TypeConverter to convert byte[] to Bitmap

Question

I have this:

byte[] ar = new byte[ArrayAnsammlung[DurchLaeufer].Length];
ArrayAnsammlung[DurchLaeufer].CopyTo(ar, 0);
TypeConverter tc = TypeDescriptor.GetConverter(typeof(Bitmap));
try
{
    bild = (Bitmap)tc.ConvertFrom(ar);
}
catch (Exception ddd)
{
    Console.WriteLine(ddd.ToString());
}

ar contains bitmap data, ie Blue-Green-Red-Alpha-Blue....

I am trying to convert it into the Bitmap bild. This is what the console shows:

A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll
System.ArgumentException: Invalid Parameter.
   at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData)
   at System.Drawing.ImageConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at System.ComponentModel.TypeConverter.ConvertFrom(Object value)
   at SK.MainWindow.thread() in MainWindow.xaml.cs:Zeile 523.

How do I solve this problem?

Answer 1

Try this :

public static Bitmap BytesToBitmap(byte[] byteArray)
{
    using (MemoryStream ms = new MemoryStream(byteArray))
    {
        Bitmap img = (Bitmap)Image.FromStream(ms);
        return img;
    }
}

Answer 2

I'm not sure why the TypeConverter isn't working, but you can achieve this just as easily with the Bitmap class's Stream constructor:

var memoryStream = new MemoryStream(ar)
var bild = new Bitmap(memoryStream);

Note that as per MSDN , the memoryStream has to stay alive for the lifetime of the object.