Select Page of TIFF Image
Environment
| Product | Progress® Telerik® Reporting |
Description
By default, the PictureBox report item will render the first page of the TIFF image file. This can be a problem when a multipage TIFF file is used as there would be no way to display any of the other pages.
Solution
In order to render a certain page from the TIFF file, a custom user function that selects that image is required. The function may look as bellow:
public static Image GetPageFromTiff(string path, int page)
{
Image tiffImage;
List<Image> images;
tiffImage = Image.FromFile(path);
images = GetAllPages(tiffImage);
return images[page];
}
private static List<Image> GetAllPages(Image multiPageImage)
{
List<Image> images = new List<Image>();
int count = multiPageImage.GetFrameCount(FrameDimension.Page);
for (int i = 0; i < count; i++)
{
multiPageImage.SelectActiveFrame(FrameDimension.Page, i);
MemoryStream byteStream = new MemoryStream();
multiPageImage.Save(byteStream, ImageFormat.Tiff);
images.Add(Image.FromStream(byteStream));
byteStream.Dispose();
}
return images;
}
Then, in the Report Designer, to call the function we need to provide a path to the TIFF image and the desired page to be displayed, for example:
= Namespace.Class.GetPageFromTiff("c:\temp\test.tif", 1)
The indexing is 0-based so when we give a 1 as the second argument, the second page's image will be rendered.