Items not showing properly

[Oliver]

Hi,

I'm using Telerik V2012.1.325.35 and I have a strange behaviour with my RadCarousel component.
 
In our application we have a RadGridView and beside de RadGridView we have a RadTabControl with 2 TabItems, in the first TabItem I have a RichTextBox and in the second RadTabItem I have a RadCarousel. When I click on one Item in my GridView, I load 2 images on disk, for both image, I create and object of type "InterDependencyImage" (definition at the end) and I added to my carousel using the following piece of code:

    var img = pPdf as InterDependencyImage;
    img.Image = new Image();
    img.Image.Source = img.Frame;    
    theCarousel.Items.Add(img);

When the loading images process ended, I click on my RadTabItem containing my RadCarousel and I can see my 2 images. The first one is perfectly visible but the 2nd one is blank!!! If I scroll the blank image outside the RadCarousel and I scroll it back into the view portion of the RadCarousel, I can see it perfectly now!!!

I'm I missing something???

Thank's

    public class InterDependencyImage
    {
        #region Contructors.
        public InterDependencyImage()
        {
            No = 1;
            TotalImages = 1;
            Notes = "";
            Type = "";
            PrimaryImageGUID = Guid.Empty;           
        }
        #endregion

        #region Public properties.
        public int No { get; set; }
        public int TotalImages { get; set; }
        public Image Image { get; set; }
        public BitmapFrame Frame { get; set; }
        public string Notes { get; set; }
        public string Type { get; set; }
        public Guid PrimaryImageGUID { get; set; }
        #endregion
    }

[Dimitrina]

Hi,

May I ask you to test with our latest version - 2012.2.912.35 and let me know if you still experience such problems. What is the result if you do not use a TabControl but place the RadCarousel outside it. It is not clear if the TabControl is connected to the GridView, or it is separately defined - would you please clarify?

Kind regards,
Didie
the Telerik team

[Oliver]

Hi Didie,

In my Window, I have a RadGridView in the upper part and in the lower part I have my RadTabControl. The RadTabControl is not connected to the grid. When data is visible in the RadGridView, the user can click on a row, from that, I start a thread to get the row detail from the server (data and images), when images arrived, I insert it in the RadCarousel, one by one. The problem occur only when I have more than one image.

Thank's

[Dimitrina]

Hello,

This is indeed strange behaviour. Would you please isolate the issue in a demo project and send it to us?

Regards,
Didie
the Telerik team

[Oliver]

Hi Didie,

I found the problem but I need precision :)

The problem come from the fact that we use a third party library to convert a PDF document into a stream and then, after, we use the class "TiffBitmapDecoder" to convert the stream into an array of BitmapFrame and then we pass the array to the caroussel. For a PDF document with 1 page, was had no problem at all but when we had PDF documents with more than one pages, all pages greather than 1 appear blank into the carousel.

The following piece of code in bold was the issue:
TiffBitmapDecoder tiffDecoder = new TiffBitmapDecoder(tiffStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
imgs = tiffDecoder.Frames;

Then I replaced the piece of code by the one in bold to solve my problem:
TiffBitmapDecoder tiffDecoder = new TiffBitmapDecoder(tiffStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
imgs = tiffDecoder.Frames; 

The difference between the changes are related to caching issue, can you provide me informations why those changes are necessary and if it's normal? I would like to know if those changes cannot broke something else in my application.

Thank's