private void DoNavigate(Uri source, Action <NavigationResult> navigationCallback, NavigationParameters navigationParameters)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (this.Region == null)
{
throw new InvalidOperationException(Application.Current.FindResource("NavigationServiceHasNoRegion").ToString());
}
this.currentNavigationContext = new NavigationContext(this, source, navigationParameters);
// starts querying the active views
RequestCanNavigateFromOnCurrentlyActiveView(
this.currentNavigationContext,
navigationCallback,
this.Region.ActiveViews.ToArray(),
0);
}
/// <summary>
/// Initiates navigation to the specified target.
/// </summary>
/// <param name="target">The target.</param>
/// <param name="navigationCallback">A callback to execute when the navigation request is completed.</param>
/// <param name="navigationParameters">The navigation parameters specific to the navigation request.</param>
public void RequestNavigate(Uri target, Action <NavigationResult> navigationCallback, NavigationParameters navigationParameters)
{
if (navigationCallback == null)
{
throw new ArgumentNullException("navigationCallback");
}
try
{
this.DoNavigate(target, navigationCallback, navigationParameters);
}
catch (Exception e)
{
this.NotifyNavigationFailed(new NavigationContext(this, target), navigationCallback, e);
}
}
