号码抽奖系统小问题
本帖最后由 bulls5988 于 2013-12-11 15:04:14 编辑 要做一个号码抽奖的小程序，为不可放回的抽奖(中的号码不会再出现);输入一个数字比如100，放在一张表里一个字段：100 。然后用随机函数把这个100做参数来随机，中一个号码写入一张表里。在表中有的号码就不允许在被抽中了。我想用timer做现在逻辑上有点问题。
private void start_Click(object sender, EventArgs e)
{
//开始抽奖
if (timer1.Enabled == false)
{
timer1.Enabled = true;
}
else
{
//这步应该做判断,数据库中表中是否存在号码，如果有不允许被抽取
//保存抽取结果
luck_update = "insert into zj_hm (zj_number) values
('" + label1.Text + "')";
SqlConnection conn_update = new SqlConnection(my_conn.sql_conn());
SqlCommand cmd_update = new SqlCommand(luck_update, conn_update);
conn_update.Open();
cmd_update.ExecuteNonQuery();
timer1.Enabled = false;
}
}
//计时器Timer
private void timer1_Tick(object sender, EventArgs e)
{
//在表中抽奖号段范围内抽取随机号；开始号码，截至号码
luck = "select * from cj_hdnr";
SqlConnection conn = new SqlConnection(my_conn.sql_conn());
SqlCommand cmd = new SqlCommand(luck,conn);
conn.Open();
SqlDataReader rs = cmd.ExecuteReader();
if(rs.Read())
{
start = Convert.ToInt32(rs["hd_kaishi_haoma"]);
end = Convert.ToInt32(rs["hd_jieshu_haoma"]);
}
conn.Close();
rs.Close();
Random rnd = new Random();
label1.Text = (rnd.Next(start,end)).ToString();
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
RandNum a = new RandNum();
a.UI();
Console.Read();
}
}
public class RandNum
{
public List<int> ExNum { get; set; }//已经抽中的数
public List<int> TotalNum { get; set; }
private int count; //范围
private int SELCOUNT;
private int selCount;//选几个
/// <summary>
///
/// </summary>
/// <param name="ct">大于零的整数</param>
public RandNum()
{
ExNum = new List<int>();
TotalNum = new List<int>();
}
private int GetCurrentCount()
{
lock (this)
{
return selCount;
}
}
private void Run()
{
Random r = new Random();
do
{
int num = 0;
int i = r.Next(TotalNum.Count);
num = TotalNum[i];
ExNum.Add(num);
TotalNum.RemoveAt(i);
System.Threading.Thread.Sleep(10000);//10秒中抽一个出来
Console.WriteLine("\r第{0}个性欲号码已产生:{1}", SELCOUNT - GetCurrentCount()+1, num);
} while (Interlocked.Decrement(ref selCount) > 0);
}
public void UI()
{
while (true)
{
Console.WriteLine("===========YY抽奖程序===========");
Console.WriteLine("请输入要抽奖的总数(从0开始编号)");
string s = Console.ReadLine();
int ct = Convert.ToInt32(s);
if (ct <= 0)
Console.WriteLine("输入大于零的整数");
else
{
Console.WriteLine("请输入要从中选从少个数");
string s1 = Console.ReadLine();
int ct1 = Convert.ToInt32(s1);
if (ct1 <= 0)
Console.WriteLine("输入大于零的整数");
if (ct1 > ct)
Console.WriteLine("输入数目不能大于总数");
else
{
count = ct;
selCount = ct1;
SELCOUNT = ct1;
while (ct-- > 0)
{
TotalNum.Add(ct);
}
break;
}
}
}
//开始计算
Console.WriteLine("开始抽奖...");
Task.Factory.StartNew(Run);
Random r = new Random();
while (true)
{
Console.Write(r.Next(count));
System.Threading.Thread.Sleep(500);
Console.Write("\r");
Console.Write(" \r");
if (GetCurrentCount() <= 0)
{
Console.WriteLine("抽奖结束");
Console.WriteLine("中奖序列为:");
ExNum.ForEach(Console.WriteLine);
break;
}
}
}
}
}
