获得滑块的拇指 [英] Get the Thumb of a Slider

问题描述

我只是想找出一种方法来获取 WPF 中滑块的拇指，如下所示:

I'm just trying to figure out a way to get the thumb of a slider in WPF, something like so:

Slider mySlider = new Slider();

Thumb thumb = slider.Thumb;

现在我知道不可能这么简单；但必须解决这个问题.如果你知道，请告诉我.

Now I know it's not possible as simple as this; but there must be a work around this. Let me know if you know any.

谢谢！

推荐答案

Slider 有一个 TemplatePartAttribute 声明它应该有一个名为 PART_Track 的模板部分，类型为 Track.Track 可以为我们提供对 Thumb 的引用.请记住，可以为 Slider 提供一个没有 Track 的模板，在这种情况下，将没有 Thumb.

Slider has a TemplatePartAttribute that declares it should have a template part called PART_Track of type Track. The Track can give us a reference to the Thumb. Keep in mind that it's possible to give the Slider a template with no Track, in which case there will be no Thumb.

private static Thumb GetThumb(Slider slider)
{
    var track = slider.Template.FindName("PART_Track", slider) as Track;
    return track == null ? null : track.Thumb;
}

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