如何将PictureBox.Image保存到文件？

Question

我使用以下内容将jpgImage写入PictureBox.Image.

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

我可以使用以下内容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);
}

但是如何从PictureBox.Image中获取jpgImage字节数组,以便将其写入文件？IOW:如何反转以下内容以从PictureBox.Image获取字节数组？

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

Answer 1

试试这个

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

Answer 2

你可以用,

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

例:

 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);