Byte[]、Image、Bitmap 之间的相互转换

//Image转换Bitmap
//1. Bitmap img = new Bitmap(imgSelect.Image);
//2. Bitmap bmp = (Bitmap)pictureBox1.Image;

/// <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;
}
}

/// <summary>
/// byte[] 转换 Bitmap
/// </summary>
/// <param name="Bytes">byte[]</param>
/// <returns></returns>
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();
}
}

/// <summary>
/// Bitmap转byte[]
/// </summary>
/// <param name="Bitmap">Bitmap</param>
/// <returns></returns>
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();
}
}