Windows 10 Can't save to text file with visual c# universal app

[Kenne76]

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I can't save any changes to the text file settings.txt , but reading the file works.

The code is

private async void LedShow_Loaded(object sender, RoutedEventArgs e)
{
var path = @"settings.txt";
var folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
var file = await folder.GetFileAsync(path);
var lines = await Windows.Storage.FileIO.ReadLinesAsync(file);
sliderDelay.Value = Convert.ToInt32(lines[0]);
textBlockDelayValue.Text = lines[0] + " seconds";
buttonSave.IsEnabled = false;
}

and the error message is

An exception of type 'System.UnauthorizedAccessException' occurred in System.Private.CoreLib.dll but was not handled in user code
Access is denied. (Excep_FromHResult 0x80070005) occurred

Can someone help me?

 

[Neemobeer]

Yeah, you probably can't write to the program installation directory without elevated rights. To that point you shouldn't be saving settings to the program directory, either create a directory in C:\ProgramData if you want the settings to be available for all users or save into your user appdata\local\<programname> directory

 

[AceInfinity]

Yeah, you probably can't write to the program installation directory without elevated rights. To that point you shouldn't be saving settings to the program directory, either create a directory in C:\ProgramData if you want the settings to be available for all users or save into your user appdata\local\<programname> directory

This is different though, the classes he is using are for Windows Apps.

@OP : I would suggest you follow this guide instead for app settings: Store and retrieve settings and other app data

Use the ApplicationDataContainer.Values property for simple app settings - ApplicationDataContainer.Values | values property - Windows app development