/// <summary>
/// Saves data into the Windows.Storage.ApplicaitonDataContainer object with the App.Apps enum
/// as the key. Note: this will fail if the state to be saved is larger than 8k
/// </summary>
/// <param name="app">The calling app's identity</param>
/// <param name="key">A unique key for the type of memory being saved, handy if the app saves more than one type of state</param>
/// <param name="value">The object which represents the state to be serialized and saved into roaming state</param>
/// <returns>True if the save was successfull, false otherwise</returns>
public static bool SaveRoamingState(App.Apps app, string key, object value)
{
// Because there are many "calc" views but we want the memory to be preserved in between
// all of the views
if (Calc_MainPage.IsCalculator(app))
{
app = App.Apps.Calculator;
}
try
{
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;
string serialized = string.Empty;
List <object> memoryItemsObj = new List <object>();
// Calc specific
if (value is ObservableCollection <Calculator.MemoryItem> )
{
foreach (Calculator.MemoryItem memItem in value as ObservableCollection <Calculator.MemoryItem> )
{
memoryItemsObj.Add(memItem as object);
}
}
else if (value is List <PCalender.Period> )
{
foreach (PCalender.Period period in value as List <PCalender.Period> )
{
memoryItemsObj.Add(period as object);
}
}
// TODO other apps
serialized = JSONCode.JSON.JsonEncode(memoryItemsObj);
// add the value into the roaming state array
if (roamingSettings.Values.ContainsKey(app.ToString() + key))
{
roamingSettings.Values[app.ToString() + key] = serialized;
}
else
{
roamingSettings.Values.Add(app.ToString() + key, serialized);
}
}
catch { return(false); }
return(true);
}