以编程方式发出命令 [英] Programmatically raise a command

问题描述

我有一个按钮:

<Button x:Name="MyButton" Command="SomeCommand"/>

是否有一种从源头执行命令的方法?调用单击按钮无济于事:

Is there a way to execute the command from source? Calling the click on the button does not help:

MyButton.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));

我的意思是-这确实引发了事件，但没有引发命令.是否有与此 RaiseEvent 类似的东西，仅用于Command?如果没有-如何实例化 ExecutedRoutedEventArgs ?有可能吗?

I mean - this does raise the event, but it does not raise the command. Is there something similar to this RaiseEvent but just for Command? If there is not - how can I instantiate ExecutedRoutedEventArgs? Is it possible?

最后-请不要告诉我如何避免调用命令.

Lastly - please do not tell me how to avoid calling the command.

推荐答案

不确定您的意思是

if(MyButton.Command != null){
    MyButton.Command.Execute(null);
}

在c#6及更高版本(由eirik提出)中，有一种缩写形式:

with c#6 and later (as proposed by eirik) there is the short form:

Mybutton.Command?.Execute(null);

更新
正如@Benjol所建议的那样，在某些情况下可能需要提供按钮的 CommandParameter -property值，并且可以将其添加而不是 null 视为默认值.模式:

Update
As proposed by @Benjol, providing the button's CommandParameter-property value can be required in some situations and the addition of it instead of null may be considered to be used as the default pattern:

Mybutton.Command?.Execute(MyButton.CommandParameter);

这篇关于以编程方式发出命令的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！