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Version Q1 2012 released 04/11/2012
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ComboBox / Client-side Events

Logged events
Clear log Event log:

  • Client-side events exposed by RadComboBox:

    • OnClientSelectedIndexChanging
    • OnClientSelectedIndexChanged
    • OnClientDropDownClosing
    • OnClientDropDownOpening
    • OnClientItemsRequested
    • OnClientItemsRequesting
    • OnClientItemBlur
    • OnClientFocus
    • OnClientKeyPressing
    • OnClientItemChecking
    • OnClientItemChecked
    • OnClientCallBackError

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.ComboboxExamplesCS.ClientEvents.DefaultCS"
        Language="c#" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <qsf:HeadTag ID="Headtag1" runat="server" />
        <link rel="stylesheet" type="text/css" href="styles.css" />
    </head>
    <body class="BODY">
        <form id="mainForm" method="post" runat="server">
        <qsf:Header ID="Header1" runat="server" NavigationLanguage="C#" />
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server">
            <qsf:ConfiguratorPanel runat="server" ID="ConfigurationPanel1" Title="Logged events"
                Expanded="true">
                <ul style="margin-left: 0; border-left: none">
                    <li>
    <asp:CheckBox ID="DropDownOpening" runat="server" Text="OnClientDropDownOpening"
    AutoPostBack="True" Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="DropDownOpened" runat="server" Text="OnClientDropDownOpened" AutoPostBack="True"
    Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="DropDownClosing" runat="server" Text="OnClientDropDownClosing"
    AutoPostBack="True" Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="DropDownClosed" runat="server" Text="OnClientDropDownClosed" AutoPostBack="True"
    Checked="True" />
                    </li>
                </ul>
                <ul>
                    <li>
    <asp:CheckBox ID="SelectedIndexChanging" runat="server" Text="OnClientSelectedIndexChanging"
    AutoPostBack="True" Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="SelectedIndexChanged" runat="server" Text="OnClientSelectedIndexChanged"
    AutoPostBack="True" Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="ItemsRequesting" runat="server" Text="OnClientItemsRequesting"
    AutoPostBack="True" Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="ItemsRequested" runat="server" Text="OnClientItemsRequested" AutoPostBack="True"
    Checked="True" />
                    </li>
                </ul>
                <ul>
                    <li>
    <asp:CheckBox ID="KeyPressing" runat="server" Text="OnClientKeyPressing" AutoPostBack="True"
    Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="TextChange" runat="server" Text="OnClientTextChange" AutoPostBack="True"
    Checked="True" />
                    </li>
                    <li>
    <asp:CheckBox ID="ItemChecking" runat="server" Text="OnClientItemChecking" AutoPostBack="True"
    Checked="false" />
                    </li>
                    <li>
    <asp:CheckBox ID="ItemChecked" runat="server" Text="OnClientItemChecked" AutoPostBack="True"
    Checked="false" />
                    </li>
                </ul>
            </qsf:ConfiguratorPanel>
            <div>
    <asp:CheckBox ID="SimpleRenderingMode" Text="Simple Rendering Mode" runat="server"
    AutoPostBack="true" Style="margin-left: 358px" />
            </div>
            <telerik:RadComboBox ID="RadComboBox1" runat="server" Height="170px" Width="204px"
                ShowMoreResultsBox="True" EnableLoadOnDemand="True" OnItemsRequested="RadComboBox1_ItemsRequested"
                Style="margin: 20px auto; display: block !important;" />
        </telerik:RadAjaxPanel>
        <qsf:EventLogConsole runat="server" AllowClear="true" />
        <script type="text/javascript">
            function onDropDownOpening(sender) {
                logEvent("Drop Down opening");
            }

            function onDropDownOpened(sender) {
                logEvent("Drop Down opened");
            }

            function onDropDownClosing(sender) {
                logEvent("Drop Down closing");
            }

            function onDropDownClosed(sender) {
                logEvent("Drop Down closed");
            }

            function onSelectedIndexChanging(sender, eventArgs) {
                var selectedItem = sender.get_selectedItem();
                var previouslySelectedItemText = selectedItem != null ? selectedItem.get_text() : sender.get_text();

                logEvent("Index changing from Item '" + previouslySelectedItemText + "'");
            }

            function onSelectedIndexChanged(sender, eventArgs) {
                var selectedItem = eventArgs.get_item();
                var selectedItemText = selectedItem != null ? selectedItem.get_text() : sender.get_text();

                logEvent("Index changed to Item '" + selectedItemText + "'");
            }

            function onItemsRequesting(sender, eventArgs) {
                logEvent("Requesting Items with text '" + eventArgs.get_text() + "'");
            }

            function onItemsRequested(sender, eventArgs) {
                logEvent("Requested items with text '" + eventArgs.get_text() + "'");
            }

            function onKeyPressing(sender, eventArgs) {
                logEvent("Pressing key code: " + eventArgs.get_domEvent().keyCode);
            }

            function onTextChange(sender) {
                logEvent("Text changed to: " + sender.get_text());
            }

            function onItemChecking(sender, args) {
                var checked = args.get_item().get_checked();
                if (checked == true)
                    logEvent("Item checking");
                else
                    logEvent("Item unchecking");

            }

            function onItemChecked(sender, args) {
                var checked = args.get_item().get_checked();
                if (checked == true)
                    logEvent("Item checked");
                else
                    logEvent("Item unchecked");
            }
        </script>
        <qsf:Footer runat="server" ID="Footer1" />
        </form>
    </body>
    </html>

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