Tech Talk A software developer on all things tech, and then some

5May/110

Create an Image or Bitmap Image from a Byte[], and a Byte[] from an image.

Have a filestream set up and need to produce an Image or Bitmap image from the blob? No worries, there are a few ways in doing this. First off, let me show you how to create the image or bitmap image from the byte array.

To an image specifically.

public Image byteArrayToImage(byte[] Inbyte)
{
    MemoryStream mStream = new MemoryStream(Inbyte);
    Image _image = Image.FromStream(mStream );
    return _image ;
}

To a bitmap specifically.

public BitmapImage byteArrayToBitmap(byte[] Inbyte)
{
    MemoryStream mStream = new MemoryStream(Inbyte);
    BitmapImage _bitmap = new BitmapImage();
    _bitmap .BeginInit();
    _bitmap .StreamSource = mStream ;
    _bitmap .EndInit();
    return _bitmap ;
}       

Both.

public void WriteImageToFile(byte[] Inbyte, String FileName)
{	
    FileStream aFile = new FileStream(FileName, FileMode.Create);

    //Write from the Inbyte byte array to the file
    aFile.Seek(0, SeekOrigin.Begin);
    aFile.Write(Inbyte, 0, Inbyte.Length);
    aFile.Close();
}

Now you are wondering how to get the image in the byte[] in the first place. Well that part is very simple. Here is a function that will read in the image and return the byte array for you

public void ImageTobyteArray(string Filepath)
{
    System.IO.File.ReadAllBytes(Filepath);
}
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