[RESOLVED] Help! Vb.net Reading a text file line by line

ok so i got vb to read the text file but it reads the whole thing and displays it on a text line,
how can i make it so it reads it like 1 line at a time after every click,
so if my text file is like this
hello
goodbye

then i dont want it to display both, i want it to display hello and if i click a button again then it displays goodbye,

Thanks in advance

here's how. on load it reads your text file into a string array, then displays the lines 1 by 1 as you click the button:

vb Code:

Public Class Form1
 
    Dim lines() As String
    Dim index As Integer = 0
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        lines = IO.File.ReadAllLines("filename.txt")
    End Sub
 
    Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button1.Click
        TextBox1.Text &= lines(index) & Environment.NewLine
        index += 1
        If index > lines.GetUpperBound(0) Then button1.Enabled = False
    End Sub
 
End Class

vb Code:

'
Public Class Form1
 
    Private sr As IO.StreamReader
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Debug.Assert(Not IsNothing(sr))
 
        ' checking whether we're not at the end yet
        If Not (sr.EndOfStream) Then
            ' Read the next line and display in in the texbox
            TextBox1.Text = sr.ReadLine()
        Else
            MessageBox.Show("Reached the end of file")
        End If
    End Sub
 
    Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        sr.Close()
        sr.Dispose()
    End Sub
 
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Using dlg As New OpenFileDialog With {.CheckFileExists = True}
            Dim ret As DialogResult = dlg.ShowDialog(Me)
            If ret = Windows.Forms.DialogResult.OK Then
                Try
                    ' Open file for reading
                    sr = New IO.StreamReader(New IO.FileStream(dlg.FileName, IO.FileMode.Open, IO.FileAccess.Read, IO.FileShare.Read))
                Catch ex As Exception
                    ' Catching possible exceptions
                    MessageBox.Show(ex.Message)
                End Try
            End If
        End Using
 
    End Sub
End Class

Quote:

---

Originally Posted by .paul.

here's how. on load it reads your text file into a string array, then displays the lines 1 by 1 as you click the button:

vb Code:

Public Class Form1
 
    Dim lines() As String
    Dim index As Integer = 0
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        lines = IO.File.ReadAllLines("filename.txt")
    End Sub
 
    Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button1.Click
        TextBox1.Text &= lines(index) & Environment.NewLine
        index += 1
        If index > lines.GetUpperBound(0) Then button1.Enabled = False
    End Sub
 
End Class

---

thank you but it did not work as i intended it did not display the second part it only displayed the first part.

Quote:

---

Originally Posted by cicatrix

vb Code:

'
Public Class Form1
 
    Private sr As IO.StreamReader
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Debug.Assert(Not IsNothing(sr))
 
        ' checking whether we're not at the end yet
        If Not (sr.EndOfStream) Then
            ' Read the next line and display in in the texbox
            TextBox1.Text = sr.ReadLine()
        Else
            MessageBox.Show("Reached the end of file")
        End If
    End Sub
 
    Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        sr.Close()
        sr.Dispose()
    End Sub
 
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Using dlg As New OpenFileDialog With {.CheckFileExists = True}
            Dim ret As DialogResult = dlg.ShowDialog(Me)
            If ret = Windows.Forms.DialogResult.OK Then
                Try
                    ' Open file for reading
                    sr = New IO.StreamReader(New IO.FileStream(dlg.FileName, IO.FileMode.Open, IO.FileAccess.Read, IO.FileShare.Read))
                Catch ex As Exception
                    ' Catching possible exceptions
                    MessageBox.Show(ex.Message)
                End Try
            End If
        End Using
 
    End Sub
End Class

---

Thank you but that did not work,my app crashed...

Quote:

---

Originally Posted by M0NKEYRASH

thank you but it did not work as i intended it did not display the second part it only displayed the first part.

---

in your text file, does it look like this:

Quote:

---

hello
goodbye

---

?

with each line on a new line?

What do you mean 'crashed'? At which line?

Quote:

---

Originally Posted by .paul.

in your text file, does it look like this:



?

with each line on a new line?

---

yes my text file did look like that but what the app did was just display the first line over and over but it did not display it once it did it like this, hellohellohello
everclick

Quote:

---

Originally Posted by cicatrix

What do you mean 'crashed'? At which line?

---

it did not crash that was my other app i was working on while i was waiting for an answer,silly me and thank you for helping i do like how it opens up the open page and how would i make it read two txt files ? i really do like the code :) ratings for both of you!

EDIT: and how to do i name the OPEN so i can specify which txt to choose?