resize image

Hello

I have an image with size of 60x100
Now I want to resize it, so it is 100x100, but not resize the image itself. The image itself should still be 60x100, but with 20 pix on the left and 20 pix on the right, this space should be transparent...

How can I do that?

Thanks
RuttensoftAsked:
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Mike TomlinsonHigh School Computer Science, Computer Applications, and Mathematics TeachersCommented:
You can resize an image using code like this...

        Dim fileName As String = "c:\small.jpg"

        Dim fs As New System.IO.FileStream(fileName, IO.FileMode.Open)
        Dim img As Image = Image.FromStream(fs)
        fs.Close()

        Dim bmp As New Bitmap(100, 100)
        Dim g As Graphics = Graphics.FromImage(bmp)
        g.Clear(Color.Transparent)
        g.DrawImage(img, 20, 0)
        g.Dispose()

        img.Dispose()

        bmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg)

But I'm not sure about the Transparent color part.  =\
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RuttensoftAuthor Commented:
Hi

Thanks for the hint

It's interesting, it did not work initially, the bitmap was bigger on the new drawn image.
I've now changed from filestream to direkt Image.Fromfile, and this is working
        Dim fileName As String = "c:\Portrait.png"
        Dim img As Bitmap = New Bitmap(Image.FromFile(fileName))
        Dim bmp As New Bitmap(100, 100)
        Dim g As Graphics = Graphics.FromImage(bmp)
        g.Clear(Color.Transparent)
        g.DrawImage(img, 20, 0)
        g.Dispose()
        img.Dispose()
        bmp.Save("c:\Portraita.png", System.Drawing.Imaging.ImageFormat.Png)

Then saving to png, and the transparent is also working... by jpg not...

But thanks for the hint

Sven

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Mike TomlinsonHigh School Computer Science, Computer Applications, and Mathematics TeachersCommented:
Ok...wonder why it was resizing the image in the original code?

Glad you figured out the rest though...  =)
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RuttensoftAuthor Commented:
Hm yeah I wonder too why that was not working... very strange... but yeah... it now works, thanks for your code, without I would not have figured it out...
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