public static object?TryFindViewService(this IViewServiceHost thisControl, Type viewServiceType)
{
// Search within ViewServices collection
var actParent = thisControl;
object?result = null;
while ((actParent != null) &&
(result == null))
{
foreach (var actViewService in actParent.ViewServices)
{
if (actViewService == null)
{
continue;
}
// ReSharper disable once UseMethodIsInstanceOfType
if (!viewServiceType.IsAssignableFrom(actViewService.GetType()))
{
continue;
}
result = actViewService;
}
actParent = actParent.ParentViewServiceHost;
}
if (result != null)
{
return(result);
}
// Search for default view services
actParent = thisControl;
while ((actParent != null) &&
(result == null))
{
result = actParent.TryGetDefaultViewService(viewServiceType);
actParent = actParent.ParentViewServiceHost;
}
return(result);
}
public static T FindViewService <T>(this IViewServiceHost thisControl)
where T : class
{
return((T)TryFindViewService(thisControl, typeof(T)) !);
}
public ViewServiceContainer(IViewServiceHost owner)
{
this.Owner = owner;
this.ViewServices.CollectionChanged += this.OnViewServices_CollectionChanged;
}