在主窗口（WPF）中单击按钮后，在 UserControl 中触发 function

Question

I have a UserControl inside of my MainWindow . I want to trigger function updateView() inside of my UserControl after clicking on my button in my MainWindow .

How can I achieve this?

Thanks in advance.

MainWindow.xaml

<local :UserControl></local>
<Button x:Name="btn_start" Click="btn_start_Click"></Button>

MainWindow.xaml.cs

private void btn_start_Click(object sender, RoutedEventArgs e) {
  //trigger updateView in UserControl.xaml.cs
}

UserControl.xaml.cs

private void updateView() {
  //start something in UserControl, this is irrelevant
}

Answer 1

One of the easiest way is to assign an instance using x:Name like this

<local:UserControl x:Name="yourusercontrolinstance"/>

And then in usercontrol the function's access specifier must be public, then you can invoke that method via the instance.

yourusercontrolinstance.updateView();