is : " . $cgi->url_param('b1');
   print "<br>";
   print "box2's Value is : " . $cgi->url_param('b2');
   print "<br>";
   print "<br>";
   my $number = $cgi->url_param('Number');
   my $g1    = $cgi->url_param('b1');
   my $g2  = $cgi->url_param('b2');
   if ($number eq "" || $g2 eq "")
   {
   print "Please enter all the values";
   }
   else
   {
   print "Thank You";
   }
  }
[download]

Kindly Help. Thanx in advance.

Comment on dynamic combo box Download Code

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Re: dynamic combo box
by wfsp (Abbot) on May 05, 2010 at 08:45 UTC

dynamically populating a combo box through a text file

#! /usr/bin/perl

use strict;
use warnings;

use HTML::Template;

my $options_file = q{options.txt};
open my $fh, q{<}, $options_file
  or die qq{cant open *$options_file* to read: $!};

my @options = <$fh>;
chomp @options;

my @sel;
for my $option (@options){
  my ($value, $text) = split(q{ }, $option, 2);
  push @sel, {value => $value, text => $text};
}

my $t = HTML::Template->new(filename => q{template.html});
$t->param(loop => \@sel);
print $t->output;
[download]

Image   image
Fimage  fimage
other   other, please specify
[download]

<!-- cut down version -->

<select name="Function1" id="f1">
<TMPL_LOOP loop>
  <option value="<TMPL_VAR value>"><TMPL_VAR text></option>
</TMPL_LOOP>
</select>
[download]

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