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Asp.NET 隨機(jī)碼生成基類(隨機(jī)字母,隨機(jī)數(shù)字,隨機(jī)字母+數(shù)字)

更新時(shí)間：2008年11月10日 11:51:08 作者：

對于需要用asp.net 字母,隨機(jī)數(shù)字,隨機(jī)字母+數(shù)字生成隨機(jī)碼的朋友用的到

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> 
/// 隨機(jī)函數(shù) 
/// </summary> 
public class RandomObject 
{ 
#region 數(shù)字隨機(jī)數(shù) 
/// <summary> 
/// 數(shù)字隨機(jī)數(shù) 
/// </summary> 
/// <param name="n">生成長度</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 數(shù)字和字母隨機(jī)數(shù) 
/// <summary> 
/// 數(shù)字和字母隨機(jī)數(shù) 
/// </summary> 
/// <param name="n">生成長度</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 字母隨機(jī)數(shù) 
/// <summary> 
/// 字母隨機(jī)數(shù) 
/// </summary> 
/// <param name="n">生成長度</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 日期隨機(jī)函數(shù) 
/// <summary> 
/// 日期隨機(jī)函數(shù) 
/// </summary> 
/// <param name="ra">長度</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 
} 
} 