.Net之随机时间生成器

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DateTime d1 = DateTime.Parse("2010-12-14 00:00:20");
        DateTime d2 = DateTime.Parse("2010-12-15 00:00:10");

        ArrayList kk = getRandomtimes(d1, d2, 300);
        foreach (DateTime d in kk)
        {
            Response.Write(d.ToString() + "<br/>");
        }

    }
    /// <summary>
    /// 获得一个时间段内的随机时间的集合，时间按从小到大排列
    /// </summary>
    /// <param name="t1">第一个时间</param>
    /// <param name="t2">第二个时间</param>
    /// <param name="n">要获得的随机数个数</param>
    /// <returns>DateTime类型的集合</returns>
    public ArrayList getRandomtimes(DateTime t1, DateTime t2, int n)
    {
        double tt1 = t1.Ticks;
        double tt2 = t2.Ticks;
        DateTime tbs = tt1 < tt2 ? t1 : t2;//较小时间的刻度数

        Int32[] tArr = timeDiff(t1, t2, n);//求间隔秒数
        //Int32[] seeds = BubbleSort(tArr); //返回排序后数组
        Int32[] seeds = tArr;
        ArrayList result = new ArrayList();
        DateTime dt = new DateTime();
        for (int i = 0; i < seeds.Length; i++)
        {
            double sd = Convert.ToDouble(seeds[i]);

            dt = tbs.AddSeconds(sd);//在基时间上加上时间种子（秒）
            result.Add(dt);
        }
        result.Sort();//排序
        return result;
    }

    /// <summary>
    /// 获得一组随机、不重复的时间间隔的秒数差值，最大时间间隔不超过10年
    /// </summary>
    /// <param name="t1">第一个时间</param>
    /// <param name="t2">第二个时间</param>
    /// <param name="n">要获得的随机数个数</param>
    /// <returns></returns>
    public Int32[] timeDiff(DateTime t1, DateTime t2, int n)
    {
        int i = 0, tmp;
        Random rd = new Random();
        Int32[] Numbs = new Int32[n];
        long ls = Math.Abs(t1.Ticks - t2.Ticks);//刻度数差值的绝对值
        System.TimeSpan ts = new TimeSpan(ls);
        int tss = Convert.ToInt32(ts.TotalSeconds);//时间跨度的秒数
        if (tss > n && tss < 315532801)//跨度秒数大于随机数个数才能确保获得n个不重复随机数；315532800为10年跨度秒数
        {
            while (i < n)
            {
                Numbs[i] = rd.Next(tss);
                tmp = Numbs[i];
                if (i == 0)
                { i = 1; }//从第二个数开始做不重复处理，跳过第一个随机数
                else
                {
                    for (int k = 0; k < i; k++)
                    {
                        if (tmp != Numbs[k])
                            tmp = 0;//做标记
                    }
                    if (tmp == 0)
                    {
                        i++;//当无重复是i才增1,否则Numbs[i]重复赋值
                    }
                }
            }
            return Numbs;
        }
        else
        {
            Response.Write("<script>alert('时间跨度有误！！！')</script>");
            Int32[] empt = { };
            return empt;//否则返回空数组
        }

    }
}