kev/Drawer/UCDraw/WpfSketch/ImageWork.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media.Imaging;

namespace WpfSketch
{
    public class ImageWork
    {
        [DllImport("gdi32")]
        static extern int DeleteObject(IntPtr o);
        /// <summary>
        /// Bitmap->BitmapSource
        /// </summary>
        /// <param name="bitmap"></param>
        /// <returns></returns>
        public static BitmapSource BitMapSourceFromBitmap(Bitmap bitmap)
        {
            IntPtr intPtrl = bitmap.GetHbitmap();
            BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(intPtrl,
                IntPtr.Zero,
                Int32Rect.Empty,
                BitmapSizeOptions.FromEmptyOptions());
            DeleteObject(intPtrl);
            return bitmapSource;
        }

        /// <summary>
        ///  Bitmap --> BitmapImage
        /// </summary>
        /// <param name="bitmap"></param>
        /// <returns></returns>
        public static BitmapImage BitmapToBitmapImage(Bitmap bitmap)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                bitmap.Save(stream, ImageFormat.Bmp);
                stream.Position = 0;
                BitmapImage result = new BitmapImage();
                result.BeginInit();
                result.CacheOption = BitmapCacheOption.OnLoad;
                result.StreamSource = stream;
                result.EndInit();
                result.Freeze();
                return result;
            }
        }
    }
}