Load Picturebox Image From Memory?

Question

I can't seem to figure out how to load a pictureBox image from a bitmap in memory. Is it possible or do I have to create temp file for the bitmap?

Possible duplicate: http://stackoverflow.com/questions/743549 — dtb, Mar 29 '10 at 19:44
It is the opposite, loading the image from a file, that is unusual. Use the Bitmap class. — Hans Passant, Mar 29 '10 at 19:49

score 24 · Accepted Answer · answered Mar 29 '10 at 19:49

24

What format is the image in memory?

If you have an actual Bitmap object, just assign it to the PictureBox, as suggested by dtb:

pictureBox.Image = bitmap;

If you have the image as a series of bytes held in a stream, you'll need to load the image from the stream:

var image = Image.FromStream(stream);
pictureBox.Image = image;

If you instead have a windows GDI handle to the bitmap, use

var image = Image.FromHbitmap(handle);
pictureBox.Image = image;

Essentially, it's hard to answer your question with more than suggestions when you haven't told us what format the Bitmap you have is held in.

answered Mar 29 '10 at 19:49

Bevan

I have received `System.ArgumentException: Parameter is not valid.` exception when i tried to load image from stream. – Balagurunathan Marimuthu Mar 04 '17 at 12:13
@BalagurunathanMarimuthu I suggest posting your own question to get assistance with your particular context; it's difficult to assist with so little information. – Bevan Mar 07 '17 at 18:07

score 4 · Answer 2 · answered Mar 29 '10 at 19:48

4

You can create a Bitmap from a MemoryStream:

pictureBox.Image = new Bitmap(new MemoryStream(byteArray));

answered Mar 29 '10 at 19:48

SLaks

at what point is it safe to explicitly Dispose of the MemoryStream ? Would : using(var ms = new MemorySteam(byteArray)){ pictureBox.Image = new Bitmap(ms) }; be safe ? – Moe Sisko Oct 15 '12 at 23:20
@MoeSisko: You don't really need to dispose a MemoryStream; they don't have unmanaged resoruces. (just a `byte[]`) But, yes; that should be fine. – SLaks Oct 15 '12 at 23:21
parameter missing here `Dim picture As Byte() = GetBytes(ListView2.Items(index).SubItems(8).Text) Dim converter As New ImageConverter() PictureBox1.Image = DirectCast(converter.ConvertFrom(picture), Image)` – nouman arshad Dec 27 '15 at 21:51

score 2 · Answer 3 · answered Mar 29 '10 at 19:44

2

pictureBox.Image = bitmap;

answered Mar 29 '10 at 19:44

dtb

parameter missing here `Dim picture As Byte() = GetBytes(ListView2.Items(index).SubItems(8).Text) Dim converter As New ImageConverter() PictureBox1.Image = DirectCast(converter.ConvertFrom(picture), Image)` – nouman arshad Dec 27 '15 at 21:51

3 Answers3