如何计算WPF中的字体高度？ [英] How to calculate font height in WPF?

问题描述

对于 FontFamily 如何在特定的 FontSize 下以编程方式检索/计算该字体的最大高度范围。 ？

我需要一个值来设置在指定的 FontSize 处显示字体的文本块的高度。这必须以编程方式进行。

我需要一个考虑上行和下行等的值。

为了澄清，我需要整个 FontFamily c>，而不是该字体中的一些示例文本的高度。我不知道什么文字会提前。

解决方案

字体的最大高度范围可以使用其<线性空间属性，这是一个比例数字为字体。这可以用来给出一个行高度，可以容纳特定大小的字体的所有字形。

  FontFamily fontFamily = new FontFamily（Segoe UI）; 
 double fontDpiSize = 16; 
 
 double fontHeight = Math.Ceiling（fontDpiSize * fontFamily.LineSpacing）; 
  

结果：



  22.0 
  

这个数字将包含少量的

For a FontFamily how do I programatically retrieve/calculate the maximum height range for that font at a particular FontSize?

I need a value to set the height of a textblock that will display the font at the specified FontSize - this has to be carried out programatically.

I need a value that will take into consideration ascenders and descenders, etc.

Update

To clarify, I need the maximum height range for the entire FontFamily, not the height of some sample text in that font. I do not know what the text will be in advance.

解决方案

The maximum height range for a font can be calculated using its LineSpacing property which is a proportional figure for the font. This can be used to give a line height which can accommodate all glyphs for that font at a particular size.

    FontFamily fontFamily = new FontFamily("Segoe UI");
    double fontDpiSize = 16;

    double fontHeight = Math.Ceiling(fontDpiSize * fontFamily.LineSpacing);

Result:

   22.0

This figure will contain a small amount of leading which is desirable when needing a height for rows of text (so that ascenders and descenders from adjacent rows of text have spacing).

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