Trying to save image after resizing but it is saved black image

Question

Please help me in fixing my problem in saving the resized image. Here is the code:

protected void Resize(object sender, EventArgs e)
{
    img3.Src = img1.Src;

    img3.Width = Int32.Parse(imgWidth.Text);
    img3.Height = Int32.Parse(imgHeight.Text);

    Bitmap b = new Bitmap(Int32.Parse(imgWidth.Text), Int32.Parse(imgHeight.Text));
    Graphics gr = Graphics.FromImage(b);

    b.Save(Server.MapPath(img1.Src + "resized.png"));
}

score 0 · Accepted Answer · edited May 23 '17 at 12:22

The following line:

Bitmap b = new Bitmap(Int32.Parse(imgWidth.Text),Int32.Parse(imgHeight.Text));

Constructs an empty image with the selected width and height. You should use the Bitmap costructor that takes an image and Size parameter

Bitmap b = new Bitmap(yourImage, new Size(yourWidth, yourheight));

If you want a high quality resize, check out this answer here:

Resize an image C#

Trying to save image after resizing but it is saved black image

1 Answers1