生成随机码类 （全）
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 Byecity2011.WebSite.Utils
{
/// <summary>
/// 生成随机码类
/// </summary>
public class RandomObj
{
/// <summary>
///
/// </summary>
public RandomObj()
{
}
#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
&
补充：Web开发 , ASP.Net ,
