Rating Demystified: Ajax Way, Amazon Way*

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Configuration; 

namespace Rating
{
	/// <summary>
	/// Summary description for image.
	/// </summary>
	public class ajaxRating : System.Web.UI.Page
	{
		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
			try
			{
				
					string p = "Select * from " + ConfigurationSettings.AppSettings["MyPhotos"] + " WHERE id = '" + Convert.ToInt32(Request.QueryString["id"]) + "'";
				
					clsDataAccess myDAR = new clsDataAccess();
					myDAR.openConnection(); 
			
					double myScore = Convert.ToDouble(myDAR.getValue(p,Convert.ToInt32(ConfigurationSettings.AppSettings["ScoreField"])));
					double myRatedBy = Convert.ToInt32(myDAR.getValue(p,Convert.ToInt32(ConfigurationSettings.AppSettings["RatedByField"])));
				
					double myCRating = Convert.ToDouble(Request.QueryString["Rating"]);
				    double myTotalRating =0.0;
					
					if ((Convert.ToInt32(Request.QueryString["Rating"])==1)||(Convert.ToInt32(Request.QueryString["Rating"])==2)||(Convert.ToInt32(Request.QueryString["Rating"])==3)||(Convert.ToInt32(Request.QueryString["Rating"])==4)||(Convert.ToInt32(Request.QueryString["Rating"])==5))
						myTotalRating = (myScore + myCRating)/(myRatedBy+1);
					else
						myTotalRating = (myScore)/(myRatedBy);
				
			
					string myTotalRatingString = "";

					if ((myTotalRating <1)&&(myTotalRating>0))
						myTotalRatingString = ".5";
					else if (myTotalRating ==1.0)
						myTotalRatingString = "1";
					else if ((myTotalRating >1)&&(myTotalRating<2))
						myTotalRatingString = "1.5";
					else if (myTotalRating ==2.0)
						myTotalRatingString = "2";
					else if ((myTotalRating >2)&&(myTotalRating<3))
						myTotalRatingString = "2.5";
					else if (myTotalRating ==3.0)
						myTotalRatingString = "3";
					else if ((myTotalRating >3)&&(myTotalRating<4))
						myTotalRatingString = "3.5";
					else if (myTotalRating ==4.0)
						myTotalRatingString = "4";
					else if ((myTotalRating >4)&&(myTotalRating<5))
						myTotalRatingString = "4.5";
					else if (myTotalRating ==5.0)
						myTotalRatingString = "5";
				
				int RatedBy =0;
				int TRating =0;
				if ((Convert.ToInt32(Request.QueryString["Rating"])==1)||(Convert.ToInt32(Request.QueryString["Rating"])==2)||(Convert.ToInt32(Request.QueryString["Rating"])==3)||(Convert.ToInt32(Request.QueryString["Rating"])==4)||(Convert.ToInt32(Request.QueryString["Rating"])==5))
				{
					RatedBy = Convert.ToInt32(myRatedBy)+1;
					TRating = Convert.ToInt32(myScore)+Convert.ToInt32(Request.QueryString["rating"]);
				}
				else
				{
					RatedBy = Convert.ToInt32(myRatedBy);
					TRating = Convert.ToInt32(myScore);
				}

					string q = "UPDATE " + ConfigurationSettings.AppSettings["MyPhotos"] + " SET Score = '" + TRating + " ' , RatedBy = '" + RatedBy + "' WHERE id = '" + Convert.ToInt32(Request.QueryString["id"]) + "'";
				
					clsDataAccess myDA = new clsDataAccess();
					myDA.openConnection(); 
					myDA.saveData(q);
					myDA.closeConnection(); 


			
				if ((Convert.ToInt32(Request.QueryString["Rating"])==1)||(Convert.ToInt32(Request.QueryString["Rating"])==2)||(Convert.ToInt32(Request.QueryString["Rating"])==3)||(Convert.ToInt32(Request.QueryString["Rating"])==4)||(Convert.ToInt32(Request.QueryString["Rating"])==5))
				{
					Response.Cookies["RatedAjax" + Convert.ToInt32(Request.QueryString["id"])].Value = Request.QueryString["Rating"].ToString();
				}

					Response.Write(myTotalRatingString);
				}
			

			catch (Exception SQLexc)
			{
				Response.Write("Read Failed : " + SQLexc.ToString());
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion
	}
}