AJAX ComboBox And Backspace/Delete key

In AJAX ComboBox after selecting an item , when user hits Backspace or delete key from the keyboard, an exception is raised.The following snippet does it without modifying the Toolkit’s js file. Hope this helps.

<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<script language="javascript" type="text/javascript">
  function pageLoad(sender, args) {
   if (!args.get_isPartialLoad()) {
    var ComboBoxCtrl = $find('ComboBox1');
    var txtVal = ComboBoxCtrl.get_textBoxControl().value;
    var code = ComboBoxCtrl._getKeyboardCode(args);
    if ((txtVal.innerHTML != "") &&
        //(code == Sys.UI.Key.backspace || code == Sys.UI.Key.del) &&
        (ComboBoxCtrl._highlightedIndex == null ))
          ComboBoxCtrl._highlightedIndex = 0;
<ajaxToolkit:ComboBox runat="server" ID="ComboBox1" MaxLength="100" AutoCompleteMode="Suggest">
<asp:ListItem Text="ABCaaa" Value="ABC"></asp:ListItem>
<asp:ListItem Text="XYZbbbb" Value="XYZ"></asp:ListItem>
<asp:Button ID="btnsubmit" runat="server" Text="Add" OnClientClick="" onclick="btnsubmit_Click"/>

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One Response to AJAX ComboBox And Backspace/Delete key

  1. TK says:

    Very useful. Wonder what the commented-out code is for.

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