如何保存PictureBox.图像文件

Question

我使用以下代码将jpgImage写入PictureBox.Image.

var jpgImage = new Byte[jpgImageSize];
...
pictureBox.Image = new Bitmap(new MemoryStream(jpgImage));

，我可以使用下面的代码将字节数组写入文件

using (var bw =
    new BinaryWriter(File.Open(filename, FileMode.Create,
        FileAccess.Write, FileShare.None)))
{
    bw.Write(jpgImage);
}

但是我如何从PictureBox获得jpgImage字节数组。这样我就可以把它写入文件了?我如何反转以下从PictureBox.Image获得字节数组?

pictureBox.Image = new Bitmap(new MemoryStream(jpgImage));

Answer 1

试试这个

pictureBox.Image.Save(@"Path",ImageFormat.Jpeg);

Answer 2

您可以使用

pictureBox.Image.Save(stream,System.Drawing.Imaging.ImageFormat.Jpeg);

的例子:

 System.IO.MemoryStream ms = new System.IO.MemoryStream();
 pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
 byte[] ar = new byte[ms.Length];
 ms.Write(ar, 0, ar.Length);

Answer 3

使用下面的代码保存到自定义位置

using (SaveFileDialog saveFileDialog = new SaveFileDialog() {Filter = @"PNG|*.png"})
                    {
                        if (saveFileDialog.ShowDialog() == DialogResult.OK)
                        {
                            pictureBox.Image.Save(saveFileDialog.FileName);
                        }
                    }