如何在WPF中使用位图作为图像源

Question

在我的应用程序中，我想使用名为myBitmap的位图在图像框上绘制一个矩形。 问题是如何在C＃Wpf中使用System.Drawing.bitMap作为图像源。

   private void MyRectangle(System.Drawing.Point p1, System.Drawing.Point p2)
    {
        int var1,var2;
        var1 = Convert.ToInt16(image1.Width);
        var2 = Convert.ToInt16(image1.Height);

        System.Drawing.Bitmap myBitmap = new System.Drawing.Bitmap(var1,var2);

        using (Graphics g = Graphics.FromImage(myBitmap))
        {
            g.Clear(Color.LightBlue);
            g.DrawRectangle(new Pen(Brushes.Red),p1.X, p1.Y, p2.X - p1.X, p2.Y - p1.Y);
        }


      // this.image1.Source = myBitmap;

    }

Answer 1

将其转换为BitmapSource，使用BitmapSource作为Image控件的Source。

    public static BitmapSource ConvertToBitmapSource(Bitmap bitmap)
    {
        if (bitmap == null)
            return null;
        //BitmapImage b=new BitmapImage();
        BitmapSource bitSrc = null;
        var hBitmap = IntPtr.Zero;


        try
        {
            hBitmap = bitmap.GetHbitmap();
            bitSrc = Imaging.CreateBitmapSourceFromHBitmap(
                hBitmap,
                IntPtr.Zero,
                Int32Rect.Empty,
                BitmapSizeOptions.FromEmptyOptions());
        }
        catch (Win32Exception)
        {
            bitSrc = null;
        }
        catch (ArgumentException)
        {
            if (hBitmap != IntPtr.Zero)
                DeleteObject(hBitmap);
            hBitmap = IntPtr.Zero;
        }
        catch
        {
            if (hBitmap != IntPtr.Zero)
                DeleteObject(hBitmap);
            bitSrc = null;
            hBitmap = IntPtr.Zero;
        }
        finally
        {
            //bitmap.Dispose();
            if (hBitmap != IntPtr.Zero)
                DeleteObject(hBitmap);
        }
        return bitSrc;
    }


    [DllImport("gdi32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    internal static extern bool DeleteObject(IntPtr hObject);