C # random number class,

C # random number class,

Using System; namespace DotNet. Utilities {// <summary> /// BaseRandom // random number is generated // random number management. You can set the maximum and minimum values by yourself. /// </Summary> public class BaseRandom {public static int Minimum = 100000; public static int Maximal = 999999; public static int RandomLength = 6; private static string RandomString = "0123456789 ABCDEFGHIJKMLNOPQRSTUVWXYZ"; private static Random = new Random (DateTime. now. second); # region public static string GetRandomString () generate random characters // <summary> // generate random characters // </summary> // <returns> string </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> // generate a Random number // </summary> /// <returns> Random number </returns> public static int GetRandom () {return Random. next (Minimum, Maximal) ;}# endregion # region public static int GetRandom (int minimum, int maximal) /// <summary> /// generate a random number /// </summary> /// <param name = "minimum"> minimum value </param> /// <param name = "maximal"> maximum value </param> // <returns> random number </returns> public static int GetRandom (int minimum, int maximal) {return Random. next (minimum, maximal) ;}# endregion }}

BaseRandom

 

Using System; namespace DotNet. utilities {// <summary> /// use the Random class to generate a pseudo-Random number // </summary> public class RandomHelper {// the random number object private Random _ Random; # region constructor // <summary> /// constructor // </summary> public RandomHelper () {// assign this to a random number object. _ random = new Random () ;}# endregion # region generates a random integer in the specified range /// <summary> /// generates a Random integer in the specified range, the random number range includes the minimum value, excluding the maximum value /// </summary> /// <param name = "minNum"> Minimum value </param> /// <param name = "maxNum"> maximum value </param> public int GetRandomInt (int minNum, int maxNum) {return this. _ random. next (minNum, maxNum );} # endregion # region generates a random decimal number between 0.0 and 1.0 /// <summary> // generates a random decimal number between 0.0 and 1.0 /// </summary> public double GetRandomDouble () {return this. _ random. nextDouble ();} # endregion # region random sorting of an array /// <summary> /// random sorting of an array /// </summary> /// <typeparam name =" T "> array type </typeparam> // <param name =" arr "> array to be sorted randomly </param> public void GetRandomArray <T> (T [] arr) {// random sorting algorithm for Arrays: randomly selects two locations and exchanges the values in the two locations, here we use the length of the array as the number of exchanges int count = arr. length; // start to switch for (int I = 0; I <count; I ++) {// generate two random number positions: int randomNum1 = GetRandomInt (0, arr. length); int randomNum2 = GetRandomInt (0, arr. length); // defines the temporary variable T temp; // exchanges the values of the two random numbers. temp = arr [randomNum1]; arr [randomNum1] = arr [randomNum2]; arr [randomNum2] = temp ;}# endregion }}

RandomHelper

 

Using System; namespace DotNet. utilities {public class RandomOperate {// a random non-repeating numeric string 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) & 0 xffffffffL) | (int) (num2> this. rep); for (int I = 0; I <codeCount; I ++) {int num = random. next (); s Tr = str + (char) (0x30 + (ushort) (num % 10 )))). toString () ;}return str ;}// Method 2: randomly generated string (mixed numbers and letters) 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) & 0 xffffffffL) | (int) (num2> this. rep); for (int I = 0; I <codeCount; I ++) {char ch; int num = random. next (); if (Num % 2) = 0) {ch = (char) (0x30 + (ushort) (num % 10 )));} else {ch = (char) (0x41 + (ushort) (num % 0x1a);} str = str + ch. toString () ;}return str ;}# region /// <summary> /// random string of the specified number. /// </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, 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 =-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 }}

RandomOperate