private void OpenMessage(SystemStatusDocument document)
{
// todo: 04 - Open SystemStatus: Navigating to a view in a region with context
// When navigating, you can also supply context so the target view or
// viewmodel can orient their data to something appropriate. In this case,
// we've chosen to pass the SystemStatus id in a name/value pair using and handmade Uri.
//
// The ControllerLogViewModel retrieves this context by implementing the INavigationAware
// interface.
//
NavigationParameters parameters = new NavigationParameters();
parameters.Add(ControllerLogIdKey, document.Id.ToString("N"));
this.regionManager.RequestNavigate(RegionNames.MainContentRegion, new Uri(ControllerLogViewKey + parameters, UriKind.Relative));
}
void INavigationAware.OnNavigatedTo(NavigationContext navigationContext)
{
// todo: 09 - SystemStatus OnNavigatedTo : Accessing navigation context.
// When this view model is navigated to it gains access to the
// NavigationContext to determine if we are composing a new SystemStatus
// or replying to an existing one.
//
// The navigation context offers the context information through
// the Parameters property that is a string/value dictionary
// built using the NavigationParameters class.
//
// In this example, we look for the 'ReplyTo' value to
// determine if we are replying to an SystemStatus and, if so,
// retrieving it's relevant information from the SystemStatus service
// to pre-populate response values.
//
var SystemStatusDocument = new SystemStatusDocument();
var parameters = navigationContext.Parameters;
var replyTo = parameters[ReplyToParameterKey];
Guid replyToId;
if (replyTo != null)
{
if (replyTo is Guid)
{
replyToId = (Guid)replyTo;
}
else
{
replyToId = Guid.Parse(replyTo.ToString());
}
var replyToSystemStatus = this.SystemStatusService.GetSystemStatusDocument(replyToId);
if (replyToSystemStatus != null)
{
SystemStatusDocument.Name = Resources.ResponseMessagePrefix + replyToSystemStatus.Name;
SystemStatusDocument.Message =
Environment.NewLine +
replyToSystemStatus.Message
.Split(Environment.NewLine.ToCharArray())
.Select(l => l.Length > 0 ? Resources.ResponseLinePrefix + l : l)
.Aggregate((l1, l2) => l1 + Environment.NewLine + l2);
}
}
this.SystemStatusDocument = SystemStatusDocument;
// todo: 10 - SystemStatus OnNaviatedTo : Capture the navigation service journal
// You can capture the navigation service or navigation service journal
// to navigate the region you're placed in without having to expressly
// know which region to navigate.
//
// This is useful if you need to navigate 'back' at some point after this
// view model closes.
this.navigationJournal = navigationContext.NavigationService.Journal;
}
public Task SendSystemStatusDocumentAsync(SystemStatusDocument SystemStatus)
{
return(Task.Delay(500));
}
void INavigationAware.OnNavigatedTo(NavigationContext navigationContext)
{
// todo: 15 - Orient to the right context
//
// When this view model is navigated to, it gathers the
// requested SystemStatusId from the navigation context's parameters.
//
// It also captures the navigation Journal so it
// can offer a 'go back' command.
var SystemStatusId = GetRequestedSystemStatusId(navigationContext);
if (SystemStatusId.HasValue)
{
this.SystemStatus = this.SystemStatusService.GetSystemStatusDocument(SystemStatusId.Value);
}
this.navigationJournal = navigationContext.NavigationService.Journal;
}
public Task SendSystemStatusDocumentAsync(SystemStatusDocument SystemStatus)
{
return Task.Delay(500);
}