如何计算 WPF TextBlock 已知字体大小和字符的宽度? [英] How to calculate WPF TextBlock width for its known font size and characters?

问题描述

假设我有 TextBlock 文本 "Some Text" 和 字体大小 10.0.

Let's say I have TextBlock with text "Some Text" and font size 10.0.

如何计算合适的TextBlock 宽度?

推荐答案

使用 FormattedText 类.

我在我的代码中做了一个辅助函数:

I made a helper function in my code:

private Size MeasureString(string candidate)
{
    var formattedText = new FormattedText(
        candidate,
        CultureInfo.CurrentCulture,
        FlowDirection.LeftToRight,
        new Typeface(this.textBlock.FontFamily, this.textBlock.FontStyle, this.textBlock.FontWeight, this.textBlock.FontStretch),
        this.textBlock.FontSize,
        Brushes.Black,
        new NumberSubstitution(),
        1);

    return new Size(formattedText.Width, formattedText.Height);
}

它返回可用于 WPF 布局的与设备无关的像素.

It returns device-independent pixels that can be used in WPF layout.

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