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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
namespace EC
{
/// <summary>
/// 随机函数
/// </summary>
public class RandomObject
{
#region 数字随机数
/// <summary>
/// 数字随机数
/// </summary>
/// <param name=”n”>生成长度</param>
/// <returns></returns>
public static string RandNum(int n)
{
char[] arrChar = new char[] { ’0′, ’1′, ’2′, ’3′, ’4′, ’5′, ’6′, ’7′, ’8′, ’9′ };
StringBuilder num = new StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < n; i++)
{
num.Append(arrChar[rnd.Next(0, 9)].ToString());
}
return num.ToString();
}
#endregion
#region 数字和字母随机数
/// <summary>
/// 数字和字母随机数
/// </summary>
/// <param name=”n”>生成长度</param>
/// <returns></returns>
public static string RandCode(int n)
{
char[] arrChar = new char[]{
‘a’,\'b’,\'d’,\'c’,\'e’,\'f’,\'g’,\'h’,\'i’,\'j’,\'k’,\'l’,\'m’,\'n’,\'p’,\'r’,\'q’,\'s’,\'t’,\'u’,\'v’,\'w’,\'z’,\'y’,\'x’,
’0′,’1′,’2′,’3′,’4′,’5′,’6′,’7′,’8′,’9′,
‘A’,\'B’,\'C’,\'D’,\'E’,\'F’,\'G’,\'H’,\'I’,\'J’,\'K’,\'L’,\'M’,\'N’,\'Q’,\'P’,\'R’,\'T’,\'S’,\'V’,\'U’,\'W’,\'X’,\'Y’,\'Z’
};
StringBuilder num = new StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < n; i++)
{
num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());
}
return num.ToString();
}
#endregion
#region 字母随机数
/// <summary>
/// 字母随机数
/// </summary>
/// <param name=”n”>生成长度</param>
/// <returns></returns>
public static string RandLetter(int n)
{
char[] arrChar = new char[]{
‘a’,\'b’,\'d’,\'c’,\'e’,\'f’,\'g’,\'h’,\'i’,\'j’,\'k’,\'l’,\'m’,\'n’,\'p’,\'r’,\'q’,\'s’,\'t’,\'u’,\'v’,\'w’,\'z’,\'y’,\'x’,
‘_’,
‘A’,\'B’,\'C’,\'D’,\'E’,\'F’,\'G’,\'H’,\'I’,\'J’,\'K’,\'L’,\'M’,\'N’,\'Q’,\'P’,\'R’,\'T’,\'S’,\'V’,\'U’,\'W’,\'X’,\'Y’,\'Z’
};
StringBuilder num = new StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < n; i++)
{
num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());
}
return num.ToString();
}
#endregion
#region 日期随机函数
/// <summary>
/// 日期随机函数
/// </summary>
/// <param name=”ra”>长度</param>
/// <returns></returns>
public static string DateRndName(Random ra)
{
DateTime d = DateTime.Now;
string s = null, y, m, dd, h, mm, ss;
y = d.Year.ToString();
m = d.Month.ToString();
if (m.Length < 2) m = “0″ + m;
dd = d.Day.ToString();
if (dd.Length < 2) dd = “0″ + dd;
h = d.Hour.ToString();
if (h.Length < 2) h = “0″ + h;
mm = d.Minute.ToString();
if (mm.Length < 2) mm = “0″ + mm;
ss = d.Second.ToString();
if (ss.Length < 2) ss = “0″ + ss;
s += y + m + dd + h + mm + ss;
s += ra.Next(100, 999).ToString();
return s;
}
#endregion
#region 生成GUID
/// <summary>
/// 生成GUID
/// </summary>
/// <returns></returns>
public static string GetGuid()
{
System.Guid g = System.Guid.NewGuid();
return g.ToString();
}
#endregion
}
}
Asp.NET 生成随机码基类(随机字母,随机数字,随机字母+数字 )
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