Wrox Programmer Forums
Go Back   Wrox Programmer Forums > ASP.NET and ASP > ASP.NET 2.0 > ASP.NET 2.0 Professional
ASP.NET 2.0 Professional If you are an experienced ASP.NET programmer, this is the forum for your 2.0 questions. Please also see the Visual Web Developer 2005 forum.
Welcome to the p2p.wrox.com Forums.

You are currently viewing the ASP.NET 2.0 Professional section of the Wrox Programmer to Programmer discussions. This is a community of software programmers and website developers including Wrox book authors and readers. New member registration was closed in 2019. New posts were shut off and the site was archived into this static format as of October 1, 2020. If you require technical support for a Wrox book please contact http://hub.wiley.com
Old May 18th, 2008, 09:24 PM
Registered User
Join Date: Jan 2005
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Default Dropdown list Manipulation - JScript triggering..

I am creating a ASP.net / VB.net application.

On the ASP.net they will be either typing in the information or using the scroll bar.

When they use the scroll bar it fires the "cboCode_SelectedIndexChanged" = Dropdownlist, but when they type it in and then tab out, it does not fire this code. Any ideas on how to fix this via JScript and samples?

//DropDown List in VB.net
ddlCode.Attributes.Add("onkeypress", "return KeySortDropDownList_onkeypress(this,false)")

// JScript File

function KeySortDropDownList_onkeypress(dropdownlist,caseSe nsitive) {
  // check the keypressBuffer attribute is defined on the dropdownlist
  var undefined;
  if (dropdownlist.keypressBuffer == undefined) {
    dropdownlist.keypressBuffer = '';
  // get the key that was pressed
  var key = String.fromCharCode(window.event.keyCode);
  dropdownlist.keypressBuffer += key;
  if (!caseSensitive) {
    // convert buffer to lowercase
    dropdownlist.keypressBuffer = dropdownlist.keypressBuffer.toLowerCase();
  // find if it is the start of any of the options
  var optionsLength = dropdownlist.options.length;
  for (var n=0; n < optionsLength; n++) {
    var optionText = dropdownlist.options[n].text;
    if (!caseSensitive) {
      optionText = optionText.toLowerCase();
    if (optionText.indexOf(dropdownlist.keypressBuffer,0) == 0) {
      dropdownlist.selectedIndex = n;
      return false; // cancel the default behavior since
                    // we have selected our own value
  // reset initial key to be inline with default behavior
  dropdownlist.keypressBuffer = key;
  return true; // give default behavior

So it is not firing the (cboCode_SelectedIndexChanged).Accept and Award Points Accept as Solution

Similar Threads
Thread Thread Starter Forum Replies Last Post
List box manipulation ayem Visual Studio 2008 0 August 15th, 2008 01:32 AM
Dropdown list maha .NET Framework 2.0 7 April 28th, 2007 12:32 AM
fill dropdown list with items when parent list isaac_cm Pro PHP 1 July 10th, 2006 05:41 AM
HELP WITH DROPDOWN LIST enavas Excel VBA 1 April 6th, 2004 02:08 PM

Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright (c) 2020 John Wiley & Sons, Inc.