在WPF中测量文本

FormattedText formattedText = new FormattedText(
    "测试文本",
    CultureInfo.CurrentCulture,
    FlowDirection.LeftToRight,
    new Typeface("Arial"),
    16,
    Brushes.Black);

double textWidth = formattedText.Width;
double textHeight = formattedText.Height;

TextBlock textBlock = new TextBlock();
textBlock.Text = "测试文本";
textBlock.FontFamily = new FontFamily("Arial");
textBlock.FontSize = 16;

double textWidth = textBlock.ActualWidth;
double textHeight = textBlock.ActualHeight;

FormattedText formattedText = new FormattedText(
    "测试文本",
    CultureInfo.CurrentCulture,
    FlowDirection.LeftToRight,
    new Typeface("Arial"),
    16,
    Brushes.Black);

GlyphRun glyphRun = formattedText.BuildGlyphRun();

double textWidth = glyphRun.Width;
double textHeight = glyphRun.Height;