Hi, Here is the script, the ELSE routine of Action EDIT gets execute, when I click on EDIT button this Action does not get excuted the form shows up empty with $ordered as null, I can't get to Action UPDATE because it comes after Action EDIT. 
#!/usr/local/bin/perl
use strict;
use CGI;
use CGI::Carp 'fatalsToBrowser'; #remove for prod
use DBI;

# get form parameters
my $q = new CGI;
my $action = $q->param('go');
my $orderid = $q->param('orderid');
my $msg = "";
my $dbh = dbh(); # connect to db

$dbh->do("SET search_path to northwind") or die;

my $sql = 'SELECT  
             a."OrderID", b."ProductName", a."UnitPrice", a."Quantity"
+, a."Discount"  
           FROM  
             "Order_Details" a, "Products" b  
           WHERE 
             a."ProductID" = b."ProductID" AND "OrderID" = ? ';

my $hr = $dbh->selectrow_hashref($sql,undef,$orderid);

#change validation to suit
if ( ($action eq "UPDATE") && ($orderid =~ /\d+/)) {
  my $sql = qq! UPDATE
                   "Order_Details"
                SET
                   "UnitPrice" = ?,
                   "Quantity"  = ?,
                   "Discount"  = ?
                WHERE "OrderID" = ? !;
               
  my $count = $dbh->do( $sql,undef,$orderid );
  $msg = "$count Record updated - $sql, $orderid";
} else {
  $msg = "Please complete form";
}

# build html page
my $style = q!
  body { background-color: pink ; color: #3300cc; }
  .container { width: 500px; clear: both; }
  .container input { width: 100%; clear: both;}
!;

# Send out the header and form
print $q->header;
print $q->start_html(-title=>'Order details',
                     -style=>{ -code=>$style } );

if ( ($action eq "EDIT") && ($orderid =~ /\d+/)) {
 print qq!<h1 style="color:3300CC">Update Order Details for order # ? 
+</h1>!;
 print qq!<div class="container">
<form action="" method="post">
<input type="hidden" name="ordid" value="$hr->{'OrderID'}"/>
Product Name :<input name="productname" value="$hr->{'ProductName'}" r
+eadonly/><br/>
Unit Price :<input name="unitprice" value="$hr->{'UnitPrice'}" /><br/>
Quantity :<input name="quantity" value="$hr->{'Quantity'}" /><br/>
Discount :<input name="discount" value="$hr->{'Discount'}" /><br/>
<input type="submit" name="go" value="UPDATE"/>
</form></div><hr/>!;
$msg = "";
} else {
print qq!<h1 style="color:3300CC">Order Details for order # $orderid</
+h1>!;
print qq!<div class="container">

<form action="" method="post">
<input type="hidden" name="ordid" value="$hr->{'OrderID'}"/>
Product Name :<input name="productname" value="$hr->{'ProductName'}" r
+eadonly/><br/>
Unit Price :<input name="unitprice" value="$hr->{'UnitPrice'}" readonl
+y/><br/>
Quantity :<input name="quantity" value="$hr->{'Quantity'}" readonly/><
+br/>
Discount :<input name="discount" value="$hr->{'Discount'}" readonly/><
+br/>
<input type="submit" name="go" value="EDIT"/>
</form></div><hr/>!;

$msg = "Record details fetched - $sql, $orderid";
}
 
  # Standard links to the rest of the application
  print <<"FOOTER";
<b>$msg</b>
<hr/>
Jump to - <a href="viewemp.pl">View Employees Listing</a><br/>
Jump to - <a href="addemp.pl">Add an Employee</a><br/>
Jump to - <a href="editemp.pl">Edit an Employee details</a><br/>
Jump to - <a href="updatephoto.pl">Add or update Employee Photo</a><br
+/>
<hr/>
Edited by Terry on July, 06 2014.
FOOTER
print $q->end_html;

# connect to database
sub dbh {
  my $dsn = 'DBI:Pg:dbname=northwind;host=localhost';
  my $user = 'postgres';
  my $pwd  = 'postgres';
  my $dbh = DBI -> connect($dsn,$user,$pwd,{'RaiseError' => 1});
  return $dbh;
}

[download]

In reply to Re^2: How to retain a value passed from another link to a script by terrykhatri
in thread How to retain a value passed from another link to a script by terrykhatri

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.