How to drawstring on canvas

Question

Hi

In windows form application we have Graphics.DrawString Method but how to get the equivalent in uwp ?

Thanks

Answer 1

Hello, Welcome to Microsoft Q&A,

How to drawstring on canvas

For this scenario, you could use Win2d DrawText to draw string in the CanvasVirtualControl. And the following is sample code that you could refer.

Xaml

<Canvas x:Name="MyCanvas"> </Canvas>

Code Behind

private void Page_Loaded(object sender, RoutedEventArgs e)
{
    CanvasVirtualControl canvasVirtualControl = new CanvasVirtualControl();
    canvasVirtualControl.Width = 1000;
    canvasVirtualControl.Height = 1000;
    MyCanvas.Children.Add(canvasVirtualControl);
    Canvas.SetLeft(canvasVirtualControl, 0);
    Canvas.SetTop(canvasVirtualControl, 0);
    canvasVirtualControl.RegionsInvalidated += CanvasVirtualControl_RegionsInvalidated;
}

private void CanvasVirtualControl_RegionsInvalidated(CanvasVirtualControl sender, CanvasRegionsInvalidatedEventArgs args)
{
    CanvasDrawingSession drawingSession;
    Rect rect = new Rect(args.InvalidatedRegions[0].Left, args.InvalidatedRegions[0].Top, args.InvalidatedRegions[0].Width, args.InvalidatedRegions[0].Height);

    using (drawingSession = sender.CreateDrawingSession(rect))
    {
        drawingSession.DrawText("hello",0,0,Colors.Red);
    }
}