Question

I store the directory path of a folder in Properties.Settings.Default.Temporary and I allow the user to change this value and other settings using a PropertyGrid.

When the user decides to reset the Settings, I would like to change Properties.Settings.Default.Temporary to the value of System.IO.Path.GetTempPath() by using Properties.Settings.Default.Reset()

I know about System.Configuration.DefaultSettingValueAttribute. Something like this:

[global::System.Configuration.DefaultSettingValueAttribute(System.IO.Path.GetTempPath())]

does not work.

I also read Storing default value in Application settings (C#), which described a related problem, but I wonder if there is a way to solve my problem in the way described above.

Answer 1

I just had an idea for a workaround myself:

    [global::System.Configuration.UserScopedSettingAttribute()]
    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
    [global::System.Configuration.DefaultSettingValueAttribute(null)]
    public string TemporaryDirectory
    {
        get
        {
            if (this["TemporaryDirectory"] == null)
            {
                return System.IO.Path.GetTempPath();
            }
            return ((string)this["TemporaryDirectory"]);
        }
        set
        {
            if (System.IO.Directory.Exists(value) == false)
            {
                throw new System.IO.DirectoryNotFoundException("Directory does not exist.");
            }
            this["TemporaryDirectory"] = value;
        }
    }

I don’t know, if this has any side effects, but so far it seems to work. I am sorry that I had this idea shortly after posting. I should’ve thought about the problem a bit longer.