// Return a collection of key-value pairs to store in the application state.
public List <KeyValuePair <string, object> > SaveState()
{
if (App.ViewModel.IsDataLoaded)
{
List <KeyValuePair <string, object> > stateList
= new List <KeyValuePair <string, object> >();
// Create a new dictionary to store binding collections.
var collections = new Dictionary <string, object>();
// Add the current Titles binding collection.
collections["Titles"] = App.ViewModel.Titles;
// Store the current context and binding collections in the view model state.
stateList.Add(new KeyValuePair <string, object>(
"DataServiceState", DataServiceState.Serialize(_context, collections)));
stateList.Add(new KeyValuePair <string, object>("CurrentPage", CurrentPage));
stateList.Add(new KeyValuePair <string, object>("TotalCount", TotalCount));
return(stateList);
}
else
{
return(null);
}
}
string Serialize()
{
if (!IsDataLoaded)
{
return(null);
}
var collections = new Dictionary <string, object>();
collections["announcements"] = Announcements;
collections["sessions"] = Sessions;
collections["tracks"] = Tracks;
collections["speakers"] = Speakers;
collections["sponsors"] = Sponsors;
collections["timeslots"] = Timeslots;
return(DataServiceState.Serialize(context, collections));
}
// Return a string serialization of the application state.
public string SaveState()
{
if (App.ViewModel.IsDataLoaded)
{
// Create a new dictionary to store binding collections.
var collections = new Dictionary <string, object>();
// Add the current Customers binding collection.
collections["Customers"] = Customers;
// Return the serialized context and binding collections.
return(DataServiceState.Serialize(_context, collections));
}
else
{
return(string.Empty);
}
}
public List <KeyValuePair <string, object> > SaveState()
{
Uri storageUri;
List <KeyValuePair <string, object> > stateList = new List <KeyValuePair <string, object> >();
Dictionary <string, object> collections = new Dictionary <string, object>();
if (this.Events != null)
{
collections.Add("Events", this.Events);
if (this.Sessions != null)
{
collections.Add("Sessions", this.Sessions);
if (this.Speakers != null)
{
collections.Add("Speakers", this.Speakers);
}
if (this.SessionFiles != null)
{
collections.Add("SessionFiles", this.SessionFiles);
}
}
}
// Add the DataServiceState to the collection.
stateList.Add(new KeyValuePair <string, object>("DataServiceState", DataServiceState.Serialize(_context, collections)));
// We can't store entities directly, so store the URI instead.
if (CurrentSession != null && _context.TryGetUri(CurrentSession, out storageUri))
{
// Store the URI of the CurrentSession.
stateList.Add(new KeyValuePair <string, object>("CurrentSession", storageUri));
}
if (CurrentEvent != null && _context.TryGetUri(CurrentEvent, out storageUri))
{
// Store the URI of the CurrentEvent.
stateList.Add(new KeyValuePair <string, object>("CurrentEvent", storageUri));
}
if (SingleSpeaker != null && _context.TryGetUri(SingleSpeaker, out storageUri))
{
// Store the URI of the Speaker.
stateList.Add(new KeyValuePair <string, object>("SingleSpeaker", storageUri));
}
// Add other non-entity binding properties to the collection.
stateList.Add(new KeyValuePair <string, object>("TotalSessionCount", TotalSessionCount));
stateList.Add(new KeyValuePair <string, object>("Message", Message));
stateList.Add(new KeyValuePair <string, object>("CountMessage", CountMessage));
stateList.Add(new KeyValuePair <string, object>("QueryInfo", QueryInfo));
stateList.Add(new KeyValuePair <string, object>("SessionCategories", SessionCategories));
stateList.Add(new KeyValuePair <string, object>("SessionDates", SessionDates));
stateList.Add(new KeyValuePair <string, object>("SessionLevels", SessionLevels));
stateList.Add(new KeyValuePair <string, object>("SessionTracks", SessionTracks));
return(stateList);
}