Thought of the Day Web Part

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using Microsoft.SharePoint.Utilities;


namespace TOTD.VisualWebPart1
{
    public partial class VisualWebPart1UserControl : UserControl
    {
        //Design by Lalith Gallage 
        protected void Page_Load(object sender, EventArgs e)
        {
            SPWeb oWebsite = SPContext.Current.Web;
            SPList oList = oWebsite.Lists["QOTD"];
            SPListItemCollection collItem = oList.GetItems("Thought", "AuthorImage", "AuthorName");
            Random random = new Random();
            int RndItem = random.Next(1, collItem.Count+1);

            int LastDay = 0;
            int TOTD = 0;

            int CurrentDay = DateTime.Now.DayOfYear; 
            try
            {
                
                LastDay = int.Parse(Application["LastDay"].ToString());
                TOTD = int.Parse(Application["TOTD"].ToString());
                if (LastDay != CurrentDay)
                {
                    Application["LastDay"] = CurrentDay;
                    Application["TOTD"] = RndItem;

                    SPListItem oItem = collItem[RndItem-1];
                    this.ImgAuthor.ImageUrl = SPEncode.HtmlEncode(oItem["AuthorImage"].ToString().TrimEnd('?', '.', ',', ' '));
                    this.lblTOTD.Text = oItem["Thought"].ToString();
                    this.lblAuthor.Text = SPEncode.HtmlEncode(oItem["AuthorName"].ToString());
                }
                else
                {
                    SPListItem oItem = collItem[TOTD-1];
                    this.ImgAuthor.ImageUrl = SPEncode.HtmlEncode(oItem["AuthorImage"].ToString().TrimEnd('?', '.', ',', ' '));
                    this.lblTOTD.Text = oItem["Thought"].ToString();
                    this.lblAuthor.Text = SPEncode.HtmlEncode(oItem["AuthorName"].ToString());
                }
                
            }

            catch
            {

                Application["LastDay"] = CurrentDay;
                Application["TOTD"] = RndItem;
                SPListItem oItem = collItem[RndItem - 1];
                this.ImgAuthor.ImageUrl = SPEncode.HtmlEncode(oItem["AuthorImage"].ToString().TrimEnd('?', '.', ',', ' '));
                this.lblTOTD.Text = oItem["Thought"].ToString();
                this.lblAuthor.Text = SPEncode.HtmlEncode(oItem["AuthorName"].ToString());
            }

        }
    }
}