复制代码 代码如下:

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

}

}