In the WebAnnotationExample sample application you have provided, there is function

public int GetFrameCount(string filename)

{

int frameCount = -1;

using (FileStream ms = new FileStream(_baseDocsDir + filename, FileMode.Open))

{

frameCount = Atalasoft.Imaging.Codec.Tiff.TiffFile.GetPageCount(ms);

}

return frameCount;

}

 How we can do this, if we have JPEG image in place here?

Since JPEG's don't support multiple pages, the answer would be 1 if the image existed.

 

...
                if (Session["Atalasoft_File"].ToString().EndsWith("PDF"))
                {
                    frameCount = Atalasoft.Imaging.Codec.Pdf.???.GetPageCount(ms);
                }

...

How we can do this, if we have PDF image in place here?