如何立即获取文本块的所需宽度？ [英] How to get the textblock's desiredwidth right now?

问题描述

大家好，

我有一个空的TextBlock，我在cs代码中设置了Text，然后我调用了textblock的updatelayout方法，以获得

I have a null TextBlock, and I set the Text in cs code, then I have call the textblock's updatelayout method, in order to get the

DesiredSize.Width，但我失败了。

DesiredSize.Width, but I failed.

那么在现在设置文本后如何获得DesiredSize？

So how can I get the DesiredSize after set the Text right now?

推荐答案

Hi Shirley，

Hi Shirley,

我现在还不知道null-TextBlock应该是什么，但在访问DesiredSize之前调用测量将是最佳选择。

I don't now exactly what a null-TextBlock should be, but calling Measure before accessing DesiredSize would be the way to go.

            TextBlock txt = new TextBlock();
            txt.Text = "Hello";
            txt.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
            double width = txt.DesiredSize.Width;

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