Test All combination

Question

Hi All ,

I want to generate all the length-3, length-2, length-1 combinations of integers or string from text file.

It possible complete by Loop method.?

text file = 5682,2114,5671,3335,5603
0251,1292,8111,7166,6149

using System;  
using System.Collections.Generic;  
using System.ComponentModel;  
using System.Data;  
using System.Drawing;  
using System.IO;  
using System.Linq;  
using System.Text;  
using System.Threading.Tasks;  
using System.Windows.Forms;  
  
namespace TestFor_Other2  
{  
    public partial class Form1 : Form  
    {  
        List<string> Data1 = new List<string>();  
        List<string> Data2 = new List<string>();  
  
        public Form1()  
        {  
            InitializeComponent();  
            Data1.AddRange(File.ReadAllLines(@"C:\Users\family\Documents\Tool.txt"));  
  
        }  
  
            private void button1_Click(object sender, EventArgs e)  
        {  
            String st = "";  
  
  
            for (int ii = 0; ii < Data1.Count; ii++)  
            {  
                var StringTocheck = Data1[ii].Split(',').ToString();  
                {  
  
  
                    for (int i = 0; i < StringTocheck.Length; i++)  
                    {  
                        for (int j = 0; j < StringTocheck.Length; j++)  
                        {  
                            for (int k = 0; k < StringTocheck.Length; k++)  
                            {  
                                st += StringTocheck[i].ToString() + "    ";  
                                st += StringTocheck[i].ToString() + StringTocheck[j].ToString() + "    ";  
                                st += StringTocheck[i].ToString() + StringTocheck[j].ToString() + StringTocheck[k].ToString() + "    ";  
  
                            }  
                        }  
                    }  
                }  
                listBox1.Items.Add(st);  
  
            }  
  
        }  
  
        private void button2_Click(object sender, EventArgs e)  
        {  
  
        }  
    }  
}  



  
  

Answer 1

@MiPakTeh , based your description, you want to generate all the length-3, length-2, length-1 combinations of integers or string from text file.

I make a code example and you could refer to it.

 public partial class Form1 : Form  
    {  
        public Form1()  
        {  
            InitializeComponent();  
            Data1.AddRange(File.ReadAllLines(@"Tool.txt"));  
        }  
        List<string> Data1 = new List<string>();  
        char[] b;  
        string newstring;  
     
        private void button1_Click(object sender, EventArgs e)  
        {  
            for (int ii = 0; ii < Data1.Count; ii++)  
            {  
                List<string> list1 = new List<string>();  
                List<string> list2 = new List<string>();  
                var arr = Data1[ii].Split(',');  
                foreach (var item in arr)  
                {  
                    IEnumerable<IEnumerable<char>> result =  
    GetPermutations(item.ToCharArray().AsEnumerable(), 2);  
                    foreach (var item1 in result)  
                    {  
                        b = item1.ToList().ToArray();  
                        Array.Sort(b);  
                        newstring = new string(b);  
                        if(!newstring.StartsWith("0"))  
                        {  
                            list1.Add(newstring);  
                        }  
  
                        //list1.Add(newstring);  
  
                    }  
  
                    IEnumerable<IEnumerable<char>> result1 =  
   GetPermutations(item.ToCharArray().AsEnumerable(), 3);  
                    foreach (var item1 in result1)  
                    {  
                        b = item1.ToList().ToArray();  
                        Array.Sort(b);  
                        newstring = new string(b);  
                        if (!newstring.StartsWith("0"))  
                        {  
                              
                            list2.Add(newstring);  
                        }  
                        else  
                        {  
                            newstring=newstring.Remove(0, 1);  
                            list1.Add(newstring);  
                        }  
                        
                    }  
                }  
  
  
  
                listBox1.Items.Add(Data1[ii]);  
                listBox1.Items.Add("number 2");  
                listBox1.Items.AddRange(list1.ToArray());  
                listBox1.Items.Add("number 3");  
                listBox1.Items.AddRange(list2.ToArray());  
  
            }  
            
        }  
  
        static IEnumerable<IEnumerable<T>> GetPermutations<T>(IEnumerable<T> list, int length)  
        {  
            if (length == 1) return list.Select(t => new T[] { t });  
  
            return GetPermutations(list, length - 1)  
                .SelectMany(t => list.Where(e => !t.Contains(e)),  
                    (t1, t2) => t1.Concat(new T[] { t2 }));  
        }  
  
  
    }  

Result:

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Answer 2

If using .NET 6 (and if .NET Core 5, see the following class which once added to your project provides the same capabilities as .NET Core 6)

private static void ChunkingBy2()  
{  
    string input = "56822114567133355603";  
  
    List<char[]> output = input  
        .Chunk(2)  
        .Select(chunk => chunk).ToList();  
  
    StringBuilder builder = new();  
    foreach (var item in output)  
    {  
        builder.Append(new string(item.ToArray()) + " ");  
    }  
  
    Console.WriteLine(builder);  
    Console.WriteLine();  
}  
private static void ChunkingBy3()  
{  
    string input = "56822114567133355603";  
  
    List<char[]> output = input  
        .Chunk(3)  
        .Select(chunk => chunk).ToList();  
  
    StringBuilder builder = new();  
    foreach (var item in output)  
    {  
        builder.Append(new string(item.ToArray()) + " ");  
    }  
  
    Console.WriteLine(builder);  
  
}