抽奖概率算法
CSI_Riddle riddle = new CSI_Riddle();
CSI_RiddleAnswer answer = new CSI_RiddleAnswer();
CSI_Luckdraw luckdraw = new CSI_Luckdraw();
static Random Rnd = new Random();
PointLog pointLog = new PointLog();//积分日志
User user = new User();
protected void Page_Load(object sender, EventArgs e)
{
//Query query = new Query();
//query.AddAndFilter("AccountId={0}", CurrentAccount.Id);//此表保存的是AccountId
//user = UserService.Find(query);//总积分表
int Count = answer.GetCount(" IsTrue=1 and U_ID=" + CurrentAccount.UserId);//答对灯谜数
int Num = luckdraw.GetCount(" U_ID=" + CurrentAccount.UserId); //抽奖次数
Result resul = new Result();
JavaScriptSerializer jss = new JavaScriptSerializer();
#region
if (DateTime.Now >= DateTime.Parse("2014-02-24 12:00:00"))//抽台历
{
//转盘 Turntable
List<Prize> Turntable = new List<Prize>{
new Prize{ LuckDrowName="0", Chance=25},
new Prize{ LuckDrowName="2500", Chance=75}};
//是否答对全部所有灯谜，并且台历抽奖开启后是否抽过奖
if (answer.GetCount(" IsTrue=1 and U_ID=" + CurrentAccount.UserId) == riddle.GetCount("") && luckdraw.GetCount(" CreateDate>='2014-02-24 12:00:00' and U_ID=" + CurrentAccount.UserId) <= 0)
{
int TrueCount = luckdraw.GetCount(" Result=0");//中到台历个数
if (TrueCount >= 5)//后五个随机
{
if (TrueCount >= 10)//达到10个后不会抽到台历
{
resul.Prize = "2500";
resul.Angle = AngleNum("2500");
luckdraw.Result = 2500;
luckdraw.U_ID = CurrentAccount.UserId;
luckdraw.CreateDate = DateTime.Now;
luckdraw.Add(luckdraw);
}
else //随机抽五个
{
resul.Prize = name(Turntable);
resul.Angle = AngleNum(resul.Prize);
luckdraw.Result = int.Parse(resul.Prize);
luckdraw.U_ID = CurrentAccount.UserId;
luckdraw.CreateDate = DateTime.Now;
luckdraw.Add(luckdraw);
}
}
else //前五个
{
resul.Prize = "0";
resul.Angle = AngleNum("0");//2月24日12点至2月24日23：59
luckdraw.Result = 0;
luckdraw.U_ID = CurrentAccount.UserId;
luckdraw.CreateDate = DateTime.Now;
luckdraw.Add(luckdraw);
}
}
}
#endregion
else
{
if ((Count - Num) > 0)//是否可以抽奖
{
//转盘 Turntable
List<Prize> Turntable = new List<Prize>{
new Prize{ LuckDrowName="500", Chance=60},
new Prize{ LuckDrowName="1000", Chance=17},
new Prize{ LuckDrowName="1500", Chance=17},
new Prize{ LuckDrowName="2500", Chance=6}};
if (DateTime.Now >= DateTime.Parse("2014-02-24 00:00:00"))
{
resul.Prize = "-1";//没有抽奖机会
resul.Angle = 0;
}
else
{
resul.Prize = name(Turntable);
resul.Angle = AngleNum(resul.Prize);
luckdraw.Result = int.Parse(resul.Prize);
luckdraw.U_ID = CurrentAccount.UserId;
luckdraw.CreateDate = DateTime.Now;
luckdraw.Add(luckdraw);
}
}
else
{
resul.Prize = "-1";//没有抽奖机会
resul.Angle = 0;
}
}
if (resul.Prize != "-1" && resul.Prize != "0" && resul.Prize!=null)
{
try
{
pointLog.Point = int.Parse(resul.Prize);//分数
pointLog.UserId = CurrentAccount.UserId;
pointLog.PointRuleId = 0;//猜灯谜
pointLog.RemarkId = 0;
pointLog.OperatorId = CurrentAccount.UserId;
pointLog.CreateDate = DateTime.Now;
