/// <summary>
/// Executes the action.
/// </summary>
/// <param name="sender">The <see cref="System.Object"/> that is passed to the action by the behavior. Generally this is <seealso cref="Microsoft.Xaml.Interactivity.IBehavior.AssociatedObject"/> or a target object.</param>
/// <param name="parameter">The value of this parameter is determined by the caller.</param>
/// <returns>True if the navigation to the specified page is successful; else false.</returns>
public object Execute(object sender, object parameter)
{
if (string.IsNullOrEmpty(this.TargetPage))
{
return(false);
}
IXamlMetadataProvider metadataProvider = Application.Current as IXamlMetadataProvider;
if (metadataProvider == null)
{
// This will happen if there are no XAML files in the project other than App.xaml.
// The markup compiler doesn't bother implementing IXamlMetadataProvider on the app
// in that case.
return(false);
}
IXamlType xamlType = metadataProvider.GetXamlType(this.TargetPage);
if (xamlType == null)
{
return(false);
}
INavigate navigateElement = Window.Current.Content as INavigate;
DependencyObject senderObject = sender as DependencyObject;
// If the sender wasn't an INavigate, then keep looking up the tree from the
// root we were given for another INavigate.
while (senderObject != null && navigateElement == null)
{
navigateElement = senderObject as INavigate;
if (navigateElement == null)
{
senderObject = this._visualTreeHelper.GetParent(senderObject);
}
}
if (navigateElement == null)
{
return(false);
}
Frame frame = navigateElement as Frame;
if (frame != null)
{
return(frame.Navigate(xamlType.UnderlyingType, this.Parameter ?? parameter));
}
else
{
return(navigateElement.Navigate(xamlType.UnderlyingType));
}
}
/// <summary>
/// Executes the action.
/// </summary>
/// <param name="sender">The <see cref="System.Object"/> that is passed to the action by the behavior. Generally this is <seealso cref="Microsoft.Xaml.Interactivity.IBehavior.AssociatedObject"/> or a target object.</param>
/// <param name="parameter">The value of this parameter is determined by the caller.</param>
/// <returns>True if the navigation to the specified page is successful; else false.</returns>
public object Execute(object sender, object parameter)
{
if (string.IsNullOrEmpty(this.TargetPage))
{
return(false);
}
IXamlMetadataProvider metadataProvider = (IXamlMetadataProvider)Application.Current;
IXamlType xamlType = metadataProvider.GetXamlType(this.TargetPage);
if (xamlType == null)
{
return(false);
}
INavigate navigateElement = Window.Current.Content as INavigate;
DependencyObject senderObject = sender as DependencyObject;
// If the sender wasn't an INavigate, then keep looking up the tree from the
// root we were given for another INavigate.
while (senderObject != null && navigateElement == null)
{
navigateElement = sender as INavigate;
if (navigateElement == null)
{
senderObject = VisualTreeHelper.GetParent(senderObject);
}
}
if (navigateElement == null)
{
return(false);
}
Frame frame = navigateElement as Frame;
if (frame != null)
{
return(frame.Navigate(xamlType.UnderlyingType, this.Parameter ?? parameter));
}
else
{
return(navigateElement.Navigate(xamlType.UnderlyingType));
}
}
public object Execute(object sender, object parameter)
{
if (null == Page)
{
return(false);
}
if (Frame == null)
{
throw new NullReferenceException($"{nameof(NavToPageAction)}.{nameof(Frame)} is required.");
}
var navs = Locator.WindowWrapper.Instances.SelectMany(x => x.NavigationServices);
var nav = navs.First(x => (x.FrameFacade as IFrameFacadeInternal).Frame == Frame);
if (nav == null)
{
throw new NullReferenceException($"Cannot find NavigationService for {Frame.ToString()}.");
}
IXamlMetadataProvider metadataProvider = Application.Current as IXamlMetadataProvider;
if (metadataProvider == null)
{
throw new Exception($"1 Cannot find type {Page}");
}
IXamlType xamlType = metadataProvider.GetXamlType(Page);
if (xamlType == null)
{
throw new Exception($"2 Cannot find type {Page}");
}
Type type = xamlType.UnderlyingType;
if (type == null)
{
throw new Exception($"3 Cannot find type {Page}");
}
nav.Navigate(type, Parameter, InfoOverride);
return(null);
}
public object Execute(object sender, object parameter)
{
if (null == Page)
{
return(false);
}
if (Frame == null)
{
throw new NullReferenceException($"{nameof(NavToPageAction)}.{nameof(Frame)} is required.");
}
var nav = NavigationService.GetForFrame(Frame);
if (nav == null)
{
throw new NullReferenceException($"Cannot find NavigationService for {Frame.ToString()}.");
}
IXamlMetadataProvider metadataProvider = Application.Current as IXamlMetadataProvider;
if (metadataProvider == null)
{
throw new Exception($"1 Cannot find type {Page}");
}
IXamlType xamlType = metadataProvider.GetXamlType(Page);
if (xamlType == null)
{
throw new Exception($"2 Cannot find type {Page}");
}
Type type = xamlType.UnderlyingType;
if (type == null)
{
throw new Exception($"3 Cannot find type {Page}");
}
nav.Navigate(type, Parameter, InfoOverride);
return(null);
}
private void EnsureMetadataProviders()
{
if (_metadataProviders != null)
{
return;
}
_metadataProviders = new List <IXamlMetadataProvider>();
foreach (Type type in Assembly.GetExecutingAssembly().GetTypes())
{
if (type == this.GetType())
{
continue;
}
if (typeof(IXamlMetadataProvider).IsAssignableFrom(type))
{
IXamlMetadataProvider provider = (IXamlMetadataProvider)Activator.CreateInstance(type);
_metadataProviders.Add(provider);
}
}
}
