Save and reload variable when file opened

Getting Started
1

Hello,
How to store a variable when the software is closed and, reload is when the software is re-opened?
Thanks!

2

I use an SQLite database for that. Save all the settings into it and reload at app startup.

3

(Xojo 2019r3.1 Desktop Project)

i use a Settings class

using app open & close event

Sub Close() Handles Close Settings.Save End Sub Sub Open() Handles Open Settings.Load End Sub
Property

Protected Property SoundEnabled as Boolean = True
Method for Filename

[code]Public Function File() as FolderItem
Var f As FolderItem = SpecialFolder.ApplicationData.Child(“YourAppName”)

If f.Exists = False Then f.CreateFolder

Return f.Child(“Settings.txt”)

End Function
[/code]
Save
it use a dictionary to json

[code]Public Sub Save()
Var d As New Dictionary

d.Value(“SoundEnabled”) = SoundEnabled

Var j As JSONItem

j = d
j.Compact = False

Var st As TextOutputStream = TextOutputStream.Create(File)

st.Write(j.ToString)

st.Close
End Sub
[/code]
Load
read json

[code]Public Sub Load()
Var f As FolderItem = File

If f.Exists = False Then Return

Var st As TextInputStream = TextInputStream.Open(File)

Var j As New JSONItem(st.ReadAll)

st.Close

SoundEnabled = j.Lookup(“SoundEnabled”, True)

End Sub
[/code]

4

Hello Markus, thank you! I got the app 'close, ‘open’, property and method. However, cannot seem to figure out add ‘Public sub save’ and ‘Publ;ic Sub load’. Are these classes? Thanks Naren

5

that is named shared method. because i need only a single instance i used it this way.
i newer apps i use JSONItem direct without Dictionary.
with .Lookup("…",value) you can set default values if key value pair not exists, that is useful if you add properties later.

6

Thank you! Appreciate your guidance. I Will work on this. Thanks