WPF Image赋值的两种方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Collections;
using System.Security.Cryptography;
using System.Windows.Controls;
using System.ComponentModel;
using System.Collections.ObjectModel;
using System.Runtime.InteropServices;

namespace DrawWpf
{
    class FrmClass
    {
        #region 提供两种给Image的Source赋值的方法
        public static System.Windows.Media.ImageBrush GetImageBrushFrom_PResource(System.Drawing.Bitmap imgSrc)
        {
            System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(imgSrc);
            MemoryStream stream = new MemoryStream();

            bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
            System.Windows.Media.ImageBrush imgBrush = new System.Windows.Media.ImageBrush();
            System.Windows.Media.ImageSourceConverter isConverter = new System.Windows.Media.ImageSourceConverter();
            imgBrush.ImageSource = (System.Windows.Media.ImageSource)isConverter.ConvertFrom(stream);

            return imgBrush;
        }

        [DllImport("gdi32.dll", SetLastError = true)]
        private static extern bool DeleteObject(IntPtr hObject);
        //将 Bitmap转换为BitmapSource
        //使用过System.Drawing.Bitmap后一定要用DeleteObject释放掉对象，不然内存不释放，很快系统内存就消耗光了。
        public static System.Windows.Media.ImageSource BitmapToBitmapSource(System.Drawing.Bitmap bitmap)
        {
            IntPtr hBitmap = bitmap.GetHbitmap();
            System.Windows.Media.ImageSource wpfBitmap = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                hBitmap,
                IntPtr.Zero,
                System.Windows.Int32Rect.Empty,
                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
            if (!DeleteObject(hBitmap))//记得要进行内存释放。否则会有内存不足的报错。
            {
                throw new System.ComponentModel.Win32Exception();
            }

            return wpfBitmap;
        }
        #endregion

    }
}

调用方法：

Random rdm = new Random();
this.image1.Source = FrmClass.BitmapToBitmapSource(AppResource.Vote);
this.image2.Source = FrmClass.GetImageBrushFrom_PResource(AppResource.Vote).ImageSource;

参考文献：