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read and write a string into a txt file.

Aiysha
Aiysha asked
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Last Modified: 2013-12-26
I want a vb command that saves values from text box or a string into a txt file and also reads that line back into vb code.

Thank you.
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High School Computer Science, Computer Applications, Digital Design, and Mathematics Teacher
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Top Expert 2009
Commented:
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From your question, it sounds like you might just want to save settings.  Idle_Mind's way is one, and you get to specify the file name.  Another way is to save it in the registry, using something like

Sub GetSettings()
    txtMyTextField.Text = GetSetting(App.EXEName, "Settings", "MyTextField", "")
End Sub

Sub SaveSettings()
   Call SaveSetting(App.EXEName, "Settings", "MyTextField", txtMyTextField.Text)
End Sub

and then call GetSettings from your form load or wherever, and SaveSettings from the change event or the form close event or wherever.

If you want to specify the file name, you could use the windows API calls GetPrivateProfileString and WritePrivateProfileString, which will create and read a separate .INI file that you specify.

Commented:
Instead using a text file for storing some data you can
use the registry very easily to store short informations :


This sample creates the following key in the registry :
HKCU\Software\VB and VBA Program Settings\Project1\Settings

Under "HKCU\...\Project\" it creates the additional key "Settings" with the value
"Hey,I love Microsoft"




Private Sub Form_Load()
zzz = "Hey,I love Microsoft"

'S A V I N G :
'= = = = = = = =
'Set some data to registry
SaveSetting App.Title, "Settings", "firmName", zzz '  "App.Title" contains the variable  "Project1"


'R E A D I N G :
'= = = = = = = =
'read some data from registry
qqq = GetSetting(App.Title, "Settings", "firmName", "sorry, but the registry entry 'firmName' doesn't exist")
MsgBox qqq
' RESULT : a message box pops up with the text - - -> Hey,I love Microsoft
End Sub




'Annotation:
'The last parameter of the GetSetting() function allows to supply a DEFAULT value
'if the requested registry entry is not found...

'Counter = GetSetting(App.Title, "Settings", "Counter", "-1")
'If Counter = "-1" Then        ' there was no value found in registry

Commented:
This sample stores the textbox content
(Text1.text) in the registry.

-Everytimes when you restart the vb program, you will see
the text1.text from your  'last session' .



Needs:
======
1 Textbox
1 Form


Private Sub Form_Load()
Text1.Width = 3000

If zz1 = "-1" Then
    Text1 = "Please enter some text"
Else
    Text1 = zz1
End If


End Sub



Private Sub Text1_Change()
zz9 'store text1 content
End Sub



Function zz1() As String   ' read
    zz1 = GetSetting(App.Title, "Settings", "textbox1", "-1")
End Function



Sub zz9()    ' save
      SaveSetting App.Title, "Settings", "textbox1", Text1.Text
End Sub

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