随机数 字母 数字

随机数 字母 数字

 //len:随机数长度。beginRange，endRange：为"0123456789abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ"这段字符串的范围

private string GetRandomCharNum(int len, int beginRange, int endRange)
{
    string ret = null;
    string str = @"0123456789abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ";
    var seed = Guid.NewGuid().GetHashCode();
    Random random = new Random(seed);
    for (int i = 0; i < len; i++)
    {
        ret += str.Substring(beginRange + random.Next(endRange), 1);
    }
    return ret;
}