New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

DayRender Event

Server Mode Calendar

December 2024
December 2024
 SMTWTFS
4824252627282930
49Test234567
50891011121314
5115161718192021
5222232425262728
532930311234

Client Mode Calendar

December 2024
December 2024
 SMTWTFS
4824252627282930
491234567
50891011121314
5115161718192021
5222232425262728
532930311234
  • Demo Configurator
  • Selected date:1
    Selected day color:Orange

The example demonstrates how to customize a day in the ASP.NET AJAX Calendar - its background color and text content using the client- and server-side DayRender event.

The server-side DayRender event is fired after the generation of every calendar cell object and just before it gets rendered to the client. It is the last place where changes to the already constructed calendar cells can be made.

The client-side DayRender event is fired for every calendar day cell when the calendar is rendered as a result of client-side navigation. This event can be used to apply final changes to the output (content and visual styles) just before the content is displayed.

The demo illustrates how to utilize the DayRender server and client events of RadCalendar to customize the appearance of the rendered date. Note that in order to apply changes purely client-side attaching the DayRender client event, you need to navigate to a different month and thus force the calendar to re-render itself.
  • DefaultVB.aspx
  • DefaultVB.aspx.vb
  • scripts.js
<%@ Page CodeFile="DefaultVB.aspx.vb" Language="vb" AutoEventWireup="false" Inherits="Telerik.Web.Examples.Calendar.Programming.DayRenderEvent.DefaultVB" %>


<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <script src="scripts.js"></script>
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
       <script type="text/javascript">
           function pageLoad() {
               demo.initialize($get("<%= DatesList.ClientID %>"), $get("<%= ColorList.ClientID %>"), $get("<%= DayString.ClientID %>"));

           }
        </script>
    </telerik:RadCodeBlock>
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="ConfiguratorPanel1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadCalendar1" LoadingPanelID="RadAjaxLoadingPanel1"></telerik:AjaxUpdatedControl>
                </UpdatedControls>
            </telerik:AjaxSetting>
            <telerik:AjaxSetting AjaxControlID="RadCalendar1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadCalendar1" LoadingPanelID="RadAjaxLoadingPanel1"></telerik:AjaxUpdatedControl>
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
    </telerik:RadAjaxLoadingPanel>
    <div id="Div1" class="demo-containers" runat="server">
        <div class="demo-container" runat="server" id="Div2">
            <div class="demo-container no-bg" style="max-width: 350px; padding-right: 20px">
                 <h3>Server Mode Calendar</h3>
                <telerik:RadCalendar RenderMode="Lightweight" ID="RadCalendar1" runat="server" TitleFormat="MMMM yyyy" AutoPostBack="true"
                    OnDayRender="CustomizeDay">
                </telerik:RadCalendar>
            </div>
            <div class="demo-container no-bg" style="max-width: 350px; padding-right: 20px">
                <h3>Client Mode Calendar</h3>
                
                <telerik:RadCalendar RenderMode="Lightweight" ID="RadCalendar2" runat="server" TitleFormat="MMMM yyyy" AutoPostBack="false">
                    <ClientEvents OnDayRender="demo.OnDayRender"></ClientEvents>
                </telerik:RadCalendar>   
            </div>
        </div>
    </div>

    <qsf:ConfiguratorPanel ID="ConfiguratorPanel1" runat="server"
        Expanded="true">
        <Views>
            <qsf:View>
                <qsf:ConfiguratorColumn ID="ConfiguratorColumn1" runat="server">
                    <ul class="fb-group">
                        <li>
                            <qsf:DropDownList ID="DatesList" Label="Selected date:" runat="server" Size="Medium">
                                <Items>
                                    <telerik:DropDownListItem Value="1" Text="1"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="2" Text="2"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="3" Text="3"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="4" Text="4"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="5" Text="5"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="6" Text="6"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="7" Text="7"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="8" Text="8"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="9" Text="9"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="10" Text="10"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="11" Text="11"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="12" Text="12"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="13" Text="13"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="14" Text="14"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="15" Text="15"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="16" Text="16"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="17" Text="17"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="18" Text="18"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="19" Text="19"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="20" Text="20"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="21" Text="21"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="22" Text="22"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="23" Text="23"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="24" Text="24"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="25" Text="25"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="26" Text="26"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="27" Text="27"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="28" Text="28"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="29" Text="29"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="30" Text="30"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="31" Text="31"></telerik:DropDownListItem>
                                </Items>
                            </qsf:DropDownList>
                             <qsf:DropDownList ID="ColorList" runat="server" Label=" Selected day color:" Size="Medium">
                                <Items>
                                    <telerik:DropDownListItem Value="White" Text="White"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Yellow" Text="Yellow"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Orange" Selected="True" Text="Orange"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Pink" Text="Pink"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Magenta" Text="Magenta"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Red" Text="Red"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Purple" Text="Purple"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Blue" Text="Blue"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Cyan" Text="Cyan"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Green" Text="Green"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Grey" Text="Grey"></telerik:DropDownListItem>
                                    <telerik:DropDownListItem Value="Brown" Text="Brown"></telerik:DropDownListItem>
                                </Items>
                            </qsf:DropDownList>
                        </li>
                        <li>
                            <qsf:TextBox ID="DayString" Label="Selected day text:" runat="server" Size="Auto" Text="Test"></qsf:TextBox>
                        </li>
                        <li>
                            <qsf:Button runat="server" ID="Button1"
                                Text="Apply on server">
                            </qsf:Button>
                        </li>
                         <li>
                            <qsf:Button ID="button2" runat="server" Text="Apply on client" OnClientClicked="demo.navigateCalendar" AutoPostBack="false">
                            </qsf:Button>
                        </li>
                    </ul>
                </qsf:ConfiguratorColumn>
                
            </qsf:View>
        </Views>
    </qsf:ConfiguratorPanel>
    </form>
</body>
</html>

Support & Learning Resources

Find Assistance