How can I unattach an element from another element in the XAML tree?
In my Silverlight application, I load all the images I need at application start and store them in a dictionary.
Then as I need them I pick them out of the dictionary and atta开发者_StackOverflow社区ch them in XAML trees etc.
However, I have the problem that if I attach an Image object to a Grid, then want to use that image again, it tells me:
The image element is already a child of another element.
How can I run through my dictionary and "detach all images from parent XAML elements"?
Instead of holding a dictionary of Image
controls hold a dictionary of ImageSource
instead. A single instance of an ImageSource
can be assigned to multiple to Image
controls.
However I suspect that creating an ImageSource on its own will not download the actual file until there is a demand. If that is the case your initialiser would still need to create a list of images that use these images sources and wait for all to indicate they have loaded. Then you could keep a dictionary of ImageSource
and discard the list of actual Image
controls.
Grid parentGrid = VisualTreeHelper.GetParent(image) as Grid;
if (parentGrid != null)
parentGrid.Children.Remove(image);
精彩评论