Gochas When Using SPCalendarView

Please note that there are a few gotchas when using SPCalendarView in your web part class:

1. Your web part class has to inherit from Microsoft.SharePoint.WebPartPages.WebPart
2. EnableV4Rending of SPCalendarView has to be false otherwise the css class specified in BackgroundColorClassName of SPCalendarItem has no effect
3. BackgroundColorClassName of SPCalendarItem is only applicable if the IsAllDayEvent is set to true
4. There is a bug with SPCalendarView control when EnableV4Rending is set to true, SPCalendarItem stays when switching month, this can be fixed by applying December 2011 SharePoint Foundation CU

using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
 
namespace WebPartTest.MyCalendarWebPart
{
    [ToolboxItemAttribute(false)]
    public class MyCalendarWebPart :  Microsoft.SharePoint.WebPartPages.WebPart
    {
        private SPCalendarView calendar;
 
        protected override void CreateChildControls()
        {
            base.CreateChildControls();
 
            calendar = new SPCalendarView();
            calendar.EnableV4Rendering = false;
            calendar.SelectedDate = GetSelectedDate();
            calendar.EnableViewState = true;
            calendar.ViewType = GetViewType();
            calendar.DataSource = GetCalendarItems();
            calendar.DataBind();
            Controls.Add(calendar);
        }
 
        private SPCalendarItemCollection GetCalendarItems()
        {
            SPCalendarItemCollection items = new SPCalendarItemCollection();
 
            items.Add(new SPCalendarItem(){
                StartDate = DateTime.Now,
                EndDate = DateTime.Now.AddHours(5),
                hasEndDate = true,
                IsAllDayEvent = true,
                Title = "Lunch",
                Location = "KFC",
                CalendarType = Convert.ToInt32(SPCalendarType.Gregorian),
                BackgroundColorClassName = "LunchClass",
                DisplayFormUrl = "www.google.com"
            });
 
            items.Add(new SPCalendarItem()
            {
                StartDate = DateTime.Now.AddDays(1),
                EndDate = DateTime.Now.AddDays(2),
                hasEndDate = true,
                IsAllDayEvent = true,
                Title = "Vacation",
                Location = "Cuba",
                CalendarType = Convert.ToInt32(SPCalendarType.Gregorian),
                BackgroundColorClassName = "VacationClass",
                DisplayFormUrl = "www.microsoft.com"
            });
 
            return items;
        }
 
        private string GetViewType() 
        { 
            string viewType = string.Empty;
            string calendarPeriod = Page.Request.QueryString["CalendarPeriod"];
            if (calendarPeriod != null) 
            {
                switch (calendarPeriod.ToString().ToLower()) 
                { 
                    case "day":                     
                        viewType = "day"; 
                        break; 
                    case "month":                     
                        viewType = "month"; 
                        break; 
                    case "timeline":                     
                        viewType = "timeline"; 
                        break; 
                    default:                     
                        viewType = "week"; 
                        break; }
            }
            else { viewType = "week"; } 
            
            return viewType;
        } 
 
        private string GetSelectedDate()
        {
            string selectedDate = Page.Request.QueryString["date"];
        
            return (selectedDate == null)?String.Empty:selectedDate; 
        }
    }
}