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  4. Appointment based on Calendar (C#)
File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Appointment" %>



    Untitled Page


    
    

            
                
                    Choose day:
                                                      runat="server" 
                                  OnDayRender="MyCalendar_DayRender" 
                                  OnSelectionChanged="MyCalendar_SelectionChanged">
                    
                
                
                    Choose time:
                                                     runat="server" 
                                 Height="168px" 
                                 Width="136px">
            
    
        
    


File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Appointment : System.Web.UI.Page
{
    protected void MyCalendar_SelectionChanged(object sender, EventArgs e)
    {
        lstTimes.Items.Clear();
        switch (MyCalendar.SelectedDate.DayOfWeek)
        {
            case DayOfWeek.Monday:
                lstTimes.Items.Add("10:00");
                lstTimes.Items.Add("10:30");
                lstTimes.Items.Add("11:00");
                break;
            default:
                lstTimes.Items.Add("10:00");
                lstTimes.Items.Add("10:30");
                lstTimes.Items.Add("11:00");
                lstTimes.Items.Add("11:30");
                lstTimes.Items.Add("12:00");
                lstTimes.Items.Add("12:30");
                break;
        }
    }
    protected void MyCalendar_DayRender(object sender, DayRenderEventArgs e)
    {
        if (e.Day.Date.Day == 28 && e.Day.Date.Month == 2)
        {
            e.Cell.BackColor = System.Drawing.Color.Yellow;
            Label lbl = new Label();
            lbl.Text = "
My Birthday!";
            e.Cell.Controls.Add(lbl);
        }
        if (e.Day.Date.Year > 2000)
        {
            e.Day.IsSelectable = false;
        }
    }
}