using System;
namespace DotNet.Utilities
{
 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()
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;
}
#region public static int GetRandom()
public static
 
 int GetRandom()
{
return Random.Next(Minimum,Maximal);
}
#endregion
#region public static int GetRandom(int minimum,int maximal)
public static int GetRandom(int minimum,int maximal)
{
return Random.Next(minimum,maximal);
}
#endregion
}
}

using System;
namespace DotNet.Utilities
{
 ///使用Random類生成偽隨機數
 

public class RandomHelper
{
 //隨機數對象
private Random _random;
#region 構造函數
public RandomHelper()
{
//為隨機數對象賦值
this._random=new Random();
}
#endregion
#region 生成一個指定範圍的隨機整數
public int GetRandomInt(int minNum,int maxNum)
{
return this._random.Next(minNum,int maxNum);
}
#endregion
#region 生成一個0.0到1.0的隨機小數
public double GetRandomDouble()
{
return this._random.NextDouble();
}
#endregion
#region對一個數組進行隨機排序
public void GetRandomArray<T>(T[] arr)
{
int count=arr.Length;
//開始交換
for(int i=0;i<count;i++)
{
//生成兩個隨機數位置
int randomNum1=GetRandomInt(0,arr.Length);
int randomNum2=GetRandomInt(0,arr.Length);
//定義臨時變量
T temp;
//交換兩個隨機數位置的值
temp =arr[randomNum1]
arr[randomNum1]=arr[randomNum2];
arr[randomNum2]=temp;
}
}
#endregion
}
}

using System;
namespace DotNet.Utilities
{
public class RandomOperate
{
 //一：隨機生成不重復數字字符串
private int rep=0;
public string GenerateCheckCodeNum(int codeCount)
{
string str=string.Empty;
long num2=DateTime.Now.Ticks+this.rep;
this.rep++;
Random random=new Random(((int)(((ulong)num2)&0xffffffffL))|((int)(num2>>this.rep)));
for(int i=0;i<codeCount;i++)
{
int num=random.Next();
str=str+((char)(0x30+((ushort)(num%10)))).ToString();
}
return str;
}
//方法二：隨機生成字符串（數字和字母混合）
public string GenerateCheckCode(int codeCount)
{
string str=string.Empty;
long num2=DateTime.Now.Ticks+this.rep;
this.rep++;
Random random=new Random(((int)(((ulong)num2)&0ffffffffL))|((int)(num2>>this.rep)));
for(int i=0;i<codeCount;i++)
{
char ch;
int num=random.Next();
if((num%2)==0
{
ch=(char)(ox30+((ushort)(num%10)));
}
else
{
ch=(char)(0x41+((ushort)(num%0x1a)));
}
str=str+ch.ToString();
}
return str;
}
#region
private string GetRandomCode(string allChar,int CodeCount)
{
string[] allCharArray=allChar.Split(‘,‘);
string RandomCode="";
int temp=-1;
Random rand=new Random();
for(int i=0;i<CodeCount;i++)
{
if(temp !=-1)
{
rand-new Random(temp*i*((int)DateTime.Now.Ticks));
}
int t=rand.Next(allCharArray.Length-1);
while (temp==t)
{
t=rand.Next(allCharArray.Length-1);
}
temp=t;
RandomCode +=allCharArray[t];
}
return RandomCode;
}
#endregion
}
}

C#隨機數類