Load a WPF BitmapImage from a System.Drawing.Bitmap

Question

I have an instance of a System.Drawing.Bitmap and would like to make it available to my WPF app in the form of a System.Windows.Media.Imaging.BitmapImage<

Answer 1

My take on this built from a number of resources. https://stackoverflow.com/a/7035036 https://stackoverflow.com/a/1470182/360211

using System;
using System.Drawing;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using System.Security;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Media.Imaging;
using Microsoft.Win32.SafeHandles;

namespace WpfHelpers
{
    public static class BitmapToBitmapSource
    {
        public static BitmapSource ToBitmapSource(this Bitmap source)
        {
            using (var handle = new SafeHBitmapHandle(source))
            {
                return Imaging.CreateBitmapSourceFromHBitmap(handle.DangerousGetHandle(),
                    IntPtr.Zero, Int32Rect.Empty,
                    BitmapSizeOptions.FromEmptyOptions());
            }
        }

        [DllImport("gdi32")]
        private static extern int DeleteObject(IntPtr o);

        private sealed class SafeHBitmapHandle : SafeHandleZeroOrMinusOneIsInvalid
        {
            [SecurityCritical]
            public SafeHBitmapHandle(Bitmap bitmap)
                : base(true)
            {
                SetHandle(bitmap.GetHbitmap());
            }

            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
            protected override bool ReleaseHandle()
            {
                return DeleteObject(handle) > 0;
            }
        }
    }
}