例子1
ASP.NET c#產生隨機數的類檔案，按要求產生一些隨機數，最大值、最小值可以自己進行設定。代碼簡單，可放在你的公用庫內供調用使用；類代碼具體如下：
| 代碼如下 |
複製代碼 |
using System;
namespace DotNet.Utilities
{
/// BaseRandom
/// 產生隨機數
/// 隨機數管理，最大值、最小值可以自己進行設定。
public class BaseRandom
{
public static int Minimum = 100000;
public static int Maximal = 999999;
public static int RandomLength = 6;
private static string RandomString = "0123456789ABCDEFGHIJKMLNOPQRSTUVWXYZ";
private static Random Random = new Random(DateTime.Now.Second);
#region public static string GetRandomString() 產生隨機字元
/// 產生隨機字元
/// <returns>字串</returns>
public static string GetRandomString()
{
string returnValue = string.Empty;
for (int i = 0; i < RandomLength; i++)
{
int r = Random.Next(0, RandomString.Length - 1);
returnValue += RandomString[r];
}
return returnValue;
}
#endregion
#region public static int GetRandom()
/// <summary>
/// 產生隨機數
/// </summary>
/// <returns>隨機數</returns>
public static int GetRandom()
{
return Random.Next(Minimum, Maximal);
}
#endregion #region public static int GetRandom(int minimum, int maximal)
/// <summary>
/// 產生隨機數
/// </summary>
/// <param name="minimum">最小值</param>
/// <param name="maximal">最大值</param>
/// <returns>隨機數</returns>
public static int GetRandom(int minimum, int maximal)
{
return Random.Next(minimum, maximal);
}
#endregion
}
} |
例子2
random函數來產生隨機數
| 代碼如下 |
複製代碼 |
static int GetRandomSeed( )
{
byte[] bytes = new byte[4];
System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider( );
rng.GetBytes( bytes );
return BitConverter.ToInt32( bytes , 0 );
} Random random = new Random( GetRandomSeed( ) ); |
例子3，產生固定長度的隨機數
| 代碼如下 |
複製代碼 |
<%@ Page Language="C#" %> <%
//----------------------- 隨機密碼開始 ---------------------------
ArrayList MyArray = new ArrayList();
Random random = new Random();
string str = null;
//迴圈的次數
int Nums = 6;
while (Nums > 0)
{
int i = random.Next(1, 9);
// if (!MyArray.Contains(i))
// {
if (MyArray.Count < 6)
{
MyArray.Add(i);
}
// }
Nums -= 1;
}
for (int j = 0; j <= MyArray.Count - 1; j++)
{
str += MyArray[j].ToString();
}
//----------------------- 隨機密碼結束 ---------------------------
Response.Write(str + " my array count --> " + MyArray.Count);
%> |
