/// <summary>
/// 生成隨機數(shù)列表
/// </summary>
/// <returns></returns>
public List<int> RDNumber()
{
    List<int> col = new List<int>();
    for (int i = 0; i < 6; i++)
    {
        Random rd = new Random(); // 初始化一個新的 Random 實例
        var a = rd.Next();        // 生成一個隨機數(shù)
        col.Add(a);
    }
    return col;
}

/// <summary>
/// 指定范圍內(nèi)的不重復(fù)隨機數(shù)(要求隨機數(shù)個數(shù)小于隨機數(shù)范圍否則程序會陷入死循環(huán)?？稍谘h(huán)中加入跳出機制)
/// </summary>
/// <param name="Number">隨機數(shù)個數(shù)</param>
/// <param name="minNum">隨機數(shù)下限</param>
/// <param name="maxNum">隨機數(shù)上限</param>
/// <returns></returns>
public List<int> GetRandomArray(int Number, int minNum, int maxNum)
{
    int j;
    List<int> b = new List<int>();
    Random r = new Random();
    for (j = 0; j < Number; j++)
    {
        int i = r.Next(minNum, maxNum + 1);
        if (b.Contains(i))  //是否包含這個數(shù)
        {
            j = j - 1;
        }
        else
        {
            b.Add(i);
        }
    }
    return b;
}

int[] index = new int[15];
for (int i = 0; i < 15; i++)
    index[i] = i;
Random r = new Random();
//用來保存隨機生成的不重復(fù)的10個數(shù)
int[] result = new int[10];
int site = 15;//設(shè)置上限
int id;
for (int j = 0; j < 10; j++)
{
    id = r.Next(1, site - 1);
    //在隨機位置取出一個數(shù)，保存到結(jié)果數(shù)組
    result[j] = index[id];
    //最后一個數(shù)復(fù)制到當前位置
    index[id] = index[site - 1];
    //位置的上限減少一
    site--;
}

/// <summary>
/// 生成單個隨機數(shù)字
/// </summary>
public int createNum(Random random)
{
    int num = random.Next(10);
    return num;
}
/// <summary>
/// 生成單個大寫隨機字母
/// </summary>
public string createBigAbc(Random random)
{
    //A-Z的 ASCII值為65-90
    int num = random.Next(65, 91);
    string abc = Convert.ToChar(num).ToString();
    return abc;
}
/// <summary>
/// 生成單個小寫隨機字母
/// </summary>
public string createSmallAbc(Random random)
{
    //a-z的 ASCII值為97-122
    int num = random.Next(97, 123);
    string abc = Convert.ToChar(num).ToString();
    return abc;
}

/// <summary>
/// 生成隨機字母數(shù)字組合
/// </summary>
/// <returns></returns>
public string GetRandom()
{
    Random random = new Random();
    //創(chuàng)建一個StringBuilder對象存儲密碼
    StringBuilder sb = new StringBuilder();
    //使用for循環(huán)把單個字符填充進StringBuilder對象里面變成14位密碼字符串
    for (int i = 0; i < 14; i++)
    {
        //隨機選擇里面其中的一種字符生成
        switch (random.Next(3))
        {
            case 0:
                //調(diào)用生成生成隨機數(shù)字的方法
                sb.Append(createNum(random));
                break;
            case 1:
                //調(diào)用生成生成隨機小寫字母的方法
                sb.Append(createSmallAbc(random));
                break;
            case 2:
                //調(diào)用生成生成隨機大寫字母的方法
                sb.Append(createBigAbc(random));
                break;
        }
    }
    return sb.ToString();
}