WPF从代码后面设置命名样式元素？

I have a user control that applies a style to button, with the style containing a ControlTemplate section. Within the ControlTemplate, there are various UI elements such as an Ellipse and a Path.

我有一个用户控件，它将样式应用于按钮，样式包含ControlTemplate部分。在ControlTemplate中，有各种UI元素，如Ellipse和Path。

If I give those elements -- the Ellipse and Path -- a name with x:Name, can I access them from code behind?

如果我给这些元素 - Ellipse和Path - 一个带x：Name的名称，我可以从后面的代码中访问它们吗？

It appears the style's Ellipse and Path are not visible because I get a compile error (C#).

看起来样式的Ellipse和Path不可见，因为我收到编译错误（C＃）。

Am I going about this the wrong way?

我是以错误的方式来做这件事的吗？

1 个解决方案

#1

Because a template can be instantiated multiple times, it's not possible to bind a generated member via x:Name. Instead, you have to find the named element within the template applied to a control.

由于模板可以多次实例化，因此无法通过x：Name绑定生成的成员。相反，您必须在应用于控件的模板中找到命名元素。

Given simplified XAML:

给出简化的XAML：

<ControlTemplate x:Key="MyTemplate">
    <Ellipse x:Name="MyEllipse" />
</ControlTemplate>

You would do something like this:

你会做这样的事情：

var template = (ControlTemplate)FindResource("MyTemplate");

template.FindName("MyEllipse", myControl);

Or even more simply:

甚至更简单：

var ellipse = (Ellipse)myControl.Template.FindName("MyEllipse", myControl);

You can read about FrameworkTemplate.FindName.

您可以阅读FrameworkTemplate.FindName。

Some examples and discussion here, here and here.

这里和这里有一些例子和讨论。

#1