如何从静态 class 更改 UserControl 属性？

Question

我在 MainWindow.xaml 中有 Grid。 Grid填的是我的UserControl（修改Button）.

在静态 class 全局变量中，我有 bool 变量，它在按下 Button 时发生变化。现在我还需要更改此 bool 变量更改的 Grid 背景颜色。

问题是，我无法从 MainWindow.xaml.cs 代码后面的其他地方到达 Grid。

Global.cs:

public static class Globals
    {
        private static bool _player;
        public static bool Player {
            get { return _player; }

            set {
                _player = value;
                Debug.WriteLine(value);
            }
        }
    }

我的UserControl:

public partial class tetrisButton : UserControl
    {
        public tetrisButton()
        {
            InitializeComponent();
            Button.Focusable = false;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if(!Globals.Player)
            {
                Button.Content = new cross();
                Globals.Player = true;
            }
            else
            {
                Button.Content = new circle();
                Globals.Player = false;
            }

        }
    }

Answer 1

如果您不实现 MVVM 模式（或类似模式），您可以只获取包含的网格并设置颜色：

public partial class tetrisButton : UserControl
{
    public tetrisButton()
    {
        InitializeComponent();
        Button.Focusable = false;
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        Grid parent = FindParent<Grid>(this);

        if(!Globals.Player)
        {
            Button.Content = new cross();
            Globals.Player = true;
            parent.Background = Brushes.Blue;
        }
        else
        {
            Button.Content = new circle();
            Globals.Player = false;
            parent.Background = Brushes.Red;
        }

    }

    private T FindParent<T>(DependencyObject child) where T : DependencyObject
    {
         T parent = VisualTreeHelper.GetParent(child) as T;

         if (parent != null)
             return parent;
         else
             return FindParent<T>(parent);
    }
}

Answer 2

您可以使用 Window.GetWindow 方法获取对 UserControl 的父 window 的引用：

private void Button_Click(object sender, RoutedEventArgs e)
{
    MainWindow mainWindow = Window.GetWindow(this) as MainWindow;
    if (!Globals.Player)
    {
        Button.Content = new cross();
        Globals.Player = true;

        if (mainWindow != null)
            mainWindow.grid.Background = Brushes.Green;
    }
    else
    {
        Button.Content = new circle();
        Globals.Player = false;

        if (mainWindow != null)
            mainWindow.grid.Background = Brushes.Red;
    }
}

为了能够访问 Grid，您可以在 MainWindow.xaml 的 XAML 标记中给它一个 x:Name:

<Grid x:Name="grid" ... />

如何从静态 class 更改 UserControl 属性？

How to change UserControl property from static class?

c#

wpf

xaml

user-controls