Retrieving the image name from a powerpoint file

I need to retrieve the image file name from an image in a pptx file. I already got the stream from the image but i didn't got the name of the image file... Here is my code:

private static Stream GetParagraphImage(DocumentFormat.OpenXml.Presentation.Picture     picture, DocumentFormat.OpenXml.Packaging.PresentationDocument presentation, ref     MyProject.Import.Office.PowerPoint.Presentation.Paragraph paragraph)
{
        // Getting the image id
        var imageId = picture.BlipFill.Blip.Embed.Value;
        // Getting the stream of the image
        var part = apresentacao.PresentationPart.GetPartById(idImagem);
        var stream = part.GetStream();
        // Getting the image name
        var imageName = GetImageName(imageId, presentation);  
/* Here i need a method that returns the image file name based on the id of the image and开发者_JS百科 the presentation object.*/
        // Setting my custom object ImageName property
        paragraph.ImageName = imageName;
        // Returning the stream
        return stream;
}

Anyone knows how i can accomplish this ? Thanks!!

There are in fact two file names for a picture/image in a pptx file:

If you need the file name of the image as it is embedded in the pptx file you can use the following function:

public static string GetEmbeddedFileName(ImagePart part)
{
  return part.Uri.ToString();
}

If you need the orignial file system name of your image you can use the following function:

public static string GetOriginalFileSystemName(DocumentFormat.OpenXml.Presentation.Picture pic)
{
  return pic.NonVisualPictureProperties.NonVisualDrawingProperties.Description;
}

BEGIN EDIT:

Here is a complete code example:

using (var doc = PresentationDocument.Open(fileName, false))
{
  var presentation = doc.PresentationPart.Presentation;

  foreach (SlideId slide_id in presentation.SlideIdList)
  {
    SlidePart slide_part = doc.PresentationPart.GetPartById(slide_id.RelationshipId) as SlidePart;
    if (slide_part == null || slide_part.Slide == null)
        continue;
    Slide slide = slide_part.Slide;

    foreach (var pic in slide.Descendants<DocumentFormat.OpenXml.Presentation.Picture>())
    {
      string id = pic.NonVisualPictureProperties.NonVisualDrawingProperties.Id;
      string desc = pic.NonVisualPictureProperties.NonVisualDrawingProperties.Description;

      Console.Out.WriteLine(desc);
    }
  }
}

END EDIT

Hope, this helps.