public void RestoreState(IDictionary <string, object> storedState)
{
object stateAsString;
Dictionary <string, object> collections;
if (storedState.TryGetValue("DataServiceState", out stateAsString))
{
var dsState = DataServiceState.Deserialize((string)stateAsString);
this._context = dsState.Context as OratorEntities;
collections = dsState.RootCollections;
if (collections != null)
{
if (collections.ContainsKey("Events"))
{
this.Events = collections["Events"] as DataServiceCollection <Event>;
if (collections.ContainsKey("Sessions"))
{
this.Sessions = collections["Sessions"] as DataServiceCollection <Session>;
if (collections.ContainsKey("Speakers"))
{
this.Speakers = collections["Speakers"] as DataServiceCollection <SessionSpeaker>;
}
if (collections.ContainsKey("SessionFiles"))
{
this.SessionFiles = collections["SessionFiles"] as DataServiceCollection <SessionFile>;
}
}
}
}
// Restore entity properties from the stored URI.
_context.TryGetEntity <Session>(storedState["CurrentSession"] as Uri, out _currentSession);
_context.TryGetEntity <Event>(storedState["CurrentEvent"] as Uri, out _currentEvent);
_context.TryGetEntity <SessionSpeaker>(storedState["SingleSpeaker"] as Uri, out _singleSpeaker);
// Restore other non-entity properties.
this.TotalSessionCount = (int)storedState["TotalSessionCount"];
this.Message = (string)storedState["Message"];
this.CountMessage = (string)storedState["CountMessage"];
this.QueryInfo = (QueryHelper)storedState["QueryInfo"];
this.SessionCategories = (List <string>)storedState["SessionCategories"];
this.SessionDates = (List <string>)storedState["SessionDates"];
this.SessionTracks = (List <string>)storedState["SessionTracks"];
}
}
void Deserialize(string contextDataString)
{
var contextData = DataServiceState.Deserialize(contextDataString);
context = contextData.Context as OrlandoCodeCampEntities;
var collections = contextData.RootCollections;
Announcements = GetCollection <Announcement>(collections, "announcements");
Sessions = GetCollection <Session>(collections, "sessions");
Tracks = GetCollection <Track>(collections, "tracks");
Speakers = GetCollection <Person>(collections, "speakers");
Sponsors = GetCollection <Sponsor>(collections, "sponsors");
Timeslots = GetCollection <Timeslot>(collections, "timeslots");
IsDataLoaded = true;
}
// Restores the view model state from the supplied state serialization.
public void RestoreState(string appState)
{
// Create a dictionary to hold any stored binding collections.
Dictionary <string, object> collections;
if (!string.IsNullOrEmpty(appState))
{
// Deserialize the DataServiceState object.
DataServiceState state
= DataServiceState.Deserialize(appState);
// Restore the context and binding collections.
var context = state.Context as NorthwindEntities;
collections = state.RootCollections;
// Get the binding collection of Customer objects.
DataServiceCollection <Customer> customers
= collections["Customers"] as DataServiceCollection <Customer>;
// Initialize the application with stored data.
App.ViewModel.LoadData(context, customers);
}
}
// Restores the view model state from the supplied state dictionary.
public void RestoreState(IDictionary <string, object> dictionary)
{
// Create a dictionary to hold any stored binding collections.
object titles;
object stateAsString;
if (dictionary.TryGetValue("DataServiceState", out stateAsString))
{
// Rehydrate the DataServiceState object from the serialization.
DataServiceState state =
DataServiceState.Deserialize((string)stateAsString);
if (state.RootCollections.TryGetValue("Titles", out titles))
{
// Initialize the application with data from the DataServiceState.
App.ViewModel.LoadData((NetflixCatalog)state.Context,
(DataServiceCollection <Title>)titles);
// Restore other view model data.
_currentPage = (int)dictionary["CurrentPage"];
_totalCount = (int)dictionary["TotalCount"];
}
}
}