Images from Isolated Storage

[Brian]

Hi,

I have a need to display image from Isolated Storage.   The control seems to only want source strings that are part of the project folder structure (eg images/...).  

Is there a way to display images from Isolated Storage in the slide view control?

Is there was way to pass the control a list of image objects?

thanks,

[Georgi]

Hi Brian,

Thank you for contacting us and for your interest in RadControls for Windows Phone.

We are planning to extend the SlideViewPictureSource to provide built-in support for loading pictures from the Isolated Storage as well as to support ImageSource instances directly. We will implement this functionality for the next Service Pack release of the tools - expected within a month.

Please find attached a simple application that demonstrates how your scenario may be currently implemented. The ImageSource passed is loaded from an embedded image but you may plug the logic that loads images from the file system there.

I hope this helps. Let me know if I can assist you further.

Greetings,
Georgi
the Telerik team

[Brian]

Georgi,

Thanks.  With the sample app I got things working.

Brian

[Michael]

Was this ever added to the control?  I figured it out, just like the last guy, but just curious...

[Kiril Stanoev]

Hello Michael,

As it turns out, this feature is not yet implemented in RadSlideView. Nevertheless, this is still in our ToDo list but I cannot commit its availability to a certain date or release. Let me know if you have further questions or comments regarding this topic.

All the best,
Kiril Stanoev
the Telerik team

[Tiago]

I'm trying to do this, but it's not working for me, I got some error when running the sample.

[Tiago]

Now it's working, but I have a lot of Images and take a long time to load. How can I load at background and add dinamically?

[Deyan]

Hello Brian,

You don't need to load all images at once. You need to load only those which are to be visualized.

Otherwise you might consider using background workers?

Regards,
Deyan
Telerik

[Tiago]

 My Applicattion shows a gallery of images like the native on windows phone, how can I achieve this? How can I add the images dinamically?

[Deyan]

Hi Tiago,

You can simply create a source of business objects which contain the Uri of the image which is stored in the Isolated Storage of your application. When you bind RadSlideView to this source, you will load the images on demand and make sure you do not store any reference to them in your ViewModel so that they can be garbage collected when not needed anymore. The following code demonstrates how loading an image from the IsoStore is done:

public ImageSource ImageSource
{
     get
     {
          using (var sourceFile = _storage.OpenFile(isolatedStoragePath, FileMode.Open, FileAccess.Read))
          {
                  BitmapImage bm = new BitmapImage();
                  bm.SetSource(sourceFile);
                  return bm;
          }
     }
}

So you can put a similar property on your data item and use it in the DataTemplate in RadSlideView.

Regards,
Deyan
Telerik

[Tiago]

Deyan,

Can you provide a sample? I can't figure out.

[Todor]

Hi Tiago,

I have attached a sample. First click the AddImage button and select an image from the library, then go to the slide view page and see how the image are loaded one by one. You can use similar approach to display different images.

Regards,
Todor
Telerik

[dev]

hello,
this example works with large images size?

[dev]

your example with this image is very very slow and crashes

use this image:
https://dl.dropboxusercontent.com/u/26312884/2.jpg

[Todor]

Hello,

Make sure that the size of the images that you use is optimized for phone.
Have a look at this article, which recommends usage of images up to 2000 x 2000 pixels.

Regards,
Todor
Telerik

 

 

[Vitalii]

I also had a similar problem with loading and using images. Moreover, there was a problem with memory leak (by default, in wp7, image.OnLoaded event was left unsubscribed after navigating from the page).
I tried several solutions, and i found this one: https://github.com/artem-zinnatullin/jet-image-loader Seems quite stable: i had no issues with it.