count the number of characters in a string

Question

Hi All,

I want to count occurance of number in string.All the in the "Notepad" file. "C:\Users\family\Documents\Tool.txt".

7916,1465,8157,8772,5279,8812,8665,9345,9341,6727
0394,2309,9371,9343,8240,8149,2140,4515,7396,7356

Put to the List Data1.Then split (',')
Put again into List Data2.When I use the listbox to show the List Data2, it look like
7916
1465
8157
8772
I need Data2 show like bellow then count.
7916146581578772527988128665934593416727
0394230993719343824081492140451573967356

Then count Occurance number 0 to 9

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_8  
{  
    public partial class Form1 : Form  
    {  
        List<string> Data1 = new List<string>();  
        List<string> Data2 = new List<string>();  
        List<string> Data3 = new List<string>();  
  
        public Form1()  
        {  
            InitializeComponent();  
        }  
  
        private void button1_Click(object sender, EventArgs e)  
        {  
            string[] lines = System.IO.File.ReadAllLines(@"C:\Users\family\Documents\Tool.txt");  
  
            foreach (var vNum in lines)  
            {  
                listBox1.Items.Add(vNum);  
            }  
        }  
  
  
        private void button2_Click(object sender, EventArgs e)  
        {  
            string[] separatingStrings = { "<<", "...", "," };  
            char[] charSeparators = new char[] { ',', ' ' };  
  
            Data1.AddRange(File.ReadAllLines(@"C:\Users\family\Documents\Tool.txt"));  
  
            for (int i = 0; i < Data1.Count; i++)  
            {  
                listBox1.Items.Add(Data1[i]);  
                String StringToCheck = Data1[i].ToString();  
                String[] StringsToCheck = StringToCheck.Split(charSeparators);  
                Data2.AddRange(StringsToCheck);  
            }  
  
        }  
  
        private void button3_Click(object sender, EventArgs e)  
        {  
            for (int j = 0; j <=9 ; j++)  
            {  
                String Number_ = j.ToString();  
                int NumberCount_ = Data3[j].ToCharArray().Count(c => c == Number_);  
                listBox3.Items.Add(NumberCount_);  
  
            }  
  
  
        }  
    }  
}  








  
  

Answer 1

Here is go

string values =   
    "791614658157877252798812866593459341672" +   
    "70394230993719343824081492140451573967356";  
  
var characterGroup = (  
        from chr in values.ToCharArray()  
        group chr by chr into grp  
        select new  
        {  
            Letter = grp.Key,  
            Occurrences = grp.Count(),  
            Code = Convert.ToInt32((int)grp.Key)  
        })  
    .ToList()  
    .OrderBy((item) => item.Letter.ToString());  
  
dataGridView1.DataSource = (from item in characterGroup select item).ToList();  

Or for in a class

Class

public class Item  
{  
    public char Letter { get; set; }  
    public int Occurrences { get; set; }  
    public int Code { get; set; }  
     
}  

Worker class

public class Operations  
{  
    public static List<Item> GetItems(string values)  
    {  
        var characterGroup = (  
                from chr in values.ToCharArray()  
                group chr by chr into grp  
                select new Item { Letter = grp.Key, Occurrences = grp.Count(), Code = Convert.ToInt32((int)grp.Key) })  
            .ToList()  
            .OrderBy((item) => item.Letter.ToString());  
  
        return (from item in characterGroup select item).ToList();  
          
    }  

Usage

private void CountButton_Click(object sender, EventArgs e)  
{  
    string values =   
        "791614658157877252798812866593459341672" +   
        "70394230993719343824081492140451573967356";  
  
    dataGridView1.DataSource = Operations.GetItems(values);  
}  

In a ListBox

public class Item  
{  
    public char Letter { get; set; }  
    public int Occurrences { get; set; }  
    public int Code { get; set; }  
    public override string ToString() => $"{Letter} - {Occurrences}";  
}  

Usage

private void CountButton_Click(object sender, EventArgs e)  
{  
    string values =   
        "791614658157877252798812866593459341672" +   
        "70394230993719343824081492140451573967356";  
    listBox1.DataSource = Operations.GetItems(values);  
  
}  

Edit, to get a string from comma and returns

    var raw = @"7916,1465,8157,8772,5279,8812,8665,9345,9341,6727  
0394,2309,9371,9343,8240,8149,2140,4515,7396,7356";  
    string values = raw.Replace(",", "").Replace("\r\n", "");  
    listBox1.DataSource = Operations.GetItems(values);  

Answer 2

@MiPakTeh , based on your description, you want to count the number of characters in a string from the txt file.

Here is a code example you could refer to.

 public partial class Form1 : Form  
    {  
        public Form1()  
        {  
            InitializeComponent();  
        }  
  
        List<string> Data1 = new List<string>();  
        List<string> Data2 = new List<string>();  
        List<string> Data3 = new List<string>();  
        private void button1_Click(object sender, EventArgs e)  
        {  
            string[] lines = System.IO.File.ReadAllLines(@"C:\Users\username\Desktop\test1.txt");  
  
            foreach (var vNum in lines)  
            {  
                listBox1.Items.Add(vNum);  
                Data1.Add(vNum);  
            }  
        }  
  
        private void button2_Click(object sender, EventArgs e)  
        {  
            foreach (var item in Data1)  
            {  
                string t = item.Replace(",","").Trim();  
                Data2.Add(t);  
            }  
            foreach (var item in Data2)  
            {  
                listBox2.Items.Add(item);  
            }  
        }  
  
        private void button3_Click(object sender, EventArgs e)  
        {  
            foreach (var item in Data2)  
            {  
                for (int j = 0; j <= 9; j++)  
                {  
                    String Number_ = j.ToString();  
                    int NumberCount_ = item.ToCharArray().Count(c => c.ToString() == Number_);  
                    //int NumberCount_ = Data2[0].Count(c => c.ToString() == Number_);  
                    listBox3.Items.Add(j.ToString() + "-" + NumberCount_);  
                }  
                listBox3.Items.Add("************************");  
            }  
              
  
        }  
    }  

If you click button 1 button 2 button 3 in turn, you will get the following result：

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