In this blog we will know about calendar control DayRender event.

Scenario-1: - If we want to know the current day to be displayed in red color when we run the web form.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Calender_control.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

<asp:Calendar ID="Calendar1" runat="server" ondayrender="Calendar1_DayRender"></asp:Calendar>

</div>

</form>

</body>

</html>

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Drawing;

namespace Calender_control

{

public partial class WebForm1 : System.Web.UI.Page

{

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)

{

if (e.Day.IsToday)

{

e.Cell.BackColor = Color.Red;

//e.Cell.ForeColor = Color.Red;

}

}

}

}

Scenario-2: - Suppose when we click the date in calendar we want message as today date is appointment day or today date is meeting day showing that message in pop screen.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Calender_control._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

<asp:Calendar ID="Calendar1" runat="server" ondayrender="Calendar1_DayRender">

</asp:Calendar>

</div>

</form>

</body>

</html>

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Drawing;

namespace Calender_control

{

public partial class _Default : System.Web.UI.Page

{

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)

{

if (e.Day.DayNumberText.ToString() == "18")

{

e.Cell.Attributes.Add("onclick", "javascript:alert('Today date is meeting day')");

e.Cell.ForeColor = Color.Red;

}

if (e.Day.DayNumberText.ToString() == "20")

{

e.Cell.Attributes.Add("onclick", "javascript:alert('Today date is appointment day')");

e.Cell.ForeColor = Color.Green;

}

}

}

}

Thanks for reading