Asp.NETランダムコード生成ベースクラス(ランダムアルファベット、ランダム数字、ランダムアルファベット+数字)

 
  
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 
  
{ 
  
/// 
 
  
///      
  
/// 
 
  
public class RandomObject 
  
{ 
  
#region       
  
/// 
 
  
///       
  
/// 
 
  
///      
  
///  
  
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          
  
/// 
 
  
///          
  
/// 
 
  
///      
  
///  
  
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       
  
/// 
 
  
///       
  
/// 
 
  
///      
  
///  
  
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        
  
/// 
 
  
///        
  
/// 
 
  
///    
  
///  
  
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   GUID 
  
/// 
 
  
///   GUID 
  
/// 
 
  
///  
  
public static string GetGuid() 
  
{ 
  
System.Guid g = System.Guid.NewGuid(); 
  
return g.ToString(); 
  
} 
  
#endregion 
  
} 
  
}