如何从WPF中的非窗口类获取控制?

如果控件位于应用程序的主窗口中,则很可能需要将其强制转换为适当的类型。例如,如果您的“主窗口”命名为 Window1 (默认命名),可以执行以下操作:

Window1 myWindow = Application.Current.MainWindow as Window1;
if (myWindow != null)
{
     Button myButton = myWindow.button1; // Use your control here...
     myButton.IsEnabled = true; // Do something with the control here...
}

另一个与上面Reed的回复非常相似的例子是,这里有一个事件处理程序(app.xaml.cs),它更新状态栏(mainwindow.xaml)中显示的文本:

private void Control_GotFocus(object sender, RoutedEventArgs e)
{
    // Do not select text for read-only text boxes.
    if ((sender is TextBox) && (!(sender as TextBox).IsReadOnly))
    {
        (sender as TextBox).SelectAll();
    }

    // Update status bar text to display control tag value.
    (Application.Current.MainWindow.FindName("statusBarTextBlock")
        as TextBlock).Text = (sender as Control).Tag.ToString();
}