如何在呈现前在WPF中测量TextBlock的大小? [英] How do I measure the size of a TextBlock in WPF before it is rendered?

问题描述

我有一个WPF DataTemplate，其中有两个TextBlock控件(堆叠)，然后是其他一些元素.由于一些复杂的布局代码，我需要知道两个TextBlock元素的高度，以便绘制一些奇特的连接器线，并排列其他控件等.

I have a WPF DataTemplate with two TextBlock controls (stacked) and then some other elements underneath. Due to some complicated layout code, I need to know the height of the two TextBlock elements so that I can draw some fancy connector lines, and line up other controls, etc.

如果我知道进入TextBlocks的文本，并且知道字体等，是否有某种方法可以计算或测量这些TextBlocks的高度而无需实际呈现它们?

If I know the text that's going into the TextBlocks, and I know the font, etc., is there some way I can compute or measure the height of these TextBlocks without actually rendering them?

推荐答案

我认为调用 UIElement.DesiredSize 属性.有关更多信息，请检查提供的MSDN链接.

I think it should be sufficient to call the UIElement.Measure(Size) method and subsequently check the UIElement.DesiredSize property. For more information, check the provided MSDN links.

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