using System; namespace DotNet.Utilities
{
/// <summary>
/// BaseRandom
/// 产生随机数
///
/// 随机数管理，最大值、最小值可以自己进行设定。
/// </summary>
public class BaseRandom
{
public static int Minimum = ;
public static int Maximal = ;
public static int RandomLength = ; private static string RandomString = "0123456789ABCDEFGHIJKMLNOPQRSTUVWXYZ";
private static Random Random = new Random(DateTime.Now.Second); #region public static string GetRandomString() 产生随机字符
/// <summary>
/// 产生随机字符
/// </summary>
/// <returns>字符串</returns>
public static string GetRandomString()
{
string returnValue = string.Empty;
for (int i = ; i < RandomLength; i++)
{
int r = Random.Next(, RandomString.Length - );
returnValue += RandomString[r];
}
return returnValue;
}
#endregion #region public static int GetRandom()
/// <summary>
/// 产生随机数
/// </summary>
/// <returns>随机数</returns>
public static int GetRandom()
{
return Random.Next(Minimum, Maximal);
}
#endregion #region public static int GetRandom(int minimum, int maximal)
/// <summary>
/// 产生随机数
/// </summary>
/// <param name="minimum">最小值</param>
/// <param name="maximal">最大值</param>
/// <returns>随机数</returns>
public static int GetRandom(int minimum, int maximal)
{
return Random.Next(minimum, maximal);
}
#endregion
}
}
BaseRandom
using System; namespace DotNet.Utilities
{
/// <summary>
/// 使用Random类生成伪随机数
/// </summary>
public class RandomHelper
{
//随机数对象
private Random _random; #region 构造函数
/// <summary>
/// 构造函数
/// </summary>
public RandomHelper()
{
//为随机数对象赋值
this._random = new Random();
}
#endregion #region 生成一个指定范围的随机整数
/// <summary>
/// 生成一个指定范围的随机整数，该随机数范围包括最小值，但不包括最大值
/// </summary>
/// <param name="minNum">最小值</param>
/// <param name="maxNum">最大值</param>
public int GetRandomInt(int minNum, int maxNum)
{
return this._random.Next(minNum, maxNum);
}
#endregion #region 生成一个0.0到1.0的随机小数
/// <summary>
/// 生成一个0.0到1.0的随机小数
/// </summary>
public double GetRandomDouble()
{
return this._random.NextDouble();
}
#endregion #region 对一个数组进行随机排序
/// <summary>
/// 对一个数组进行随机排序
/// </summary>
/// <typeparam name="T">数组的类型</typeparam>
/// <param name="arr">需要随机排序的数组</param>
public void GetRandomArray<T>(T[] arr)
{
//对数组进行随机排序的算法:随机选择两个位置，将两个位置上的值交换 //交换的次数,这里使用数组的长度作为交换次数
int count = arr.Length; //开始交换
for (int i = ; i < count; i++)
{
//生成两个随机数位置
int randomNum1 = GetRandomInt(, arr.Length);
int randomNum2 = GetRandomInt(, arr.Length); //定义临时变量
T temp; //交换两个随机数位置的值
temp = arr[randomNum1];
arr[randomNum1] = arr[randomNum2];
arr[randomNum2] = temp;
}
}
#endregion
}
}
RandomHelper
using System; namespace DotNet.Utilities
{
public class RandomOperate
{
// 一：随机生成不重复数字字符串
private int rep = ;
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 = ; i < codeCount; i++)
{
int num = random.Next();
str = str + ((char)(0x30 + ((ushort)(num % )))).ToString();
}
return str;
} //方法二：随机生成字符串（数字和字母混和）
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) & 0xffffffffL)) | ((int)(num2 >> this.rep)));
for (int i = ; i < codeCount; i++)
{
char ch;
int num = random.Next();
if ((num % ) == )
{
ch = (char)(0x30 + ((ushort)(num % )));
}
else
{
ch = (char)(0x41 + ((ushort)(num % 0x1a)));
}
str = str + ch.ToString();
}
return str;
} #region /// <summary>
/// 从字符串里随机得到，规定个数的字符串.
/// </summary>
/// <param name="allChar"></param>
/// <param name="CodeCount"></param>
/// <returns></returns>
private string GetRandomCode(string allChar, int CodeCount)
{
//string allChar = "1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,i,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";
string[] allCharArray = allChar.Split(',');
string RandomCode = "";
int temp = -;
Random rand = new Random();
for (int i = ; i < CodeCount; i++)
{
if (temp != -)
{
rand = new Random(temp * i * ((int)DateTime.Now.Ticks));
} int t = rand.Next(allCharArray.Length - ); while (temp == t)
{
t = rand.Next(allCharArray.Length - );
} temp = t;
RandomCode += allCharArray[t];
}
return RandomCode;
} #endregion
}
}
RandomOperate