Question

There is a windows form application which i am trying to convert to wpf , but when i override onPaintBackground on main window using

protected override void OnPaintBackground(PaintEventArgs pevent)

There is error

no suitable method found to override

so what is the alternative for onPaintBackground in wpf ?.

Answer 1

In general you shouldn’t ‘paint’ in WPF. Because it can be very slow to continuously recreate the objects (Pens, brushes, shapes).

You can override the OnRender method, example from this page:

protected override void OnRender(DrawingContext dc)
{
    SolidColorBrush mySolidColorBrush  = new SolidColorBrush();
    mySolidColorBrush.Color = Colors.LimeGreen;
    Pen myPen = new Pen(Brushes.Blue, 10);
    Rect myRect = new Rect(0, 0, 500, 500);
    dc.DrawRectangle(mySolidColorBrush, myPen, myRect);
}