Question

Must be in Visual C# using windows forms : Create an application that opens a specified text file and then displays a list of all the unique words found in the file. Hint: Use a LINQ method to remove all duplicate words.

Answer 1

code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Text.RegularExpressions;
using System.Collections;

namespace UniqueWordsForm
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
string txt = File.ReadAllText("doc.txt");
string[] arr = txt.Split(' ');
string[] res = UniqueWords(arr);
listBox1.DataSource = res;
}

public static string[] UniqueWords(string[] input)
{
if (input == null)
return new string[0];
else
{
ArrayList arr = new ArrayList();
for (int i = 0; i < input.Length; i++)
if (!arr.Contains(input[i]))
arr.Add(input[i]);
return (string[])arr.ToArray("".GetType());
}
}
}
}

Design:

namespace UniqueWordsForm
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;

/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}

#region Windows Form Designer generated code

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.listBox1 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(84, 56);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 13);
this.label1.TabIndex = 2;
this.label1.Text = "Unique words";
//
// button1
//
this.button1.Location = new System.Drawing.Point(340, 144);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(107, 53);
this.button1.TabIndex = 3;
this.button1.Text = "Process file";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// listBox1
//
this.listBox1.FormattingEnabled = true;
this.listBox1.Location = new System.Drawing.Point(87, 144);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 173);
this.listBox1.TabIndex = 4;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(538, 375);
this.Controls.Add(this.listBox1);
this.Controls.Add(this.button1);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "te";
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.ListBox listBox1;
}
}