Question

Random Number File Reader This exercise assumes you have completed Programming Problem 13, Random Number File Writer . Create another application that uses an OpenFileDialog control to let the user select the file that was created by the application that you wrote for Problem 13. This application should read the numbers from the file, display the numbers in a ListBox control, and then display the following data: • The total of the numbers • The number of random numbers read from the file. TO BE DONE in C#

Answer 1

//Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Random_File_Reader
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}

//Form1.Designer.cs
namespace Random_File_Reader
{
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.components = new System.ComponentModel.Container();
this.write = new System.Windows.Forms.Button();
this.read = new System.Windows.Forms.Button();
this.msg = new System.Windows.Forms.ToolTip(this.components);
this.output = new System.Windows.Forms.ListBox();
this.outOne = new System.Windows.Forms.Label();
this.outTwo = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// write
//
this.write.Location = new System.Drawing.Point(54, 28);
this.write.Name = "write";
this.write.Size = new System.Drawing.Size(143, 33);
this.write.TabIndex = 0;
this.write.Text = "Write Random Numbers";
this.msg.SetToolTip(this.write, "Click to Write Random Numbers to the File");
this.write.UseVisualStyleBackColor = true;
this.write.Click += new System.EventHandler(this.write_Click);
//
// read
//
this.read.Location = new System.Drawing.Point(267, 28);
this.read.Name = "read";
this.read.Size = new System.Drawing.Size(143, 33);
this.read.TabIndex = 1;
this.read.Text = "Read Random Numbers";
this.msg.SetToolTip(this.read, "Click to Read Random Numbers from the File");
this.read.UseVisualStyleBackColor = true;
this.read.Click += new System.EventHandler(this.read_Click);
//
// output
//
this.output.FormattingEnabled = true;
this.output.Location = new System.Drawing.Point(28, 81);
this.output.Name = "output";
this.output.Size = new System.Drawing.Size(437, 238);
this.output.TabIndex = 2;
//
// outOne
//
this.outOne.AutoSize = true;
this.outOne.Font = new System.Drawing.Font("Microsoft Sans Serif", 11.25F);
this.outOne.ForeColor = System.Drawing.Color.Green;
this.outOne.Location = new System.Drawing.Point(86, 332);
this.outOne.Name = "outOne";
this.outOne.Size = new System.Drawing.Size(234, 18);
this.outOne.TabIndex = 3;
this.outOne.Text = "Total Random Numbers Read : ";
//
// outTwo
//
this.outTwo.AutoSize = true;
this.outTwo.Font = new System.Drawing.Font("Microsoft Sans Serif", 11.25F);
this.outTwo.ForeColor = System.Drawing.Color.Green;
this.outTwo.Location = new System.Drawing.Point(86, 366);
this.outTwo.Name = "outTwo";
this.outTwo.Size = new System.Drawing.Size(233, 18);
this.outTwo.TabIndex = 4;
this.outTwo.Text = "Sum of Random Numbers Read : ";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(487, 393);
this.Controls.Add(this.outTwo);
this.Controls.Add(this.outOne);
this.Controls.Add(this.output);
this.Controls.Add(this.read);
this.Controls.Add(this.write);
this.Name = "Form1";
this.Text = "Random Number Reader";
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.Button write;
private System.Windows.Forms.ToolTip msg;
private System.Windows.Forms.Button read;
private System.Windows.Forms.ListBox output;
private System.Windows.Forms.Label outOne;
private System.Windows.Forms.Label outTwo;
}
}

//Form1.cs
using System;
using System.IO;
using System.Windows.Forms;

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

private void write_Click(object sender, EventArgs e)
{
write_random();
}
private void write_random()
{
Random rand = new Random();
//ask user the location to save
SaveFileDialog dialog = new SaveFileDialog();
dialog.Title = "Enter the location and file name to Save";
string name = "";
if(dialog.ShowDialog() == DialogResult.OK)
{
name = dialog.FileName;
}
else
{
MessageBox.Show("Default File name with Random.txt is saved in current directory");
name = "Random.txt";
}
//write random number of numbers in the file selected
try
{
StreamWriter sw = new StreamWriter(name);
int num;
//generate a random number and write to file selected by the user
for (int i = 0; i < rand.Next(100, 1000); i++)
{
  
num = rand.Next(1, 1000);
Console.WriteLine("Writing Random Number: " +num );
sw.WriteLine(num);
}
sw.Close();
}
catch(Exception)
{
MessageBox.Show("Error occured");
}
  
}

private void read_Click(object sender, EventArgs e)
{
read_random();
}
private void read_random()
{
string name = "";
//ask user the location of random number to be read which contains random numbers
OpenFileDialog dialog = new OpenFileDialog();
dialog.Title = "Select the File that contains the Random numbers";
if(dialog.ShowDialog() == DialogResult.OK)
{
name = dialog.FileName;
try
{
StreamReader sr = new StreamReader(name);
string line = sr.ReadLine();
int num;
int sum = 0;
int total = 0;
//read a line
while(line!=null)
{
line = line.Trim();
try
{
//convert line to integer
//if it is int no error occure
//increment total and add sum
num = Convert.ToInt32(line);
sum += num;
total += 1;
output.Items.Add(line + "\n");
Console.WriteLine(num);

}
catch (Exception)
{
Console.WriteLine(line + " is not a number");
}
line = sr.ReadLine();
}
outOne.Text = "Total Random Numbers Read : " + total;
outTwo.Text = "Sum of Random Numbers Read : " + sum;
}
catch(Exception)
{
MessageBox.Show("Error occured while reading file");
}
  

}
else
{
MessageBox.Show("Unable to Load Random Number File");
}
}

}
}
//sample run of the file

//nums.txt contains the 156 random numbers generated

//nums.txt

100
608
128
150
87
990
382
179
310
375
503
216
169
675
603
85
527
408
81
60
405
5
186
41
760
270
437
760
597
154
965
497
124
344
44
754
293
591
575
191
67
298
237
73
361
928
674
275
651
265
737
965
662
105
428
944
40
953
792
343
409
900
724
806
858
703
563
349
700
525
582
81
942
810
86
522
82
297
879
384
982
444
702
207
717
599
785
854
755
213
94
169
754
70
189
408
806
466
326
254
952
890
376
557
974
147
597
664
683
397
725
365
258
795
429
313
691
612
308
508
805
760
301
294
104
49
531
423
891
161
125
757
345
244
206
476
53
535
711
969
415
914
75
295
641
945
588
710
126
186
229
782
207
712
378
769

//user selects the nums.txt file and program loads it and calculates the number of numbers and their sum

//sample output