Avalonia：无法将文本绘制到 DrawingContext

Question

I am developping a project using Avalonia. I used as a workingBase for a graphical editor the following project which allaws to draw lines and rectangles: https://github.com/wieslawsoltes/LineEditor

I am trying to write text in the Avalonia.Media.DrawingContext but i have a NullRefereceException on calling DrawingContext.DrawText (in debbuger, formattedText._platformImpl is null)

public void DrawText(DrawingContext dc, TextShape textShape)
{            
    var brush = new SolidColorBrush(ToColor(textShape.Stroke));
    var point1 = new Point(textShape.TopLeft.X, textShape.TopLeft.Y);
    var typeface = new Typeface("Arial");
    var formattedText = new FormattedText("Hello", typeface, 12, TextAlignment.Left, TextWrapping.NoWrap, Size.Infinity);
    dc.DrawText(brush, point1, formattedText );
}

Answer 1

Did you update the AvaloniaUI NuGet to the last version? the version is old in this archived repo.

A quick search in a more recent example https://github.com/wieslawsoltes/Core2D and you can find DrawText occurences