写了一个抽奖类，感觉还不错，可以适合各种变化

抽奖类:

/// <summary>
/// 抽奖类
/// </summary>
public class Lottery<T>
{
/// <summary>
/// 抽奖次数
/// </summary>
public int LotteryNumber { get; set; }
/// <summary>
/// 抽中事件
/// </summary>
public event EventHandler<LuckyEventArgs<T>> LuckEvent;
/// <summary>
/// 抽失败事件
/// </summary>
public event EventHandler<LuckyErrorEventArgs> LuckErrorEvent;
/// <summary>
/// 外部待要抽奖的清单列表
/// </summary>
private List<T> allList = new List<T>();
/// <summary>
/// 传进来的副本，内部初始化的时候使用
/// </summary>
private List<T> sourceList = new List<T>();
/// <summary>
/// 已中奖的清单列表
/// </summary>
private List<T> luckyList;
/// <summary>
/// 锁
/// </summary>
private object m_lock = new object();
/// <summary>
/// 构造方法
/// </summary>
/// <param name="allList"></param>
public Lottery(List<T> allList)
{
this.init(allList,this.sourceList);
this.allList = allList;
this.luckyList = new List<T>();
}
/// <summary>
/// 初始化要抽奖的数组
/// </summary>
/// <param name="list"></param>
/// <param name="targetList"></param>
private void init(List<T> list,List<T> targetList)
{
for (int i = 0; i < list.Count; i++)
{
targetList.Add(list[i]);
}
}
/// <summary>
/// 获得幸运号
/// </summary>
/// <returns></returns>
public void GetLuckyNumber()
{
lock (m_lock)
{
T obj;
Random r = new Random();
int num = r.Next(allList.Count);
if (this.allList.Count > 0)
{
obj = this.allList[num];
LotteryNumber++;
if (LuckEvent != null)
{
this.LuckEvent(null,new LuckyEventArgs<T>(obj,this.LotteryNumber));
}
//幸运号添加该列表
this.luckyList.Add(obj);
//待抽奖的列表里移除该幸运号
this.allList.Remove(obj);
// return obj;
}
else
{
if (this.LuckErrorEvent != null)
{
this.LuckErrorEvent(null, new LuckyErrorEventArgs("没有可以抽奖的资源！"));
}
}
}

}
/// <summary>
/// 获得幸运列表
/// </summary>
/// <returns></returns>
public List<T> GetLuckyList()
{
return this.luckyList;
}
/// <summary>
/// 重新初始化
/// </summary>
public void Reset()
{
this.allList.Clear();
this.init(this.sourceList, this.allList);
this.LotteryNumber = 0;
this.luckyList.Clear();
}
}
/// <summary>
/// 抽奖成攻事件信息
/// </summary>
/// <typeparam name="T"></typeparam>
public class LuckyEventArgs<T>:EventArgs
{
/// <summary>
/// 被抽中的实体
/// </summary>
public readonly T args;
/// <summary>
/// 第几次抽奖
/// </summary>
public readonly int lotteryNumber;
/// <summary>
/// 抽奖产生的抽中事件
/// </summary>
/// <param name="args">抽中的实体信息</param>
/// <param name="lotteryNumber">抽奖的次数值</param>
public LuckyEventArgs(T args, int lotteryNumber)
{
this.args = args;
this.lotteryNumber = lotteryNumber;
}
}
/// <summary>
/// 抽奖失败事件信息
/// </summary>
public class LuckyErrorEventArgs : EventArgs
{
/// <summary>
/// 抽奖失败的消息
/// </summary>
public readonly string msg;
/// <summary>
/// 抽奖产生的抽奖失败事件
/// </summary>
/// <param name="args"></param>
public LuckyErrorEventArgs(string msg)
{
this.msg = msg;
}

}