I am a novice to vb.net, i have created a form with a command buttons and a text box. the form basically increments the value in a text box by one every time its pressed. what i wanted to do was then to write the value to a file, then when i reopen the file later read the number back to the text box and continue.
I have managed to write to a file and check to see if the correct value is there, which it is. but, i am having problems reading it back to file. Someone did say using the ReadAllLines, but it doesnt work in vb.net.
Here is my program code:
Imports System.IO
Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents Button3 As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough(... Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.Button2 = New System.Windows.Forms.Button
Me.Button3 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(64, 72)
Me.Button1.Name = "Button1"
Me.Button1.TabIndex = 0
Me.Button1.Text = "Add Person"
'
'TextBox1
'
Me.TextBox1.Location = New System.Drawing.Point(192, 72)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.TabIndex = 1
Me.TextBox1.Text = ""
'
'Button2
'
Me.Button2.Location = New System.Drawing.Point(176, 224)
Me.Button2.Name = "Button2"
Me.Button2.TabIndex = 2
Me.Button2.Text = "Save"
'
'Button3
'
Me.Button3.Location = New System.Drawing.Point(272, 224)
Me.Button3.Name = "Button3"
Me.Button3.TabIndex = 3
Me.Button3.Text = "Load"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(376, 273)
Me.Controls.Add(Me.Button3)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.Button1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Dim value(0) As String
Dim x As Integer
Dim results1 As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
x = x + 1
TextBox1.Text = x
results1 = TextBox1.Text
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
value(0) = Me.TextBox1.Text
Dim fs As New FileStream("c:\test.txt", FileMode.Create, FileAccess.Write)
Dim sw As New StreamWriter(fs)
sw.WriteLine(value(0))
sw.Close()
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim lines() As String = IO.File.readalllines("c:\test.txt")
Me.TextBox1.Text = line(0)
End Sub
End Class
The issue is with regards to button3 which shall retrieve data and place back in text box1.
Can anyone help please.
thanks
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