how to save a graphics into a jpg file

Now the graphics are painted in a form and i want to save the
graphics into a jpg file. Which class will implement that

what about ImageConverter class should i first transform the
graphics into a image. By the way, i am not sure whether the image
class will be useful.

thank you

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how to save a graphics into a jpg file

Diego_VB
Hi,
did you ever find a solution for this

I'm asking because I'm trying the exact same thing right now - with no luck.

thanks,
Ed.
kbickerton
Daniel,
should this stop my big black box error

thanks,
Ed.
vbn3wb1e

Bitmap bmp = new Bitmap(700, 900);
using (Graphics g = Graphics.FromImage(bmp))
{
g.DrawLine(Pens.Red, 0, 0, 100, 100);
}
bmp.Save(...);
Bud Pritchard
Hi,
I still get a big black box, here's some of the code I'm using:

first my toolbar button for print:

if (e.Button == this.tbPrintForm2) // print the validated version of the doc

{
_bmp = (Bitmap)_currFormImage;
pd2 = new PrintDocument();
pd2.PrintPage += new PrintPageEventHandler(this.DrawPanel);
PrintDialog myDialog = new PrintDialog();
myDialog.Document = pd2;
if(myDialog.ShowDialog() == DialogResult.OK)
{
pd2.Print();
}
}

now the draw panel code - print event triggerred
Note gr is being set here.

private void DrawPanel(Object sender, PrintPageEventArgs e)
{
int resX = _bmp.Height;
int resY= _bmp.Width;
int leftOffsetVal = pd2.PrinterSettings.DefaultPageSettings.Margins.Left /5;
e.Graphics.DrawImage(_bmp,0,0, new Rectangle(0,0,_bmp.Width, _bmp.Height), GraphicsUnit.Pixel);
gr = e.Graphics;
float scale = resX/resY;
paintDynamicComponentsGraphics(leftOffsetVal,gr);
}

now of to the paint dynamic:
tb is a text box.

private void paintDynamicComponentsGraphics(int border, Graphics gr)
{
...
..
.
.
.
.

gr.DrawString(tb.Text, tb.Font, new SolidBrush(tb.ForeColor), (float)border + (float)field.LeftX, (float)border + (float)field.LeftY + ((float)field.Height-(float)gr.MeasureString("a", tb.Font).Height)/2.0f, new StringFormat());
.
.
.
.
.

Bitmap outputBitMap = new Bitmap(700,900);
gr.DrawImage(outputBitMap,0,0,700,900);
outputBitMap.Save("c:\\temp\\image1.jpg",ImageFormat.Jpeg);
}

the end

the result is a jpg in the correct location but a big black rectangle - no background image or anything.

thanks in advance for this, it's truly appreciated.
Ed.
Shek Leung
The image class has a Save method:

image.Save("filename.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
Sergio Vasquez
because I'm trying:

Bitmap outputBitMap = new Bitmap(700,900,gr);
outputBitMap.Save("c:\\temp\\image1.jpg",ImageFormat.Jpeg)

and it's just giving me a big black rectangle.

thanks again,
Ed.
Vitali Lesheniuk
Hi xudeutsch,
forgive the seemingly boundless ineptitude but can you post an example of this.

thanks in advance,
Ed.
tdhers
a graphics is painted in a bitmap object.
and use Bitmap.save() method.
Rathna Kumar
because i also get it out from a clip of another program, i am asking that person later.
From your code, i think "gr"(stand for a graphics ) has no content, first you can paint the "gr"
with the content you want to show in jpg,
then "gr.DrawImage(outputBitMap);
outputBitMap.Save("c:\\temp\\image1.jpg",ImageFormat.Jpeg;"

i must to say i am trying to understand it further, maybe someone else can explain us here better..
how to save a graphics into a jpg file

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