GDI+中发生一般性错误之图片转化为字节数组

项目中前一次遇到字节数组转化为图片时偶尔出现“GDI+中发生一般性错误”，这回是图片转化为字节数组时出现这种情况。经研究解决办法如下，原代码（出错代码）如下:

1.public static  byte[] imageToByteArray(Image imageIn)
2.{
3.      using (MemoryStream ms = new MemoryStream())
4.      {
5.            if (imageIn != null)
6.            {                  
7.                  imageIn.Save(ms,ImageFormat.Jpeg);                    
8.            }
9.       return ms.ToArray();               
10.     }
11.}

方法一：

1.public static  byte[] imageToByteArray(Image imageIn)
2.{
3.     using (MemoryStream ms = new MemoryStream())
4.     {
5.           if (imageIn != null)
6.           {
7.                  Bitmap t=new Bitmap (imageIn);
8.                  t.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg);                   
9.           }
10.     return ms.ToArray();               
11.     }
12.}

方法二：

1.public static  byte[] imageToByteArray(Image imageIn)
2.{
3.     using (MemoryStream ms = new MemoryStream())
4.     {
5.            if (imageIn != null)
6.            {                  
7.                 Bitmap pic = new Bitmap(imageIn.Width, imageIn.Height);
8.                 Graphics g = Graphics.FromImage(pic);
9.                 g.DrawImage(imageIn, 0, 0, imageIn.Width, imageIn.Height);
10.                 g.Dispose();
11.                 pic.Save(ms, ImageFormat.Jpeg);
12.                 pic.Dispose();                   
13.            }
14.     return ms.ToArray();               
15.      }
16.}