如何在WPF中设置子窗口的位置而不是所有者窗口的中心[已解决！]

<Window x:Class="YourNamespace.ChildWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Child Window" Height="300" Width="400">
    <!-- 子窗口内容 -->
</Window>

private void ShowChildWindow()
{
    ChildWindow childWindow = new ChildWindow();
    
    // 设置子窗口的位置
    double parentLeft = this.Left;
    double parentTop = this.Top;
    double parentWidth = this.ActualWidth;
    double parentHeight = this.ActualHeight;
    
    double childWidth = childWindow.Width;
    double childHeight = childWindow.Height;
    
    double childLeft = parentLeft + (parentWidth - childWidth) / 2; // 设置子窗口在父窗口水平居中
    double childTop = parentTop + (parentHeight - childHeight) / 2; // 设置子窗口在父窗口垂直居中
    
    childWindow.Left = childLeft;
    childWindow.Top = childTop;
    
    childWindow.Owner = this; // 设置子窗口的所有者为父窗口
    childWindow.ShowDialog();
}