Practice Exercises C# Sharp - Learn to program with performing exercises C# Sharp

Practice Exercises C# Sharp

Learn to program with performing exercises C# Sharp

Search in file - Practice Exercises C# Sharp
Practice Exercises C# Sharp4,85320940

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Search in file - Practice Exercises C# Sharp


Lesson 11:

Dynamic memory management


Exercise 11.13:

Search in file


Objetive:

Create a program to read a text file and ask the user for sentences to search in it.

It will read the whole file, store it in an ArrayList, ask the user for a word (or sentence) and display all the lines that contain such word. Then it will ask for another word and so on, until the user enters an empty string.


Source Code:


using System;
using System.Collections;
using System.IO;
namespace Contains
{
    class Program
    {
        static void Main(string[] args)
        {
            StreamReader myfile = File.OpenText("text.txt");

            try
            {
                ArrayList list = new ArrayList();
                string line;
                do
                {
                    line = myfile.ReadLine();
                    if (line != null)
                        list.Add(line);
                }
                while (line != null);
                myfile.Close();

                string sentence;
                bool exit = false;

                do
                {
                    Console.Write("Enter word or sentence: ");
                    sentence = Console.ReadLine();

                    if (sentence == "")
                        exit = true;
                    else
                    {
                        for (int i = 0; i < list.Count; i++)
                        {
                            string sentenceList = (string)list[i];

                            if (sentenceList.Contains(sentence))
                            {
                                Console.WriteLine(sentenceList);
                            }
                        }
                    }
                }
                while (!exit);

            }
            catch (Exception e)
            {
                Console.WriteLine("Error, " + e.Message);
            }
        }
    }
}
Exercisey 11.13





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