2018-03-29 C# 生成随机 ID 号
最编程
2024-05-05 07:31:13
...
/*
*为了方便，我将地区设定在了110000 北京。
地区也是可以随机，但是它的数据集太多，我偷懒没有写，如有兴趣可以自行补上。
*/
class Program
{
//生成随机年份
public static int generateYear()
{
StringBuilder bu = new StringBuilder();
Random rd = new Random();
int year = rd.Next(1900, DateTime.Now.Year);
bu.Append(year);
return int.Parse(bu.ToString());
}
//生成
public static string generate()
{
StringBuilder bu = new StringBuilder();
Random rd = new Random();
bu.Append(110000);
int year = generateYear();
bu.Append(year);
int month = rd.Next(1, 12);
if (month < 10)
{
bu.Append(0);
}
bu.Append(month);
int[] days;
if (isleapyear(year))
{
days =new int[12]{31,29,31,30,31,30,31,31,30,31,30,31};
}
else
{
days = new int[12] { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
}
int day = rd.Next(1, days[month]);
if (day < 10)
{
bu.Append(0);
}
bu.Append(day);
bu.Append(randomcode());
int[] c = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
char[] r = { '1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2' };
string convert = bu.ToString();
int it = 0;
int res =0;
// Console.WriteLine(res);
while (it<17)
{
res = res + (convert[it] - '0') * c[it];
// Console.WriteLine("第"+it+"次,"+convert[it]+"乘以"+c[it]);
// Console.WriteLine(res);
it++;
}
int i = res%11;
bu.Append(r[i]);
return bu.ToString();
}
//生成3位随机
public static string randomcode()
{
StringBuilder bu = new StringBuilder();
Random rd = new Random();
int code = rd.Next(1, 999);
if (code < 10)
{
bu.Append(00);
}else if (code < 100)
{
bu.Append(0);
}
bu.Append(code);
return bu.ToString();
}
public static bool isleapyear(int year)
{
if (year % 4 == 0)
{
if(year % 100 == 0 && year % 400 != 0)
{
return false;
}
return true;
}
return false;
}
static void Main(string[] args)
{
Console.Write(generate());
Console.ReadKey();
}
}
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