WPF MVVM对象绑定。 [英] WPF MVVM Object binding.

问题描述

我遇到了一个问题。

我在我的xaml上使用了一些外部控件，我需要调用他的函数

我的视图模型。

i在我的视图模型中从他的类型创建了一个属性，我想绑定它们。

如何绑定一个对象？



示例：我在xaml有一个文本块，我希望在代码中调用他的焦点（）



我该怎么办？



谢谢，Ofer。

Hi, I encountered a problem.
i'm working with some outer control at my xaml, and i need to call to his functions from
my view model.
i created a property from his type at my view model and i want to bind them.
how can i bind an object?

Example: i have a Text Block at xaml and i want in code to call to his focus()

how can i do it?

Thanks, Ofer.

推荐答案

你不能轻易做你想做的事 - 设置专注于一个特定的控件一般都是MVVM的痛苦。



这也违背了MVVM的全部意义 - 虚拟机应该不会真正知道焦点将会是什么设置完毕。



如果你确实需要这样做，你可以使用附加属性 - 参见 here [ ^ ]



但是，根据您的应用程序，在某些事件或其他事件中将焦点设置在代码后面可能会更简单。

You can't do what you are trying easily - setting the focus to a particular control is a pain in MVVM generally.

It also goes against what MVVM is all about - the VM shouldn't really know focus is going to be set at all.

If you do need to do it, you can use attached properties - see here[^]

But, depending on your application, it may be simpler to set the focus in code behind on some event or other.

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