WPF桌面端开发5-常用技巧

StreamResourceInfo sri = Application.GetResourceStream(new Uri(@"cur\erase.cur", UriKind.Relative));
m_canvas.Cursor = new Cursor(sri.Stream);

m_canvas.Cursor = Cursors.Arrow;

Canvas.SetZIndex(m_erase_img, int.MaxValue);

//100%的时候，DPI是96；这条语句的作用时获取缩放倍数
float factor = Graphics.FromHwnd(IntPtr.Zero).DpiX / 96;

image1.Source = new BitmapImage(new Uri(@"image file path", Urikind.RelativeOrAbsolute));

System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.Open, System.IO.FileAccess.Read);

byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length);
fs.Close(); fs.Dispose();
System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer);
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = ms;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.EndInit();
ms.Dispose();
image1.Source = bitmapImage;

BitmapImage bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.UriSource = new Uri(szPath);//szPath为图片的全路径
bitmapImage.EndInit();
bitmapImage.Freeze();
image1.Source = bitmapImage;

private BitmapImage BitmapToBitmapImage(System.Drawing.Bitmap bitmap)
{
    BitmapImage bitmapImage = new BitmapImage();
    using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
    {
        bitmap.Save(ms, bitmap.RawFormat);
        bitmapImage.BeginInit();
        bitmapImage.StreamSource = ms;
        bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
        bitmapImage.EndInit();
        bitmapImage.Freeze();
    }
    return bitmapImage;
}

image1.Source = BitmapToBitmapImage(bitmap);

BitmapSource bs = Imaging.CreateBitmapSourceFromHBitmap(bmp.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

BitmapSource m = (BitmapSource)image1.Source;

System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(m.PixelWidth, m.PixelHeight, System.Drawing.Imaging.PixelFormat.Format32bppPArgb); 

System.Drawing.Imaging.BitmapData data = bmp.LockBits(
new System.Drawing.Rectangle(System.Drawing.Point.Empty, bmp.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppPArgb); 

m.CopyPixels(Int32Rect.Empty, data.Scan0, data.Height * data.Stride, data.Stride); bmp.UnlockBits(data);