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string[] orders = new string[]{ "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q",
"r", "s", "t", "u", "v", "w", "x", "y", "z"};
--发个SQL SERVER 版本的
declare @sql varchar(6) set @sql=''
select top 6 @sql=@sql+char(number) from master..spt_values
where number between 48 and 57 or number between 97 and 122
and type='p' order by newid()
select @sql
go 10
/*
60xrya
dvs01k
zkbgt6
f4siwr
8gihc9
gw3kdq
hg4q18
ng0p8f
o7dnfa
d1vx9q
*/
private string GetRandomCode()
{
char[] chars = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
string code = string.Empty;
for (int i = 0; i < 4; i++)
{
Random rnd = new Random(GetRandomSeed());
code += chars[rnd.Next(0, 10)].ToString();
}
return code;
}
private int GetRandomSeed()
{
byte[] bytes = new byte[4];
System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider();
rng.GetBytes(bytes);
return BitConverter.ToInt32(bytes, 0);
}