以流格式保存图片框中的图像

我想保存一个装在图片框中的图片流。当我保存为png格式时它工作正常但是当我想要以其他格式保存它我得到

GDI +exception中发生了一般错误

我的代码：

Image Img = pictureBox1.Image; byte[] inputImage = new byte[Img.Width * Img.Height]; System.IO.MemoryStream ms = new System.IO.MemoryStream(); ms.Read(inputImage, 0, Img.Width * Img.Height); if (System.Drawing.Imaging.ImageFormat.Jpeg.Equals(Img.RawFormat)) { pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); } else if (System.Drawing.Imaging.ImageFormat.Gif.Equals(Img.RawFormat)) { ms.Seek(0, SeekOrigin.Begin); pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif); } else if (System.Drawing.Imaging.ImageFormat.Png.Equals(Img.RawFormat)) { pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Png); } else if (System.Drawing.Imaging.ImageFormat.Bmp.Equals(Img.RawFormat)) { pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); } 

Answer 1

试试这个方法：

 public Stream ImageToStream(Image image, System.Drawing.Imaging.ImageFormat format) { MemoryStream ms = new MemoryStream(); image.Save(ms, format); return ms; } 

并使用它：

 using(Stream stream = ImageToStream(pictureBox1.Image, System.Drawing.Imaging.ImageFormat.Gif)) { ... }