如何在WPF Xaml中访问控件引用？

myButton.Content = "New button text";

<TextBlock Text="{Binding ElementName=myButton, Path=Content}" />

Button myButton = (Button)FindName("myButton");
myButton.Content = "New button text";

public static T FindVisualChild<T>(DependencyObject obj) where T : DependencyObject
{
    for (int i = 0; i< VisualTreeHelper.GetChildrenCount(obj); i++)
    {
        DependencyObject child = VisualTreeHelper.GetChild(obj, i);
        if (child is T)
            return (T)child;

        T childOfChild = FindVisualChild<T>(child);
        if (childOfChild != null)
            return childOfChild;
    }
    return null;
}

Button myButton = FindVisualChild<Button>(this);
myButton.Content = "New button text";