Question

In this lab, you will learn to read data from a sequential-access text file. To read data from a file, you need one FileStream object and one StreamReader object. The StreamReader object accepts the FileStream object as its argument.
To read data from a sequential-access text file, here's what you need to do:

1. From the desktop, open Visual Studio 2017.
2. From the menu bar, navigate to File > New > Project.
3. In the New Project window, select Windows Forms App (.NET Framework).
4. Type Name as StudentData and verify that the Solution name is automatically set as StudentData and click OK to create a new project with a textbox and button to open file information that contains student details.
5. From the left side, navigate to Toolbox > All Windows Forms, drag Label and drop it on the blank area of the Form1 section.
6. In the right pane, in the Properties side panel, under the Appearance section, remove the Text field's default value, i.e., label1.
7. From the left side, navigate to Toolbox > All Windows Forms, drag Button, and drop it on the blank area of the Form1 section.
8. In the right pane, in the Properties section, type Text as Open File.
9. Double-click the Open File button.
10. In the Form1.cs window, under using System.Windows.Forms, type the following code to include the System.IO library:Copy

    using System.IO;

11. In the Form1.cs window, under private void button1_Click(object sender, EventArgs e), type the following code to declare and define an object, obtain a path for the text file, and display the file name encoded to UTF8 as output:Copy
    1. OpenFileDialog openFileDialog1 = new OpenFileDialog();
    2. openFileDialog1.ShowDialog();
    3. String file_name = openFileDialog1.FileName;
    4. string text = File.ReadAllText(@file_name, Encoding.UTF8);
    5. label1.Text = text;
12. From the menu bar, navigate to Debug > Start Without Debugging and wait for the Form1 window to appear.
13. In the Form1 window, click Open File.
14. In the Open window, in the left pane, navigate to Local Disk (C:), select (say) the ip.txt file and click Open. You will see the file name encoded to UTF8.
15. Close all the windows.

Answer 1

/* Please see the source code */

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

private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.ShowDialog();
String file_name = openFileDialog1.FileName;
string text = File.ReadAllText(@file_name, Encoding.UTF8);
label1.Text = text;
}
}
}

/* See the editor screen*/

/* Output */

/* Output */

/* That's all. Thanks */

:)