【转】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
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();
    }
}