When will Image.fromstream be in the compact framework ??

B

Brent Yax

Does anyone know if there are any plans to include the
system.io MemoryStream or the System.Drawing
Image.fromstream functionality to .Net compact framework ?

Or does anyone know of a way in the .net cvompact
framework to display an image in a compact application
from a string or byte array ?

Thank you !!
 
A

Alex Feinman [MVP]

There is Bitmap(Stream) constructor, which of course works with MemoryStream
 
B

Brent Yax

Basically I have a string that contains entire JPEG images
in ASCII or BINARY. I am looking for a way to take that
string and convert it to an image without having to write
it to a file. I would like to have my compact application
display the image from the variable I already have (or a
converted one, I just don't want to waste resources to
write all there JPEG's to files before viewing them).

Any help would be greatly appreciated!
 
G

Geoff Schwab [MSFT]

G

Guest

Geoff,

This will work if the data in the stream is a bitmap
image, but what if we're trying to construct a jpeg?

-----Original Message-----
Hi Brent,

You should be able to create a stream from the byte array and use the
overloaded constructor of the Bitmap class...

byte[] bytes = new byte[2048];
System.IO.MemoryStream ms = new System.IO.MemoryStream (bytes);
Image im = new Bitmap(ms);


--
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility
http://msdn.microsoft.com/mobility/prodtechinfo/devtools/n etcf/FAQ/default.aspx

This posting is provided "AS IS" with no warranties, and confers no rights.
Brent Yax said:
Does anyone know if there are any plans to include the
system.io MemoryStream or the System.Drawing
Image.fromstream functionality to .Net compact framework ?

Or does anyone know of a way in the .net cvompact
framework to display an image in a compact application
from a string or byte array ?

Thank you !!


.
 
G

Geoff Schwab [MSFT]

Hi Chris,

It will still work, the Bitmap object can handle jpegs. The following code
loads a jpeg into a byte array and displays it...


Image im = null;

private void Form1_Load(object sender, System.EventArgs e)
{
String fullAppName = Assembly.GetExecutingAssembly().GetName().CodeBase;
String fullAppPath = Path.GetDirectoryName(fullAppName);
String testImageName = Path.Combine(fullAppPath, "test.jpg");

FileStream fs = null;
MemoryStream ms = null;

try
{
if (File.Exists(testImageName))
{
fs = new FileStream(testImageName, FileMode.Open);

byte[] bytes = new byte[fs.Length];
fs.Read(bytes, 0, (int)fs.Length);
ms = new MemoryStream(bytes);
im = new Bitmap(ms);
}
}
finally
{
if (fs != null)
fs.Close();
if (ms != null)
ms.Close();
}
}

protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.DrawImage(im, 0, 0);
base.OnPaint (e);
}

Geoff,

This will work if the data in the stream is a bitmap
image, but what if we're trying to construct a jpeg?

-----Original Message-----
Hi Brent,

You should be able to create a stream from the byte array and use the
overloaded constructor of the Bitmap class...

byte[] bytes = new byte[2048];
System.IO.MemoryStream ms = new System.IO.MemoryStream (bytes);
Image im = new Bitmap(ms);


--
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility
http://msdn.microsoft.com/mobility/prodtechinfo/devtools/n etcf/FAQ/default.aspx

This posting is provided "AS IS" with no warranties, and confers no rights.
Brent Yax said:
Does anyone know if there are any plans to include the
system.io MemoryStream or the System.Drawing
Image.fromstream functionality to .Net compact framework ?

Or does anyone know of a way in the .net cvompact
framework to display an image in a compact application
from a string or byte array ?

Thank you !!


.
 
Joined
Apr 11, 2007
Messages
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Geoff Schwab [MSFT] said:
Hi Brent,

You should be able to create a stream from the byte array and use the
overloaded constructor of the Bitmap class...

byte[] bytes = new byte[2048];
System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);
Image im = new Bitmap(ms);

I get an OutOfMemory exception when i create the new Bitmap(ms)
Does anyone have an idea of why?
please help!
 

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