Byte[]、Image、Bitmap 之间的相互转换

/// <summary>
/// 将图片Image转换成Byte[]
/// </summary>
/// <param name="Image">image对象</param>
/// <param name="imageFormat">后缀名</param>
/// <returns></returns>
public static byte[] ImageToBytes(Image Image, System.Drawing.Imaging.ImageFormat imageFormat)
{

if (Image == null) { return null; }

byte[] data = null;

using (MemoryStream ms= new MemoryStream())
{

using (Bitmap Bitmap = new Bitmap(Image))
{

Bitmap.Save(ms, imageFormat);

ms.Position = 0;

data = new byte[ms.Length];

ms.Read(data, 0, Convert.ToInt32(ms.Length));

ms.Flush();

}

}

return data;

}

/// <summary>
/// byte[]转换成Image
/// </summary>
/// <param name="byteArrayIn">二进制图片流</param>
/// <returns>Image</returns>
public static System.Drawing.Image byteArrayToImage(byte[] byteArrayIn)
{
if (byteArrayIn == null)
return null;
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArrayIn))
{
System.Drawing.Image returnImage = System.Drawing.Image.FromStream(ms);
ms.Flush();
return returnImage;
}
}

//Image转换Bitmap

1. Bitmap img = new Bitmap(imgSelect.Image);

2. Bitmap bmp = (Bitmap)pictureBox1.Image;

//Bitmap转换成Image

using System.IO;

private static System.Windows.Controls.Image Bitmap2Image(System.Drawing.Bitmap Bi)
{
MemoryStream ms = new MemoryStream();
Bi.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
BitmapImage bImage = new BitmapImage();
bImage.BeginInit();
bImage.StreamSource = new MemoryStream(ms.ToArray());
bImage.EndInit();
ms.Dispose();
Bi.Dispose();
System.Windows.Controls.Image i = new System.Windows.Controls.Image();
i.Source = bImage;
return i ;
}

//byte[] 转换 Bitmap
public static Bitmap BytesToBitmap(byte[] Bytes)
{
MemoryStream stream = null;
try
{
stream = new MemoryStream(Bytes);
return new Bitmap((Image)new Bitmap(stream));
}
catch (ArgumentNullException ex)
{
throw ex;
}
catch (ArgumentException ex)
{
throw ex;
}
finally
{
stream.Close();
}
}

//Bitmap转byte[]
public static byte[] BitmapToBytes(Bitmap Bitmap)
{
MemoryStream ms = null;
try
{
ms = new MemoryStream();
Bitmap.Save(ms, Bitmap.RawFormat);
byte[] byteImage = new Byte[ms.Length];
byteImage = ms.ToArray();
return byteImage;
}
catch (ArgumentNullException ex)
{
throw ex;
}
finally
{
ms.Close();
}
}
}