Read from text file to text box

nigel drakes

16y4.1kVisual Basic .NET

need help with these questions I am not verry skilled in programming

Add the following forms to the Program 1 Project in your Assignment 5:

1) DeleteEmployee Form

• You will need a text box for the user to enter an Employee ID

• You will also need a Delete Employee button

• Clicking on the Delete Employee button should remove the employee data

from the employee.txt file. If the employee does not exist in the

employee.txt file, display an appropriate message on the screen.

2) DisplayEmployee Form

• You will need a text box for the user to enter an Employee ID

• You will also need a Display Employee button

• Clicking on Display Employee button will search for the given employee

in the employee.txt file and display the employee data on the screen (use

different label for different data items). If the employee does not exist in
the employee.txt file, display an appropriate message on the screen.

7 Replies

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Sam Hobbs16y ago
Note that in:

String str = sr.ReadLine();
while (str != null)
{
label1.Text = strFromFile;
}

You read the data into str but that is not the data you put into label1.Text. That's the main problem with that. The only other problem is that you replace label1.Text each time the while loop executes, but you do not read any more data. Roy's code solves all those problems. Also, instead of Roy's code:

while ((line = file.ReadLine()) != null)
            {
                label1.Text += line;
            }

You could do all that using:

label1.Text = file.ReadToEnd();
nigel drakes16y ago
That worked You dont know how long I have been trying to get this to work. I am taking a programming class. Some time I think things make sense but for some reason I guess my logic is incorrect. Can I ask you some more Question maybe later on.

Thanks
Roy
Roy S16y ago
Try this:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace WindowsFormsApplication19
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            string line;

            StreamReader file = new StreamReader("c:\\first.txt");
            while ((line = file.ReadLine()) != null)
            {
                label1.Text += line;
            }

            file.Close();
        }
    }
}
nigel drakes16y ago

this is my code I tried what you said but there is some part I am missing it makes sense to me but I guess its wrong because it does not do nathing bu give me an error.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace WindowsFormsApplication19
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
StreamReader sr = new StreamReader("C:\\first.txt");
String str = sr.ReadLine();
while (str != null)
{
label1.Text = strFromFile;

}

}
}
}
Roy S16y ago
Oh, well if you can read it you can get it as a string and to make it show up in the textbox you just have to set the text property of the textbox.

txtBox.Text = strFromFile;

Or am I again thinking too simple again while your real problem is way more complicated?
nigel drakes16y ago
I know how to read it to the console I want what i have read to show up in a text box or label.

thanks
Roy S16y ago
So you need to find out how to read from a text file? This will explain the basics of it:
http://www.csharp-station.com/HowTo/ReadWriteTextFile.aspx