C# 合并两张图片

private BitmapSource CombineImage(BitmapSource img1,BitmapSource img2)

{

   var composeImg = new RenderTargetBitmap(img1.PixelWidth,

     img1.PixelHeight+img2.PixelHeight,

     img1.DpiX,

     img1.DpiY,

     PixelFormat.Default );

   var dv = new DrawingVisual();

   using(var dc = dv.RenderOpen())

    {

       dc.DrawImage(img1,new Rect(,,img1.PixelWidth,img1.PixelHeight));

       dc.DrawImage(img1,new Rect(,,img2.PixelWidth,img2.PixelHeight));

       composeImg.Render(dv);

    }

   return composeImg;

}