使用代码更改矩形边距

Question

我想通过按下键来移动我的矩形，但目前我收到错误消息：

“System.ArgumentException”类型的未处理异常发生在 WindowsBase.dll

附加信息：“Auto,Auto,0,0”不是 属性“边距”。

我的代码如下：

private void Window_KeyDown(object sender, KeyEventArgs e)
        {
            double x = Canvas.GetLeft(rect);
            double y = Canvas.GetTop(rect);

            if (e.Key == Key.D)
            {
                rect.Margin = new Thickness(x+5, y, 0, 0);
            }
            else if (e.Key == Key.A)
            {
                rect.Margin = new Thickness(x-5, y, 0, 0);
            }
            Thread.Sleep(100);
        }

Answer 1

试试

private void Window_KeyDown(object sender, KeyEventArgs e)
    {
        double x = rect.Margin.Left;
        double y = rect.Margin.Top;
        if (e.Key == Key.D)
        {
            rect.Margin = new Thickness(x+5, y, 0, 0);
        }
        else if (e.Key == Key.A)
        {
            rect.Margin = new Thickness(x-5, y, 0, 0);
        }
        Thread.Sleep(100);
    }
}