Saving ObservableCollection to isolated storage

Question

I am in the process of making a note taking app, in which the user can create, edit and delete notes. Once the app is closed all data should be stored in isolated storage. I have created a note class which sets some properties below:

    public string strNoteName { get; set; }
    public string strCreated { get; set; }
    public string strModified { get; set; }
    public bool boolIsProtected { get; set; }
    public string strNoteImage { get; set; }
    public string strNoteSubject { get; set; }
    public string strTextContent { get; set; }

These are put into an ObservableCollection<note> GetnotesRecord() which can be displayed in the Mainpage using a listbox. On touch there is an event handler for SelectionChange which passes the item to the editpage where items such as strTextContent and strNoteName can be edited.

After adding all this, I want the data to be saved to isolated storage so it can be loaded next time the app runs.

Is it possible to save an ObservableCollection<note>? If yes, how can it be retrieved from the isolated storage when I'm starting the app later?

Answer 1

Steps :-

If you collection is big then convert your ObservalbleCollection to a xml string and store it using IsolatedStorageSettings class as a Key-Value pair.

If it is not :- then you can IsolatedStorageSettings directly like this

IsolatedStorageSettings Store { get { return IsolatedStorageSettings.ApplicationSettings; } }

    public T GetValue<T>(string key)
    {
        return (T)Store[key];
    }

    public void SetValue(string token, object value)
    {
        Store.Add(token, value);
        Store.Save();
    }

Usage :-

    ObservableCollection<Note> objCollection = new ObservableCollection<Note>()
    {
        new Note(){Checkbool = false,Checkme = "sd"},
        new Note(){Checkbool = false,Checkme = "sd1"},
        new Note(){Checkbool = false,Checkme = "sd2"}
    };

    // you can also make check whether values are present or 
    // by checking the key in storage.
    var isContainKey = Store.Contains("set")

    // save key value pair
    SetValue("set", objCollection); 

    // extract key value pair
    var value = GetValue<ObservableCollection<Note>>("set");