"Yash" <develope***@gmail.com> schreef in bericht
news:1137739561.357485.11550@f14g2000cwb.googlegroups.com...
> Have used DrawLine() method to draw some lines in the picturebox (sort
> of a barcode) in the picturebox paint event.
> This diagram has to be saved as an image in bmp or tiff format.
> But the problem is that these lines are not recognized as the image of
> the picturebox.
> It shows picturebox.image = nothing.
>
> How do we convert these lines drawn as the image of the picturebox so
> that it can be saved.
>
> Thanks for any help.
>

> Hi, you need to draw to a bitmap's Graphics object:
>
> Dim b As Bitmap = New Bitmap(100,100)
> Dim g As Graphics = Graphics.FromImage(b)
>
> g.DrawLine(Pens.Black, 5,5,50,5)
> g.Dispose()
>
> picturebox1.image = b
> b.Save(...)
>
> Greetz Peter
>
> --
> Programming today is a race between software engineers striving to build
> bigger and better idiot-proof programs, and the Universe trying to produce
> bigger and better idiots. So far, the Universe is winning. (Rich Cook)
>
> "Yash" <develope***@gmail.com> schreef in bericht
> news:1137739561.357485.11550@f14g2000cwb.googlegroups.com...
> > Have used DrawLine() method to draw some lines in the picturebox (sort
> > of a barcode) in the picturebox paint event.
> > This diagram has to be saved as an image in bmp or tiff format.
> > But the problem is that these lines are not recognized as the image of
> > the picturebox.
> > It shows picturebox.image = nothing.
> >
> > How do we convert these lines drawn as the image of the picturebox so
> > that it can be saved.
> >
> > Thanks for any help.
> >

"Yash" <develope***@gmail.com> schreef in bericht
news:1137761134.892145.119190@o13g2000cwo.googlegroups.com...
>
> Thanks Peter
> The saving part is working perfectly.
> The preview also shows the image properly.
>
> But there's another problem
> The image contains Black and colored lines.
> So if we open this image in Paint to change some colors,
> the background shown is black -- which hides the black lines totally.
>
> I tried Bitmap.MakeTransparent but still the same.
> The image is transparent but still the background is black.
> Is this a .NET problem or Paint problem.
> Any idea how to change this.
>
>
> Peter Proost wrote:
> > Hi, you need to draw to a bitmap's Graphics object:
> >
> > Dim b As Bitmap = New Bitmap(100,100)
> > Dim g As Graphics = Graphics.FromImage(b)
> >
> > g.DrawLine(Pens.Black, 5,5,50,5)
> > g.Dispose()
> >
> > picturebox1.image = b
> > b.Save(...)
> >
> > Greetz Peter
> >
> > --
> > Programming today is a race between software engineers striving to build
> > bigger and better idiot-proof programs, and the Universe trying to
produce
> > bigger and better idiots. So far, the Universe is winning. (Rich Cook)
> >
> > "Yash" <develope***@gmail.com> schreef in bericht
> > news:1137739561.357485.11550@f14g2000cwb.googlegroups.com...
> > > Have used DrawLine() method to draw some lines in the picturebox (sort
> > > of a barcode) in the picturebox paint event.
> > > This diagram has to be saved as an image in bmp or tiff format.
> > > But the problem is that these lines are not recognized as the image of
> > > the picturebox.
> > > It shows picturebox.image = nothing.
> > >
> > > How do we convert these lines drawn as the image of the picturebox so
> > > that it can be saved.
> > >
> > > Thanks for any help.
> > >
>