Introduction

This tutorial will provide a step-by-step guide on how to create a console application in C# that will count all ‘#’ characters in a text file. The application will read the text file line by line and count the number of ‘#’ characters in each line. The total number of ‘#’ characters in the text file will be displayed in the console window. This tutorial will also provide an example of how to use the StreamReader class to read the text file.

Solution

using System;
using System.IO;

namespace CountHashtags
{
class Program
{
static void Main(string[] args)
{
// Read the text file
string text = File.ReadAllText(“text.txt”);

// Count the number of ‘#’ characters
int count = 0;
foreach (char c in text)
{
if (c == ‘#’)
count++;
}

// Print the result
Console.WriteLine(“Number of ‘#’ characters: ” + count);
}
}
}

static void Main(string[] args) {
  //String fileName = @"C:\Documents and Settings\9chat73\Desktop\count.txt"; 

  // To search dinamically, just ask for a file:
  Console.WriteLine("Enter a file to search");
  String fileName = Console.ReadLine().Trim(); 

  if (File.Exists(fileName)) {
    Console.WriteLine("Enter a word to search");
    String pattern = Console.ReadLine().Trim();

    // Do not forget to escape the pattern! 
    int count = Regex.Matches(File.ReadAllText(fileName), 
                              Regex.Escape(pattern), 
                              RegexOptions.IgnoreCase).Count;

    Console.WriteLine(count.ToString());
  }

  Console.ReadLine();
}

Console Application to Count All ‘#’ Characters in a Text File

If you’re looking for a way to count all the ‘#’ characters in a text file, then you’ve come to the right place. This article will show you how to create a console application that can do just that.

Step 1: Create a Console Application

The first step is to create a console application. To do this, open Visual Studio and create a new project. Select the Console App (.NET Core) template and give it a name. Once the project is created, you can start coding.

Step 2: Read the Text File

The next step is to read the text file. To do this, you can use the File.ReadAllText() method. This method takes a path to the file as an argument and returns the contents of the file as a string.

Step 3: Count the ‘#’ Characters

Now that you have the contents of the file as a string, you can use the String.Count() method to count the number of ‘#’ characters. This method takes a character as an argument and returns the number of times it appears in the string.

Step 4: Output the Result

The final step is to output the result. To do this, you can use the Console.WriteLine() method. This method takes a string as an argument and prints it to the console.

Conclusion

In this article, we have seen how to create a console application to count all the ‘#’ characters in a text file. We have used the File.ReadAllText(), String.Count(), and Console.WriteLine() methods to achieve this.