reading and writing to a text file

[mcapone888]

Hi everyone,

I am new to VB.net, and have only played around with VB6 as a hobby. I know this is not the best way to write and read from a file, but this is what I used in the past, and it worked great for me.

I am trying to write some variables to a simple text file, and then be able to use load them again at a later time. In VB 6 I used:

 

for saving (writing):

Open App.Path & "\file.txt" For Output As #1

Write #1, String1, String2, Integer1

Close #1

 

for loading (reading):

Open App.Path & "\file.txt" For Input As #1

Input #1, String1, String2, Integer1

Close #1

 

This wrote the three variables to a simple text file found in the same location as the startup path of the program. How can I recreate this same simple code for a VB.Net windows application? If possible, please let me know the easiest way to do this, even if it is not the correct or best method possible. Thanks!!

 

Michael

[quwiltw]

Have you searched this forum for "write text file"? there are a number of good examples for this already.

[mcapone888]

Public Class frmReadWriteTest
   Inherits System.Windows.Forms.Form

   Dim Save1, Save2, Save3 As String
Windows Form Designer generated code


   Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
       
       Save1 = txtOne.Text
       Save2 = txtTwo.Text
       Save3 = txtThree.Text

       FileOpen(1, "test.txt", OpenMode.Output)
       WriteLine(1, Save1, Save2, Save3)
       FileClose(1)
   End Sub

   Private Sub btnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoad.Click

       FileOpen(1, "test.txt", OpenMode.Input)
       Input(1, Save1)
       Input(1, Save2)
       Input(1, Save3)
       FileClose(1)

       txtFour.Text = Save1
       txtFive.Text = Save2
       txtSix.Text = Save3
   End Sub


End Class

Edited March 16, 2003 by divil

[quwiltw]

I'm not sure what your point was behind posting your code. I asked if you'd searched the forum yet. There are a number of good examples for doing this the .NET-way posted.

[bpayne111]

Search MSDN for "Streams"

that will show you the new cool way to write to files

[spearchucker]

arbitrary

 

I just wrote an arbitrary number of lines to my text file. Now, how can I read them in? I know what each line will contain, but I dont know how many lines. Is there some sort of a peek function to see if there are any more lines available to read?

[quwiltw]

See if this helps you get started...

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemiostreamreaderclassreadlinetopic.asp