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Old May 18th, 2008, 09:24 PM
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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


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