PointLogService.Create(pointLog);//加入日志
CSI_iknowUser iknowuser = new CSI_iknowUser();
object ik = iknowuser.ConvertToModel(iknowuser.GetFieldList(" top 1 *", "AccountId=" + CurrentAccount.UserId).Rows[0]);
//iknowuser = iknowuser.ConvertToModel(iknowuser.GetList(" AccountId=" + CurrentAccount.UserId).Tables[0].Rows[0]);
//if (iknowuser == null)
//{
// iknowuser = iknowuser.ConvertToModel(iknowuser.GetList(" AccountId=" + CurrentAccount.Id).Tables[0].Rows[0]);
//}
if (ik != null)
{
iknowuser = (CSI_iknowUser)ik;
iknowuser.Point += int.Parse(resul.Prize);
iknowuser.Update(iknowuser);//加入总积分
}
}
catch
{
// luckdraw.DeleteUserID(CurrentAccount.UserId);//删除抽奖
resul.Prize = "-2";//出问题了
resul.Angle = 0;
}
}
Response.Write(jss.Serialize(resul));
Response.End();
}
//计算概率
private Prize LuckDrow(List<Prize> Turntable)
{
return (from x in Enumerable.Range(0, 1000000) //最多支100万次骰子
let Prize = Turntable[Rnd.Next(Turntable.Count())]
let Sieve = Rnd.Next(0, 100)
where Sieve < Prize.Chance
select Prize).First();
}
//获取中奖奖品名称
protected string name(List<Prize> Turntable)
{
return LuckDrow(Turntable).LuckDrowName;
}
//获取转盘的角度
protected int AngleNum(string LuckDrowName)
{
bool flage = true;
Random rod = new Random();
int Angle = 0;
//360度 分成九份 每份40度
int[,] arrayList = new int[9, 2] { { 0, 39 }, { 40, 79 }, { 80, 119 }, { 120, 159 }, { 160, 199 }, { 200, 239 }, { 240, 279 }, { 280, 319 }, { 320, 359 } };//定义二维数
switch (LuckDrowName)
{
case "500":
while (flage)
{
Angle = rod.Next(360);
if ((arrayList[1, 0] <= Angle && Angle <= arrayList[1, 1]) || (arrayList[3, 0] <= Angle && Angle <= arrayList[3, 1]) || (arrayList[6, 0] <= Angle && Angle <= arrayList[6, 1]) || (arrayList[8, 0] <= Angle && Angle <= arrayList[8, 1]))
{
flage = false;
}
}
break;
case "1000":
while (flage)
{
Angle = rod.Next(360);
if (arrayList[7, 0] <= Angle && Angle <= arrayList[7, 1])
{
flage = false;
}
}
break;
case "1500":
while (flage)
{
Angle = rod.Next(360);
if (arrayList[0, 0] <= Angle && Angle <= arrayList[0, 1])
{
flage = false;
}
}
break;
case "2500":
while (flage)
{
Angle = rod.Next(360);
if (arrayList[2, 0] <= Angle && Angle <= arrayList[2, 1])
{
flage = false;
}
}
break;
default:
while (flage)
{
Angle = rod.Next(360);
if ((arrayList[4, 0] <= Angle && Angle <= arrayList[4, 1]) || (arrayList[5, 0] <= Angle && Angle <= arrayList[5, 1]))
{
flage = false;
}
}
break;
}
return Angle;
}
}
public class Prize //奖品
{
/// <summary>
/// 奖品名称
/// </summary>
public string LuckDrowName;
/// <summary>
/// 概率
/// </summary>
public int Chance;
}
public class Result //结果
{
#region
private int _angle;
private string _prize;
/// <summary>
/// 角度
/// </summary>
public int Angle
{
set { _angle = value; }
get { return _angle; }
}
/// <summary>
/// 奖项
/// </summary>
public string Prize
{
set { _prize = value; }
get { return _prize; }
}
#endregion Model
}
