Adding System.Drawing.Image to FixedDocument

Question

I have 10 System.Drawing.Image. I need to add them to a FixedDocument. I tried the below code and the fixed document is procuded with all the 10 pages consists of only first image.

FixedDocument doc = new FixedDocument();
BitmapSource[] bmaps = new BitmapSource[10];
System.Drawing.Image[] drawingimages = //I have System.Drawing.Image in a array
for (int i = 0; i < 10; i++)
{

    Page currentPage = this.Pages[i];
    System.Drawing.Image im = drawingimages[i];
    im.Save(i + ".png");
    Stream ms = new MemoryStream();
    im.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
    var decoder = BitmapDecoder.Create(ms, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnDemand);
    ImageSource imgsource = decoder.Frames[0];

    bmaps[i] = imgsource as BitmapSource;
}
foreach (BitmapSource b in bmaps)
{
    PageContent page = new PageContent();
    FixedPage fixedPage = CreateOneFixedPage(b);
    ((IAddChild)page).AddChild(fixedPage);
    doc.Pages.Add(page);
}

Method for CreateOneFixedPage

private FixedPage CreateOneFixedPage(BitmapSource img)
{
    FixedPage f = new FixedPage();
    Image anImage = new Image();
    anImage.BeginInit();
    anImage.Source = img;
    anImage.EndInit();

    f.Children.Add(anImage);
    return f;
}

When I try saving the System.Drawing.Image to the local disk, all the 10 images are saved correctly. What is the mistake in my code here?

What happens if you change the BitmapCacheOption to `BitmapCacheOption.OnLoad` in BitmapDecoder.Create()? — Clemens, Jun 23 '14 at 08:05
And it is not necessary to call BeginInit() and EndInit() on an Image control. — Clemens, Jun 23 '14 at 08:10

Clemens · Answer 1 · 2014-06-23T09:50:30.290

Maybe not an answer to the question, but at least the code below shows a minimal working example. It loads all images from the Sample Pictures folder into a list of System.Drawing.Bitmap objects. Then it converts all list elements to ImageSource and adds each to a FixedDocment page.

Please not that it does not call BeginInit() and EndInit() on the Image controls. Also it sets the PageContent's Child property, instead of calling IAddChild.AddChild().

var bitmaps = new List<System.Drawing.Bitmap>();

foreach (var file in Directory.EnumerateFiles(
    @"C:\Users\Public\Pictures\Sample Pictures", "*.jpg"))
{
    bitmaps.Add(new System.Drawing.Bitmap(file));
}

foreach (var bitmap in bitmaps)
{
    ImageSource imageSource;

    using (var stream = new MemoryStream())
    {
        bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
        stream.Position = 0;
        imageSource = BitmapFrame.Create(stream,
            BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
    }

    var page = new FixedPage();
    page.Children.Add(new Image { Source = imageSource });

    doc.Pages.Add(new PageContent { Child = page });
}

thanks @Clemens... this too fail to draw all the images. just draw only first page 10 times — Uthistran Selvaraj., Jun 23 '14 at 12:26

Adding System.Drawing.Image to FixedDocument

1 Answers1