Question

How to generate random string without repetition in C#

Answer 1

using System;
using System.Linq;
using System.Collections.Generic;

public class RandomString {
    public static string GenerateRandStringWithoutRepetition(int size) {
        string characters = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
        
        List<char> charList = new List<char>();
        foreach (char ch in characters) {
            charList.Add(ch);
        }
        
        charList = charList.OrderBy(c => Guid.NewGuid()).ToList();
        
        string randString = "";
        
        for (int i = 0; i < size; i++) {
            randString += charList[i];
        }
        
        return randString;
    }

    public static void Main(string[] args) {
        int length = 15;
        
        string randomString = GenerateRandStringWithoutRepetition(length);
        
        Console.WriteLine(randomString);
    }
}



/*
run:
 
hAixWFq83PcbTmp
 
*/

 

70+ SQL courses for beginners and professionals