I try to render some elements on writeable bitmap. It works when rendering textblock but not something else for example rectangle. Why so?
void bm_ImageOpened(object sender, RoutedEventArgs e)
{
WriteableBitmap wbm = new WriteableBitmap((BitmapImage)sender);
TextBlock tb = new TextBlock();
tb.FontSize = 40;
tb.Text = "text";
Rectangle rt = new Rectangle();
rt.Width = 50;
rt.Width = 30;
rt.Fill = new SolidColorBrush(Colors.Red);
TranslateTransform tf = new TranslateTransform();
tf.X = 100;
tf.Y = 100;
wbm.Render(tb, tf); //this works
wbm.Render(rt, tf); //this not
wbmi.Invalidate();
}
You are trying to render a Rectangle
with Height = 0 - you have defined its Width twice.
I suppose it should look like this:
rt.Width = 50;
rt.Height = 30;
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.