How do I create a Stream object from a Bitmap

[Bill Fuller]

I have a need to write a Bitmap to a Stream, but get an error message on all
my attempts. I am doing something like the following:

Stream _appImage;

public frmCustomerFeed back(Bitmap bm)
{
InitializeCompo nent();

bm.Save(_appIma ge, System.Drawing. Imaging.ImageFo rmat.Jpeg); <== this
fails
//bm.Save("testim g.jpg", System.Drawing. Imaging.ImageFo rmat.Jpeg); <==
this works
ugPictureBox.Im age = bm;
}

Any suggestions?

[Peter Duniho]

Re: How do I create a Stream object from a Bitmap

On Mon, 03 Nov 2008 16:33:27 -0800, Bill Fuller <someone@nospam .comwrote:

I have a need to write a Bitmap to a Stream, but get an error message on
all
my attempts. I am doing something like the following:
>
Stream _appImage;
>
public frmCustomerFeed back(Bitmap bm)
{
InitializeCompo nent();
>
bm.Save(_appIma ge, System.Drawing. Imaging.ImageFo rmat.Jpeg); <==
this fails
//bm.Save("testim g.jpg", System.Drawing. Imaging.ImageFo rmat.Jpeg);
<== this works
ugPictureBox.Im age = bm;
}
>
Any suggestions?

Yes. Initialize your _appImage variable so that it actually references an
instance of the Stream class.

Just as the documentation promises, if you pass "null" for that argument
(or the second, for that matter), you'll get an ArgumentNullExc eption.

So: don't pass null. How can the method know what Stream to write to if
you don't pass it a valid reference to one?

Pete

[Bill Fuller]

Re: How do I create a Stream object from a Bitmap

Never mind... found my problem.

MemoryStream _appImage = new MemoryStream();


"Bill Fuller" <someone@nospam .comwrote in message
news:%23GVH1ThP JHA.4008@TK2MSF TNGP02.phx.gbl. ..

>I have a need to write a Bitmap to a Stream, but get an error message on
>all my attempts. I am doing something like the following:
>
Stream _appImage;
>
public frmCustomerFeed back(Bitmap bm)
{
InitializeCompo nent();
>
bm.Save(_appIma ge, System.Drawing. Imaging.ImageFo rmat.Jpeg); <== this
fails
//bm.Save("testim g.jpg", System.Drawing. Imaging.ImageFo rmat.Jpeg); <==
this works
ugPictureBox.Im age = bm;
}
>
Any suggestions?
>